Refactor and enhance type safety across various modules

- Updated function parameters and return types in `page-preview.ts`, `pdf-decrypt.ts`, and `pymupdf-loader.ts` for improved type safety.
- Introduced type definitions for `CpdfInstance`, `PyMuPDFInstance`, and other related types to ensure better type checking.
- Enhanced error handling in `sanitize.ts` by creating a utility function for error messages.
- Removed unnecessary type assertions and improved type inference in `editor.ts`, `serialization.ts`, and `tools.test.ts`.
- Added type definitions for markdown-it plugins to improve compatibility and type safety.
- Enforced stricter TypeScript settings by enabling `noImplicitAny` in `tsconfig.json`.
- Cleaned up test files by refining type assertions and ensuring consistency in type usage.

eslint.config.mjs

@@ -1,47 +1,63 @@
-import globals from "globals";
+import globals from 'globals';
-import pluginJs from "@eslint/js";
+import pluginJs from '@eslint/js';
-import tseslint from "typescript-eslint";
+import tseslint from 'typescript-eslint';
-import eslintConfigPrettier from "eslint-config-prettier";
+import eslintConfigPrettier from 'eslint-config-prettier';
 
 export default [
-    { files: ["**/*.{js,mjs,cjs,ts}"] },
+  { files: ['**/*.{js,mjs,cjs,ts}'] },
-    { ignores: ["dist/**", "coverage/**", "node_modules/**", "**/.vitepress/cache/**", "public/**/*.min.js"] },
+  {
+    ignores: [
+      'dist/**',
+      'coverage/**',
+      'node_modules/**',
+      '**/.vitepress/cache/**',
+      'public/**/*.min.js',
+    ],
+  },
   { languageOptions: { globals: { ...globals.browser, ...globals.node } } },
   pluginJs.configs.recommended,
   ...tseslint.configs.recommended,
   eslintConfigPrettier,
   {
     rules: {
-            "@typescript-eslint/no-explicit-any": "warn",
+      '@typescript-eslint/no-explicit-any': 'warn',
-            "@typescript-eslint/no-unused-vars": ["warn", { "argsIgnorePattern": "^_" }],
+      '@typescript-eslint/no-unused-vars': [
-            "@typescript-eslint/no-unused-expressions": "warn",
+        'warn',
-            "no-redeclare": "warn",
+        {
-            "no-constant-condition": "warn",
+          argsIgnorePattern: '^_',
-            "no-ex-assign": "warn",
+          varsIgnorePattern: '^_',
-            "no-empty": "warn",
+          caughtErrorsIgnorePattern: '^_',
-            "no-case-declarations": "warn",
+          destructuredArrayIgnorePattern: '^_',
-            "@typescript-eslint/no-this-alias": "warn",
+        },
-            "no-func-assign": "warn",
+      ],
-            "no-fallthrough": "warn",
+      '@typescript-eslint/no-unused-expressions': 'warn',
-            "no-cond-assign": "warn",
+      'no-redeclare': 'warn',
-            "no-irregular-whitespace": "warn",
+      'no-constant-condition': 'warn',
-            "no-prototype-builtins": "warn",
+      'no-ex-assign': 'warn',
-            "no-undef": "warn",
+      'no-empty': 'warn',
-            "no-useless-escape": "warn",
+      'no-case-declarations': 'warn',
-            "no-unsafe-finally": "warn",
+      '@typescript-eslint/no-this-alias': 'warn',
-            "no-self-assign": "warn",
+      'no-func-assign': 'warn',
-            "no-control-regex": "warn",
+      'no-fallthrough': 'warn',
-            "@typescript-eslint/no-require-imports": "warn",
+      'no-cond-assign': 'warn',
-            "getter-return": "warn",
+      'no-irregular-whitespace': 'warn',
-            "no-constant-binary-expression": "warn",
+      'no-prototype-builtins': 'warn',
-            "@typescript-eslint/ban-ts-comment": "warn",
+      'no-undef': 'warn',
-            "no-unused-private-class-members": "warn",
+      'no-useless-escape': 'warn',
-            "no-unreachable": "warn",
+      'no-unsafe-finally': 'warn',
-            "no-setter-return": "warn",
+      'no-self-assign': 'warn',
-            "no-useless-catch": "warn",
+      'no-control-regex': 'warn',
-            "valid-typeof": "warn",
+      '@typescript-eslint/no-require-imports': 'warn',
-            "no-sparse-arrays": "warn",
+      'getter-return': 'warn',
-            "no-misleading-character-class": "warn"
+      'no-constant-binary-expression': 'warn',
-        }
+      '@typescript-eslint/ban-ts-comment': 'warn',
-    }
+      'no-unused-private-class-members': 'warn',
+      'no-unreachable': 'warn',
+      'no-setter-return': 'warn',
+      'no-useless-catch': 'warn',
+      'valid-typeof': 'warn',
+      'no-sparse-arrays': 'warn',
+      'no-misleading-character-class': 'warn',
+    },
+  },
 ];

src/js/canvasEditor.ts

@@ -4,25 +4,34 @@ import { state } from './state.js';
 import { toolLogic } from './logic/index.js';
 import { icons, createIcons } from 'lucide';
 import * as pdfjsLib from 'pdfjs-dist';
+import type { PDFDocumentProxy, PDFPageProxy } from 'pdfjs-dist';
+import type { CropBox } from '@/types';
 
-pdfjsLib.GlobalWorkerOptions.workerSrc = new URL('pdfjs-dist/build/pdf.worker.min.mjs', import.meta.url).toString();
+pdfjsLib.GlobalWorkerOptions.workerSrc = new URL(
-
+  'pdfjs-dist/build/pdf.worker.min.mjs',
+  import.meta.url
+).toString();
 
 const editorState: {
-  pdf: any;
+  pdf: PDFDocumentProxy | null;
-  canvas: any;
+  canvas: HTMLCanvasElement | null;
-  context: any;
+  context: CanvasRenderingContext2D | null;
-  container: any;
+  container: HTMLElement | null;
   currentPageNum: number;
   pageRendering: boolean;
   pageNumPending: number | null;
   scale: number | 'fit';
-  pageSnapshot: any;
+  pageSnapshot: ImageData | null;
   isDrawing: boolean;
   startX: number;
   startY: number;
-  cropBoxes: Record<number, any>;
+  cropBoxes: Record<number, CropBox>;
-  lastInteractionRect: { x: number; y: number; width: number; height: number } | null;
+  lastInteractionRect: {
+    x: number;
+    y: number;
+    width: number;
+    height: number;
+  } | null;
 } = {
   pdf: null,
   canvas: null,
@@ -37,15 +46,15 @@ const editorState: {
   startX: 0,
   startY: 0,
   cropBoxes: {},
-  lastInteractionRect: null, // Used to store the rectangle from the last move event
+  lastInteractionRect: null,
 };
 
 /**
  * Calculates the best scale to fit the page within the container.
  * @param {PDFPageProxy} page - The PDF.js page object.
  */
-function calculateFitScale(page: any) {
+function calculateFitScale(page: PDFPageProxy) {
-  const containerWidth = editorState.container.clientWidth;
+  const containerWidth = editorState.container!.clientWidth;
   const viewport = page.getViewport({ scale: 1.0 });
   return containerWidth / viewport.width;
 }
@@ -54,33 +63,34 @@ function calculateFitScale(page: any) {
  * Renders a specific page of the PDF onto the canvas.
  * @param {number} num The page number to render.
  */
-async function renderPage(num: any) {
+async function renderPage(num: number) {
   editorState.pageRendering = true;
   showLoader(`Loading page ${num}...`);
 
   try {
-    const page = await editorState.pdf.getPage(num);
+    const page = await editorState.pdf!.getPage(num);
 
     if (editorState.scale === 'fit') {
       editorState.scale = calculateFitScale(page);
     }
 
-    const viewport = page.getViewport({ scale: editorState.scale });
+    const viewport = page.getViewport({ scale: editorState.scale as number });
-    editorState.canvas.height = viewport.height;
+    editorState.canvas!.height = viewport.height;
-    editorState.canvas.width = viewport.width;
+    editorState.canvas!.width = viewport.width;
 
     const renderContext = {
-      canvasContext: editorState.context,
+      canvas: editorState.canvas,
+      canvasContext: editorState.context!,
       viewport: viewport,
     };
 
     await page.render(renderContext).promise;
 
-    editorState.pageSnapshot = editorState.context.getImageData(
+    editorState.pageSnapshot = editorState.context!.getImageData(
       0,
       0,
-      editorState.canvas.width,
+      editorState.canvas!.width,
-      editorState.canvas.height
+      editorState.canvas!.height
     );
     redrawShapes();
   } catch (error) {
@@ -90,12 +100,11 @@ async function renderPage(num: any) {
     editorState.pageRendering = false;
     hideLoader();
 
-    document.getElementById('current-page-display').textContent = num;
+    document.getElementById('current-page-display')!.textContent = String(num);
-    // @ts-expect-error TS(2339) FIXME: Property 'disabled' does not exist on type 'HTMLEl... Remove this comment to see the full error message
+    (document.getElementById('prev-page') as HTMLButtonElement).disabled =
-    document.getElementById('prev-page').disabled = num <= 1;
+      num <= 1;
-    // @ts-expect-error TS(2339) FIXME: Property 'disabled' does not exist on type 'HTMLEl... Remove this comment to see the full error message
+    (document.getElementById('next-page') as HTMLButtonElement).disabled =
-    document.getElementById('next-page').disabled =
+      num >= editorState.pdf!.numPages;
-      num >= editorState.pdf.numPages;
 
     if (editorState.pageNumPending !== null) {
       const pendingPage = editorState.pageNumPending;
@@ -105,7 +114,7 @@ async function renderPage(num: any) {
   }
 }
 
-function queueRenderPage(num: any) {
+function queueRenderPage(num: number) {
   if (editorState.pageRendering) {
     editorState.pageNumPending = num;
   } else {
@@ -116,36 +125,37 @@ function queueRenderPage(num: any) {
 
 function redrawShapes() {
   if (editorState.pageSnapshot) {
-    editorState.context.putImageData(editorState.pageSnapshot, 0, 0);
+    editorState.context!.putImageData(editorState.pageSnapshot, 0, 0);
   }
 
   const currentCropBox = editorState.cropBoxes[editorState.currentPageNum - 1];
   if (currentCropBox) {
-    editorState.context.strokeStyle = 'rgba(79, 70, 229, 0.9)';
+    editorState.context!.strokeStyle = 'rgba(79, 70, 229, 0.9)';
-    editorState.context.lineWidth = 2;
+    editorState.context!.lineWidth = 2;
-    editorState.context.setLineDash([8, 4]);
+    editorState.context!.setLineDash([8, 4]);
-    editorState.context.strokeRect(
+    editorState.context!.strokeRect(
       currentCropBox.x,
       currentCropBox.y,
       currentCropBox.width,
       currentCropBox.height
     );
-    editorState.context.setLineDash([]);
+    editorState.context!.setLineDash([]);
   }
 }
 
-function getEventCoordinates(e: any) {
+function getEventCoordinates(e: MouseEvent | TouchEvent) {
-  const rect = editorState.canvas.getBoundingClientRect();
+  const rect = editorState.canvas!.getBoundingClientRect();
-  const touch = e.touches ? e.touches[0] : e;
+  const touch =
-  const scaleX = editorState.canvas.width / rect.width;
+    'touches' in e && e.touches.length > 0 ? e.touches[0] : (e as MouseEvent);
-  const scaleY = editorState.canvas.height / rect.height;
+  const scaleX = editorState.canvas!.width / rect.width;
+  const scaleY = editorState.canvas!.height / rect.height;
   return {
     x: (touch.clientX - rect.left) * scaleX,
     y: (touch.clientY - rect.top) * scaleY,
   };
 }
 
-function handleInteractionStart(e: any) {
+function handleInteractionStart(e: MouseEvent | TouchEvent) {
   e.preventDefault();
   const coords = getEventCoordinates(e);
   editorState.isDrawing = true;
@@ -153,7 +163,7 @@ function handleInteractionStart(e: any) {
   editorState.startY = coords.y;
 }
 
-function handleInteractionMove(e: any) {
+function handleInteractionMove(e: MouseEvent | TouchEvent) {
   if (!editorState.isDrawing) return;
   e.preventDefault();
 
@@ -165,13 +175,12 @@ function handleInteractionMove(e: any) {
   const width = Math.abs(editorState.startX - coords.x);
   const height = Math.abs(editorState.startY - coords.y);
 
-  editorState.context.strokeStyle = 'rgba(79, 70, 229, 0.9)';
+  editorState.context!.strokeStyle = 'rgba(79, 70, 229, 0.9)';
-  editorState.context.lineWidth = 2;
+  editorState.context!.lineWidth = 2;
-  editorState.context.setLineDash([8, 4]);
+  editorState.context!.setLineDash([8, 4]);
-  editorState.context.strokeRect(x, y, width, height);
+  editorState.context!.strokeRect(x, y, width, height);
-  editorState.context.setLineDash([]);
+  editorState.context!.setLineDash([]);
 
-  // Store the last valid rectangle drawn during the move event
   editorState.lastInteractionRect = { x, y, width, height };
 }
 
@@ -192,12 +201,14 @@ function handleInteractionEnd() {
     scale: editorState.scale,
   };
 
-  editorState.lastInteractionRect = null; // Reset for the next drawing action
+  editorState.lastInteractionRect = null;
   redrawShapes();
 }
 
-export async function setupCanvasEditor(toolId: any) {
+export async function setupCanvasEditor(toolId: string) {
-  editorState.canvas = document.getElementById('canvas-editor');
+  editorState.canvas = document.getElementById(
+    'canvas-editor'
+  ) as HTMLCanvasElement | null;
   if (!editorState.canvas) return;
   editorState.container = document.getElementById('canvas-container');
   editorState.context = editorState.canvas.getContext('2d');
@@ -210,7 +221,7 @@ export async function setupCanvasEditor(toolId: any) {
   editorState.currentPageNum = 1;
   editorState.scale = 'fit';
 
-  pageNav.textContent = '';
+  pageNav!.textContent = '';
 
   const prevButton = document.createElement('button');
   prevButton.id = 'prev-page';
@@ -237,22 +248,21 @@ export async function setupCanvasEditor(toolId: any) {
     'btn p-2 rounded-full bg-gray-700 hover:bg-gray-600 disabled:opacity-50';
   nextButton.innerHTML = '<i data-lucide="chevron-right"></i>';
 
-  pageNav.append(prevButton, pageInfo, nextButton);
+  pageNav!.append(prevButton, pageInfo, nextButton);
 
   createIcons({ icons });
 
-  document.getElementById('prev-page').addEventListener('click', () => {
+  document.getElementById('prev-page')!.addEventListener('click', () => {
     if (editorState.currentPageNum > 1)
       queueRenderPage(editorState.currentPageNum - 1);
   });
-  document.getElementById('next-page').addEventListener('click', () => {
+  document.getElementById('next-page')!.addEventListener('click', () => {
-    if (editorState.currentPageNum < editorState.pdf.numPages)
+    if (editorState.currentPageNum < editorState.pdf!.numPages)
       queueRenderPage(editorState.currentPageNum + 1);
   });
 
-  // To prevent stacking multiple listeners, we replace the canvas element with a clone
+  const newCanvas = editorState.canvas.cloneNode(true) as HTMLCanvasElement;
-  const newCanvas = editorState.canvas.cloneNode(true);
+  editorState.canvas.parentNode!.replaceChild(newCanvas, editorState.canvas);
-  editorState.canvas.parentNode.replaceChild(newCanvas, editorState.canvas);
   editorState.canvas = newCanvas;
   editorState.context = newCanvas.getContext('2d');
 
@@ -272,33 +282,36 @@ export async function setupCanvasEditor(toolId: any) {
   editorState.canvas.addEventListener('touchend', handleInteractionEnd);
 
   if (toolId === 'crop') {
-    document.getElementById('zoom-in-btn').onclick = () => {
+    (document.getElementById('zoom-in-btn') as HTMLElement).onclick = () => {
       if (typeof editorState.scale === 'number') {
         editorState.scale += 0.25;
       }
       renderPage(editorState.currentPageNum);
     };
-    document.getElementById('zoom-out-btn').onclick = () => {
+    (document.getElementById('zoom-out-btn') as HTMLElement).onclick = () => {
       if (typeof editorState.scale === 'number' && editorState.scale > 0.25) {
         editorState.scale -= 0.25;
         renderPage(editorState.currentPageNum);
       }
     };
-    document.getElementById('fit-page-btn').onclick = async () => {
+    (document.getElementById('fit-page-btn') as HTMLElement).onclick =
-      const page = await editorState.pdf.getPage(editorState.currentPageNum);
+      async () => {
+        const page = await editorState.pdf!.getPage(editorState.currentPageNum);
         editorState.scale = calculateFitScale(page);
         renderPage(editorState.currentPageNum);
       };
-    document.getElementById('clear-crop-btn').onclick = () => {
+    (document.getElementById('clear-crop-btn') as HTMLElement).onclick = () => {
       delete editorState.cropBoxes[editorState.currentPageNum - 1];
       redrawShapes();
     };
-    document.getElementById('clear-all-crops-btn').onclick = () => {
+    (document.getElementById('clear-all-crops-btn') as HTMLElement).onclick =
+      () => {
         editorState.cropBoxes = {};
         redrawShapes();
       };
 
-    document.getElementById('process-btn').onclick = async () => {
+    (document.getElementById('process-btn') as HTMLElement).onclick =
+      async () => {
         if (Object.keys(editorState.cropBoxes).length === 0) {
           showAlert(
             'No Area Selected',
@@ -306,9 +319,11 @@ export async function setupCanvasEditor(toolId: any) {
           );
           return;
         }
-      const success = await toolLogic['crop-pdf'].process(
+        const cropLogic = toolLogic['crop-pdf'];
-        editorState.cropBoxes
+        const success =
-      );
+          typeof cropLogic === 'object' && cropLogic.process
+            ? await cropLogic.process(editorState.cropBoxes)
+            : false;
         if (success) {
           showAlert(
             'Success!',

src/js/compare/engine/compare.worker.ts

@@ -4,7 +4,6 @@ import type {
   CompareTextItem,
   ComparePageSignature,
   ComparePagePair,
-  ComparePageResult,
   CompareChangeSummary,
   CompareTextChange,
 } from '../types.ts';
@@ -44,8 +43,6 @@ interface ErrorResult {
   message: string;
 }
 
-type WorkerResult = DiffResult | PairResult | ErrorResult;
-
 self.onmessage = function (e: MessageEvent<WorkerMessage>) {
   const msg = e.data;
   try {

src/js/handlers/fileHandler.ts

@@ -58,13 +58,13 @@ async function handleSinglePdfUpload(toolId: string, file: File) {
       const processBtn = document.getElementById('process-btn');
       if (processBtn) {
         const logic = toolLogic[toolId];
-        if (logic && logic.process) {
+        if (logic && typeof logic === 'object' && logic.process) {
           processBtn.onclick = logic.process;
         }
       }
 
       const logic = toolLogic[toolId];
-      if (logic && logic.setup) {
+      if (logic && typeof logic === 'object' && logic.setup) {
         await logic.setup();
       }
       return;
@@ -102,8 +102,12 @@ async function handleSinglePdfUpload(toolId: string, file: File) {
       const logic = toolLogic[toolId];
       if (logic) {
         const func =
-          typeof logic.process === 'function' ? logic.process : logic;
+          typeof logic === 'object' && typeof logic.process === 'function'
-        processBtn.onclick = func;
+            ? logic.process
+            : typeof logic === 'function'
+              ? logic
+              : null;
+        if (func) processBtn.onclick = func;
       }
     }
 
@@ -281,13 +285,17 @@ async function handleSinglePdfUpload(toolId: string, file: File) {
         const infoSection = createSection('Info Dictionary');
         if (info && Object.keys(info).length > 0) {
           for (const key in info) {
-            const value = info[key];
+            const value = (info as Record<string, unknown>)[key];
-            let displayValue;
+            let displayValue: string;
 
             if (value === null || typeof value === 'undefined') {
               displayValue = '- Not Set -';
-            } else if (typeof value === 'object' && value.name) {
+            } else if (
-              displayValue = value.name;
+              typeof value === 'object' &&
+              'name' in (value as object) &&
+              (value as Record<string, unknown>).name
+            ) {
+              displayValue = String((value as Record<string, unknown>).name);
             } else if (typeof value === 'object') {
               try {
                 displayValue = JSON.stringify(value);
@@ -524,7 +532,8 @@ async function handleSinglePdfUpload(toolId: string, file: File) {
     }
 
     if (toolId === 'page-dimensions') {
-      toolLogic['page-dimensions']();
+      const pageDimLogic = toolLogic['page-dimensions'];
+      if (typeof pageDimLogic === 'function') pageDimLogic();
     }
 
     if (toolId === 'pdf-to-jpg') {
@@ -569,8 +578,13 @@ async function handleSinglePdfUpload(toolId: string, file: File) {
       }
     }
 
-    if (toolLogic[toolId] && typeof toolLogic[toolId].setup === 'function') {
+    const setupLogic = toolLogic[toolId];
-      toolLogic[toolId].setup();
+    if (
+      setupLogic &&
+      typeof setupLogic === 'object' &&
+      typeof setupLogic.setup === 'function'
+    ) {
+      setupLogic.setup();
     }
   } catch (e) {
     hideLoader();
@@ -656,13 +670,19 @@ async function handleMultiFileUpload(toolId: string) {
     (processBtn as HTMLButtonElement).disabled = false;
     const logic = toolLogic[toolId];
     if (logic) {
-      const func = typeof logic.process === 'function' ? logic.process : logic;
+      const func =
-      processBtn.onclick = func;
+        typeof logic === 'object' && typeof logic.process === 'function'
+          ? logic.process
+          : typeof logic === 'function'
+            ? logic
+            : null;
+      if (func) processBtn.onclick = func;
     }
   }
 
   if (toolId === 'alternate-merge') {
-    toolLogic['alternate-merge'].setup();
+    const altMerge = toolLogic['alternate-merge'];
+    if (typeof altMerge === 'object' && altMerge.setup) altMerge.setup();
   } else if (toolId === 'image-to-pdf') {
     const imageList = document.getElementById('image-list');
 
@@ -869,9 +889,8 @@ export function setupFileInputHandler(toolId: string) {
           processBtn.onclick = () => {
             const logic = toolLogic[toolId];
             if (logic) {
-              const func =
+              if (typeof logic === 'function') logic();
-                typeof logic.process === 'function' ? logic.process : logic;
+              else if (logic.process) logic.process();
-              func();
             }
           };
         }
@@ -893,9 +912,8 @@ export function setupFileInputHandler(toolId: string) {
         processBtn.onclick = () => {
           const logic = toolLogic[toolId];
           if (logic) {
-            const func =
+            if (typeof logic === 'function') logic();
-              typeof logic.process === 'function' ? logic.process : logic;
+            else if (logic.process) logic.process();
-            func();
           }
         };
       }

src/js/logic/add-page-labels-page.ts

@@ -3,6 +3,7 @@ import type {
   AddPageLabelsState,
   LabelRule,
   PageLabelStyleName,
+  CpdfInstance,
 } from '@/types';
 import { showAlert, showLoader, hideLoader } from '../ui.js';
 import { t } from '../i18n/index.js';
@@ -20,30 +21,6 @@ import {
 } from '../utils/page-labels.js';
 import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
-type AddPageLabelsCpdf = {
-  setSlow?: () => void;
-  fromMemory(data: Uint8Array, userpw: string): CoherentPdf;
-  removePageLabels(pdf: CoherentPdf): void;
-  parsePagespec(pdf: CoherentPdf, pagespec: string): CpdfPageRange;
-  all(pdf: CoherentPdf): CpdfPageRange;
-  addPageLabels(
-    pdf: CoherentPdf,
-    style: CpdfLabelStyle,
-    prefix: string,
-    offset: number,
-    range: CpdfPageRange,
-    progress: boolean
-  ): void;
-  toMemory(pdf: CoherentPdf, linearize: boolean, makeId: boolean): Uint8Array;
-  deletePdf(pdf: CoherentPdf): void;
-  decimalArabic: CpdfLabelStyle;
-  lowercaseRoman: CpdfLabelStyle;
-  uppercaseRoman: CpdfLabelStyle;
-  lowercaseLetters: CpdfLabelStyle;
-  uppercaseLetters: CpdfLabelStyle;
-  noLabelPrefixOnly?: CpdfLabelStyle;
-};
-
 let labelRuleCounter = 0;
 
 const translate = (
@@ -464,8 +441,8 @@ async function addPageLabels() {
       ) as HTMLInputElement | null
     )?.checked ?? true;
 
-  let cpdf: AddPageLabelsCpdf | null = null;
+  let cpdf: CpdfInstance | null = null;
-  let pdf: CoherentPdf | null = null;
+  let pdf: unknown = null;
 
   try {
     cpdf = await getCpdf();
@@ -482,7 +459,7 @@ async function addPageLabels() {
       const rule = pageState.rules[index];
       const trimmedRange = rule.pageRange.trim();
 
-      let range: CpdfPageRange;
+      let range: unknown;
       try {
         range = trimmedRange
           ? cpdf.parsePagespec(pdf, trimmedRange)

src/js/logic/add-stamps.ts

@@ -9,7 +9,6 @@ import { loadPdfWithPasswordPrompt } from '../utils/password-prompt.js';
 
 let selectedFile: File | null = null;
 let viewerIframe: HTMLIFrameElement | null = null;
-let viewerReady = false;
 let currentBlobUrl: string | null = null;
 
 const pdfInput = document.getElementById('pdfFile') as HTMLInputElement;
@@ -47,7 +46,7 @@ function resetState() {
     viewerContainer.removeChild(viewerIframe);
   }
   viewerIframe = null;
-  viewerReady = false;
+
   if (viewerCard) viewerCard.classList.add('hidden');
   if (saveStampedBtn) saveStampedBtn.classList.add('hidden');
 
@@ -157,7 +156,6 @@ async function loadPdfInViewer(file: File) {
     currentBlobUrl = null;
   }
   viewerIframe = null;
-  viewerReady = false;
 
   // Calculate and apply dynamic height
   await adjustViewerHeight(file);
@@ -169,7 +167,7 @@ async function loadPdfInViewer(file: File) {
   try {
     const existingPrefsRaw = localStorage.getItem('pdfjs.preferences');
     const existingPrefs = existingPrefsRaw ? JSON.parse(existingPrefsRaw) : {};
-    delete (existingPrefs as any).annotationEditorMode;
+    delete (existingPrefs as Record<string, unknown>).annotationEditorMode;
     const newPrefs = {
       ...existingPrefs,
       enablePermissions: false,
@@ -204,7 +202,14 @@ async function loadPdfInViewer(file: File) {
 
 function setupAnnotationViewer(iframe: HTMLIFrameElement) {
   try {
-    const win = iframe.contentWindow as any;
+    const win = iframe.contentWindow as
+      | (Window & {
+          PDFViewerApplication?: {
+            initializedPromise?: Promise<void>;
+            eventBus?: { _on?: (event: string, callback: () => void) => void };
+          };
+        })
+      | null;
     const doc = win?.document as Document | null;
     if (!win || !doc) return;
 
@@ -238,8 +243,6 @@ function setupAnnotationViewer(iframe: HTMLIFrameElement) {
         if (root) {
           root.classList.add('PdfjsAnnotationExtension_Comment_hidden');
         }
-
-        viewerReady = true;
       } catch (e) {
         console.error(
           'Failed to initialize annotation viewer for Add Stamps:',
@@ -304,8 +307,14 @@ if (saveStampedBtn) {
     }
 
     try {
-      const win = viewerIframe.contentWindow as any;
+      const win = viewerIframe.contentWindow as
-      const extensionInstance = win?.pdfjsAnnotationExtensionInstance as any;
+        | (Window & {
+            pdfjsAnnotationExtensionInstance?: {
+              exportPdf?: () => Promise<void>;
+            };
+          })
+        | null;
+      const extensionInstance = win?.pdfjsAnnotationExtensionInstance;
 
       if (
         extensionInstance &&

src/js/logic/add-watermark-page.ts

@@ -1013,9 +1013,12 @@ async function applyWatermark() {
       'watermarked.pdf'
     );
     showAlert('Success', 'Watermark added successfully!', 'success');
-  } catch (e: any) {
+  } catch (e: unknown) {
     console.error(e);
-    showAlert('Error', e.message || 'Could not add the watermark.');
+    showAlert(
+      'Error',
+      e instanceof Error ? e.message : 'Could not add the watermark.'
+    );
   } finally {
     hideLoader();
   }

src/js/logic/bookmark-pdf.ts

@@ -7,7 +7,6 @@ import '../../css/bookmark.css';
 import { initializeGlobalShortcuts } from '../utils/shortcuts-init.js';
 import {
   truncateFilename,
-  getPDFDocument,
   formatBytes,
   downloadFile,
   escapeHtml,
@@ -46,7 +45,6 @@ let isPickingDestination = false;
 let currentPickingCallback: DestinationCallback | null = null;
 let destinationMarker: HTMLDivElement | null = null;
 let savedModalOverlay: HTMLDivElement | null = null;
-let savedModal: HTMLDivElement | null = null;
 let currentViewport: PageViewport | null = null;
 let currentZoom = 1.0;
 const fileInput = document.getElementById(
@@ -463,7 +461,6 @@ class="w-full px-2 py-1 border border-gray-300 rounded text-sm text-gray-900" />
     if (pickDestBtn) {
       pickDestBtn.addEventListener('click', () => {
         savedModalOverlay = overlay;
-        savedModal = modal;
         overlay.style.display = 'none';
 
         startDestinationPicking((page: number, pdfX: number, pdfY: number) => {
@@ -699,7 +696,6 @@ function cancelDestinationPicking(): void {
   if (savedModalOverlay) {
     savedModalOverlay.style.display = '';
     savedModalOverlay = null;
-    savedModal = null;
   }
 }
 
@@ -1317,7 +1313,7 @@ jsonInput?.addEventListener('change', async (e: Event) => {
       'JSON Loaded',
       'Loaded bookmarks from JSON. Now upload your PDF.'
     );
-  } catch (err) {
+  } catch {
     await showAlertModal('Error', 'Invalid JSON format');
   }
 });
@@ -2018,7 +2014,7 @@ jsonImportHidden?.addEventListener('change', async (e: Event) => {
     saveState();
     renderBookmarkTree();
     await showAlertModal('Success', 'Bookmarks imported from JSON!');
-  } catch (err) {
+  } catch {
     await showAlertModal('Error', 'Invalid JSON format');
   }
 

src/js/logic/cbz-to-pdf-page.ts

@@ -2,9 +2,8 @@ import { showLoader, hideLoader, showAlert } from '../ui.js';
 import { downloadFile, formatBytes } from '../utils/helpers.js';
 import { state } from '../state.js';
 import { createIcons, icons } from 'lucide';
-import { isWasmAvailable, getWasmBaseUrl } from '../config/wasm-cdn-config.js';
+import { loadPyMuPDF } from '../utils/pymupdf-loader.js';
-import { showWasmRequiredDialog } from '../utils/wasm-provider.js';
+import type { PyMuPDFInstance } from '@/types';
-import { loadPyMuPDF, isPyMuPDFAvailable } from '../utils/pymupdf-loader.js';
 import JSZip from 'jszip';
 import { PDFDocument } from 'pdf-lib';
 
@@ -176,8 +175,8 @@ async function convertCbzToPdf(file: File): Promise<Blob> {
 }
 
 async function convertCbrToPdf(file: File): Promise<Blob> {
-  const pymupdf = await loadPyMuPDF();
+  const pymupdf = (await loadPyMuPDF()) as PyMuPDFInstance;
-  return await (pymupdf as any).convertToPdf(file, { filetype: 'cbz' });
+  return await pymupdf.convertToPdf(file, { filetype: 'cbz' });
 }
 
 document.addEventListener('DOMContentLoaded', () => {
@@ -314,12 +313,12 @@ document.addEventListener('DOMContentLoaded', () => {
           () => resetState()
         );
       }
-    } catch (e: any) {
+    } catch (e: unknown) {
       console.error(`[${TOOL_NAME}2PDF] ERROR:`, e);
       hideLoader();
       showAlert(
         'Error',
-        `An error occurred during conversion. Error: ${e.message}`
+        `An error occurred during conversion. Error: ${e instanceof Error ? e.message : String(e)}`
       );
     }
   };

src/js/logic/change-permissions-page.ts

@@ -6,7 +6,7 @@ import {
   readFileAsArrayBuffer,
 } from '../utils/helpers.js';
 import { icons, createIcons } from 'lucide';
-import { ChangePermissionsState } from '@/types';
+import { ChangePermissionsState, QpdfInstanceExtended } from '@/types';
 
 const pageState: ChangePermissionsState = {
   file: null,
@@ -114,7 +114,7 @@ async function changePermissions() {
 
   const inputPath = '/input.pdf';
   const outputPath = '/output.pdf';
-  let qpdf: any;
+  let qpdf: QpdfInstanceExtended;
 
   const loaderModal = document.getElementById('loader-modal');
   const loaderText = document.getElementById('loader-text');
@@ -187,10 +187,10 @@ async function changePermissions() {
     args.push('--', outputPath);
     try {
       qpdf.callMain(args);
-    } catch (qpdfError: any) {
+    } catch (qpdfError: unknown) {
       console.error('qpdf execution error:', qpdfError);
 
-      const errorMsg = qpdfError.message || '';
+      const errorMsg = qpdfError instanceof Error ? qpdfError.message : '';
 
       if (
         errorMsg.includes('invalid password') ||
@@ -219,7 +219,9 @@ async function changePermissions() {
       throw new Error('Processing resulted in an empty file.');
     }
 
-    const blob = new Blob([outputFile], { type: 'application/pdf' });
+    const blob = new Blob([new Uint8Array(outputFile)], {
+      type: 'application/pdf',
+    });
     downloadFile(blob, `permissions-changed-${pageState.file.name}`);
 
     if (loaderModal) loaderModal.classList.add('hidden');
@@ -233,16 +235,17 @@ async function changePermissions() {
     showAlert('Success', successMessage, 'success', () => {
       resetState();
     });
-  } catch (error: any) {
+  } catch (error: unknown) {
     console.error('Error during PDF permission change:', error);
     if (loaderModal) loaderModal.classList.add('hidden');
 
-    if (error.message === 'INVALID_PASSWORD') {
+    const errorMessage = error instanceof Error ? error.message : '';
+    if (errorMessage === 'INVALID_PASSWORD') {
       showAlert(
         'Incorrect Password',
         'The current password you entered is incorrect. Please try again.'
       );
-    } else if (error.message === 'PASSWORD_REQUIRED') {
+    } else if (errorMessage === 'PASSWORD_REQUIRED') {
       showAlert(
         'Password Required',
         'This PDF is password-protected. Please enter the current password to proceed.'
@@ -250,7 +253,7 @@ async function changePermissions() {
     } else {
       showAlert(
         'Processing Failed',
-        `An error occurred: ${error.message || 'The PDF might be corrupted or password protected.'}`
+        `An error occurred: ${errorMessage || 'The PDF might be corrupted or password protected.'}`
       );
     }
   } finally {

src/js/logic/compress-pdf-page.ts

@@ -85,7 +85,10 @@ async function performCondenseCompression(
     scrub: {
       metadata: customSettings?.removeMetadata ?? preset.scrub.metadata,
       thumbnails: customSettings?.removeThumbnails ?? preset.scrub.thumbnails,
-      xmlMetadata: (preset.scrub as any).xmlMetadata ?? false,
+      xmlMetadata:
+        'xmlMetadata' in preset.scrub
+          ? (preset.scrub as { xmlMetadata: boolean }).xmlMetadata
+          : false,
     },
     subsetFonts: customSettings?.subsetFonts ?? preset.subsetFonts,
     save: {
@@ -99,8 +102,8 @@ async function performCondenseCompression(
   try {
     const result = await pymupdf.compressPdf(fileBlob, options);
     return result;
-  } catch (error: any) {
+  } catch (error: unknown) {
-    const errorMessage = error?.message || String(error);
+    const errorMessage = error instanceof Error ? error.message : String(error);
     if (
       errorMessage.includes('PatternType') ||
       errorMessage.includes('pattern')
@@ -432,7 +435,7 @@ document.addEventListener('DOMContentLoaded', () => {
           usedMethod = 'Condense';
 
           // Check if fallback was used
-          if ((result as any).usedFallback) {
+          if ((result as { usedFallback?: boolean }).usedFallback) {
             usedMethod +=
               ' (without image optimization due to unsupported patterns)';
           }
@@ -551,12 +554,12 @@ document.addEventListener('DOMContentLoaded', () => {
           );
         }
       }
-    } catch (e: any) {
+    } catch (e: unknown) {
       hideLoader();
       console.error('[CompressPDF] Error:', e);
       showAlert(
         'Error',
-        `An error occurred during compression. Error: ${e.message}`
+        `An error occurred during compression. Error: ${e instanceof Error ? e.message : String(e)}`
       );
     }
   };

src/js/logic/crop-pdf-page.ts

@@ -5,7 +5,7 @@ import { loadPdfWithPasswordPrompt } from '../utils/password-prompt.js';
 import Cropper from 'cropperjs';
 import * as pdfjsLib from 'pdfjs-dist';
 import { PDFDocument as PDFLibDocument } from 'pdf-lib';
-import { CropperState } from '@/types';
+import { CropperState, CropPercentages } from '@/types';
 import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
 pdfjsLib.GlobalWorkerOptions.workerSrc = new URL(
@@ -167,7 +167,11 @@ async function displayPageAsImage(num: number) {
     const tempCtx = tempCanvas.getContext('2d');
     tempCanvas.width = viewport.width;
     tempCanvas.height = viewport.height;
-    await page.render({ canvasContext: tempCtx, viewport: viewport }).promise;
+    await page.render({
+      canvas: null,
+      canvasContext: tempCtx,
+      viewport: viewport,
+    }).promise;
 
     if (cropperState.cropper) cropperState.cropper.destroy();
 
@@ -251,7 +255,7 @@ async function performCrop() {
     document.getElementById('apply-to-all-toggle') as HTMLInputElement
   )?.checked;
 
-  let finalCropData: Record<number, any> = {};
+  let finalCropData: Record<number, CropPercentages> = {};
 
   if (isApplyToAll) {
     const currentCrop = cropperState.pageCrops[cropperState.currentPageNum];
@@ -286,7 +290,7 @@ async function performCrop() {
 
     const fileName = isDestructive ? 'flattened_crop.pdf' : 'standard_crop.pdf';
     downloadFile(
-      new Blob([finalPdfBytes], { type: 'application/pdf' }),
+      new Blob([new Uint8Array(finalPdfBytes)], { type: 'application/pdf' }),
       fileName
     );
     showAlert(
@@ -304,7 +308,7 @@ async function performCrop() {
 }
 
 async function performMetadataCrop(
-  cropData: Record<number, any>
+  cropData: Record<number, CropPercentages>
 ): Promise<Uint8Array> {
   const pdfToModify = await loadPdfDocument(cropperState.originalPdfBytes!);
 
@@ -344,7 +348,7 @@ async function performMetadataCrop(
 }
 
 async function performFlatteningCrop(
-  cropData: Record<number, any>
+  cropData: Record<number, CropPercentages>
 ): Promise<Uint8Array> {
   const newPdfDoc = await PDFLibDocument.create();
   const sourcePdfDocForCopying = await loadPdfDocument(
@@ -364,7 +368,11 @@ async function performFlatteningCrop(
       const tempCtx = tempCanvas.getContext('2d');
       tempCanvas.width = viewport.width;
       tempCanvas.height = viewport.height;
-      await page.render({ canvasContext: tempCtx, viewport: viewport }).promise;
+      await page.render({
+        canvas: null,
+        canvasContext: tempCtx,
+        viewport: viewport,
+      }).promise;
 
       const finalCanvas = document.createElement('canvas');
       const finalCtx = finalCanvas.getContext('2d');

src/js/logic/cropper.ts

@@ -16,7 +16,17 @@ pdfjsLib.GlobalWorkerOptions.workerSrc = new URL(
 ).toString();
 
 // --- Global State for the Cropper Tool ---
-const cropperState = {
+import type { CropPercentages } from '@/types';
+import type { PDFDocumentProxy } from 'pdfjs-dist';
+
+const cropperState: {
+  pdfDoc: PDFDocumentProxy | null;
+  currentPageNum: number;
+  cropper: Cropper | null;
+  originalPdfBytes: Uint8Array | null;
+  cropperImageElement: HTMLImageElement | null;
+  pageCrops: Record<number, CropPercentages>;
+} = {
   pdfDoc: null,
   currentPageNum: 1,
   cropper: null,
@@ -46,7 +56,8 @@ function saveCurrentCrop() {
  * Renders a PDF page to the Cropper UI as an image.
  * @param {number} num The page number to render.
  */
-async function displayPageAsImage(num: any) {
+
+async function displayPageAsImage(num: number) {
   showLoader(`Rendering Page ${num}...`);
 
   try {
@@ -57,7 +68,11 @@ async function displayPageAsImage(num: any) {
     const tempCtx = tempCanvas.getContext('2d');
     tempCanvas.width = viewport.width;
     tempCanvas.height = viewport.height;
-    await page.render({ canvasContext: tempCtx, viewport: viewport }).promise;
+    await page.render({
+      canvas: null,
+      canvasContext: tempCtx,
+      viewport: viewport,
+    }).promise;
 
     if (cropperState.cropper) {
       cropperState.cropper.destroy();
@@ -107,7 +122,7 @@ async function displayPageAsImage(num: any) {
  * Handles page navigation.
  * @param {number} offset -1 for previous, 1 for next.
  */
-async function changePage(offset: any) {
+async function changePage(offset: number) {
   // Save the current page's crop before changing
   saveCurrentCrop();
 
@@ -137,7 +152,13 @@ function enableControls() {
 /**
  * Performs a non-destructive crop by updating the page's crop box.
  */
-async function performMetadataCrop(pdfToModify: any, cropData: any) {
+async function performMetadataCrop(
+  pdfToModify: PDFLibDocument,
+  cropData: Record<
+    string,
+    { x: number; y: number; width: number; height: number }
+  >
+) {
   for (const pageNum in cropData) {
     const pdfJsPage = await cropperState.pdfDoc.getPage(Number(pageNum));
     const viewport = pdfJsPage.getViewport({ scale: 1 });
@@ -183,7 +204,12 @@ async function performMetadataCrop(pdfToModify: any, cropData: any) {
 /**
  * Performs a destructive crop by flattening the selected area to an image.
  */
-async function performFlatteningCrop(cropData: any) {
+async function performFlatteningCrop(
+  cropData: Record<
+    string,
+    { x: number; y: number; width: number; height: number }
+  >
+) {
   const newPdfDoc = await PDFLibDocument.create();
 
   // Load the original PDF with pdf-lib to copy un-cropped pages from
@@ -204,7 +230,11 @@ async function performFlatteningCrop(cropData: any) {
       const tempCtx = tempCanvas.getContext('2d');
       tempCanvas.width = viewport.width;
       tempCanvas.height = viewport.height;
-      await page.render({ canvasContext: tempCtx, viewport: viewport }).promise;
+      await page.render({
+        canvas: null,
+        canvasContext: tempCtx,
+        viewport: viewport,
+      }).promise;
 
       const finalCanvas = document.createElement('canvas');
       const finalCtx = finalCanvas.getContext('2d');
@@ -264,7 +294,7 @@ export async function setupCropperTool() {
     cropperState.pageCrops = {};
 
     const arrayBuffer = await readFileAsArrayBuffer(state.files[0]);
-    cropperState.originalPdfBytes = arrayBuffer;
+    cropperState.originalPdfBytes = new Uint8Array(arrayBuffer as ArrayBuffer);
     const arrayBufferForPdfJs = (arrayBuffer as ArrayBuffer).slice(0);
     const loadingTask = getPDFDocument({ data: arrayBufferForPdfJs });
 
@@ -295,7 +325,7 @@ export async function setupCropperTool() {
       document.getElementById('apply-to-all-toggle') as HTMLInputElement
     ).checked;
 
-    let finalCropData = {};
+    let finalCropData: Record<number, CropPercentages> = {};
     if (isApplyToAll) {
       const currentCrop = cropperState.pageCrops[cropperState.currentPageNum];
       if (!currentCrop) {
@@ -308,10 +338,13 @@ export async function setupCropperTool() {
       }
     } else {
       // If not applying to all, only process pages with saved crops
-      finalCropData = Object.keys(cropperState.pageCrops).reduce((obj, key) => {
+      finalCropData = Object.keys(cropperState.pageCrops).reduce(
-        obj[key] = cropperState.pageCrops[key];
+        (obj, key) => {
+          obj[Number(key)] = cropperState.pageCrops[Number(key)];
           return obj;
-      });
+        },
+        {} as Record<number, CropPercentages>
+      );
     }
 
     if (Object.keys(finalCropData).length === 0) {
@@ -341,7 +374,7 @@ export async function setupCropperTool() {
         ? 'flattened_crop.pdf'
         : 'standard_crop.pdf';
       downloadFile(
-        new Blob([finalPdfBytes], { type: 'application/pdf' }),
+        new Blob([new Uint8Array(finalPdfBytes)], { type: 'application/pdf' }),
         fileName
       );
       showAlert('Success', 'Crop complete! Your download has started.');

src/js/logic/csv-to-pdf-page.ts

@@ -1,9 +1,5 @@
 import { showLoader, hideLoader, showAlert } from '../ui.js';
-import {
+import { downloadFile, formatBytes } from '../utils/helpers.js';
-    downloadFile,
-    readFileAsArrayBuffer,
-    formatBytes,
-} from '../utils/helpers.js';
 import { state } from '../state.js';
 import { createIcons, icons } from 'lucide';
 
@@ -36,13 +32,15 @@ document.addEventListener('DOMContentLoaded', () => {
         for (let index = 0; index < state.files.length; index++) {
           const file = state.files[index];
           const fileDiv = document.createElement('div');
-                    fileDiv.className = 'flex items-center justify-between bg-gray-700 p-3 rounded-lg text-sm';
+          fileDiv.className =
+            'flex items-center justify-between bg-gray-700 p-3 rounded-lg text-sm';
 
           const infoContainer = document.createElement('div');
           infoContainer.className = 'flex flex-col overflow-hidden';
 
           const nameSpan = document.createElement('div');
-                    nameSpan.className = 'truncate font-medium text-gray-200 text-sm mb-1';
+          nameSpan.className =
+            'truncate font-medium text-gray-200 text-sm mb-1';
           nameSpan.textContent = file.name;
 
           const metaSpan = document.createElement('div');
@@ -52,7 +50,8 @@ document.addEventListener('DOMContentLoaded', () => {
           infoContainer.append(nameSpan, metaSpan);
 
           const removeBtn = document.createElement('button');
-                    removeBtn.className = 'ml-4 text-red-400 hover:text-red-300 flex-shrink-0';
+          removeBtn.className =
+            'ml-4 text-red-400 hover:text-red-300 flex-shrink-0';
           removeBtn.innerHTML = '<i data-lucide="trash-2" class="w-4 h-4"></i>';
           removeBtn.onclick = () => {
             state.files = state.files.filter((_, i) => i !== index);
@@ -95,16 +94,26 @@ document.addEventListener('DOMContentLoaded', () => {
 
       if (state.files.length === 1) {
         const originalFile = state.files[0];
-                console.log('[CSV2PDF] Converting single file:', originalFile.name, 'Size:', originalFile.size, 'bytes');
+        console.log(
+          '[CSV2PDF] Converting single file:',
+          originalFile.name,
+          'Size:',
+          originalFile.size,
+          'bytes'
+        );
 
         const pdfBlob = await convertCsvToPdf(originalFile, {
           onProgress: (percent, message) => {
             console.log(`[CSV2PDF] Progress: ${percent}% - ${message}`);
             showLoader(message, percent);
-                    }
+          },
         });
 
-                console.log('[CSV2PDF] Conversion complete! PDF size:', pdfBlob.size, 'bytes');
+        console.log(
+          '[CSV2PDF] Conversion complete! PDF size:',
+          pdfBlob.size,
+          'bytes'
+        );
 
         const fileName = originalFile.name.replace(/\.csv$/i, '') + '.pdf';
         downloadFile(pdfBlob, fileName);
@@ -126,16 +135,26 @@ document.addEventListener('DOMContentLoaded', () => {
 
         for (let i = 0; i < state.files.length; i++) {
           const file = state.files[i];
-                    console.log(`[CSV2PDF] Converting file ${i + 1}/${state.files.length}:`, file.name);
+          console.log(
+            `[CSV2PDF] Converting file ${i + 1}/${state.files.length}:`,
+            file.name
+          );
 
           const pdfBlob = await convertCsvToPdf(file, {
-                        onProgress: (percent, message) => {
+            onProgress: (percent) => {
-                            const overallPercent = ((i / state.files.length) * 100) + (percent / state.files.length);
+              const overallPercent =
-                            showLoader(`Converting ${i + 1}/${state.files.length}: ${file.name}...`, overallPercent);
+                (i / state.files.length) * 100 + percent / state.files.length;
-                        }
+              showLoader(
+                `Converting ${i + 1}/${state.files.length}: ${file.name}...`,
+                overallPercent
+              );
+            },
           });
 
-                    console.log(`[CSV2PDF] Converted ${file.name}, PDF size:`, pdfBlob.size);
+          console.log(
+            `[CSV2PDF] Converted ${file.name}, PDF size:`,
+            pdfBlob.size
+          );
 
           const baseName = file.name.replace(/\.csv$/i, '');
           const pdfBuffer = await pdfBlob.arrayBuffer();
@@ -158,13 +177,16 @@ document.addEventListener('DOMContentLoaded', () => {
           () => resetState()
         );
       }
-        } catch (e: any) {
+    } catch (e: unknown) {
       console.error('[CSV2PDF] ERROR:', e);
-            console.error('[CSV2PDF] Error stack:', e.stack);
+      console.error(
+        '[CSV2PDF] Error stack:',
+        e instanceof Error ? e.stack : ''
+      );
       hideLoader();
       showAlert(
         'Error',
-                `An error occurred during conversion. Error: ${e.message}`
+        `An error occurred during conversion. Error: ${e instanceof Error ? e.message : String(e)}`
       );
     }
   };
@@ -196,10 +218,12 @@ document.addEventListener('DOMContentLoaded', () => {
       dropZone.classList.remove('bg-gray-700');
       const files = e.dataTransfer?.files;
       if (files && files.length > 0) {
-                const csvFiles = Array.from(files).filter(f => f.name.toLowerCase().endsWith('.csv') || f.type === 'text/csv');
+        const csvFiles = Array.from(files).filter(
+          (f) => f.name.toLowerCase().endsWith('.csv') || f.type === 'text/csv'
+        );
         if (csvFiles.length > 0) {
           const dataTransfer = new DataTransfer();
-                    csvFiles.forEach(f => dataTransfer.items.add(f));
+          csvFiles.forEach((f) => dataTransfer.items.add(f));
           handleFileSelect(dataTransfer.files);
         }
       }

src/js/logic/decrypt-pdf-page.ts

@@ -170,7 +170,7 @@ async function decryptPdf() {
 
           zip.file(`unlocked-${file.name}`, decryptedBytes, { binary: true });
           successCount++;
-        } catch (fileError: any) {
+        } catch (fileError: unknown) {
           errorCount++;
           console.error(`Failed to decrypt ${file.name}:`, fileError);
         }
@@ -194,15 +194,16 @@ async function decryptPdf() {
         resetState();
       });
     }
-  } catch (error: any) {
+  } catch (error: unknown) {
     console.error('Error during PDF decryption:', error);
 
-    if (error.message === 'INVALID_PASSWORD') {
+    const errorMessage = error instanceof Error ? error.message : '';
+    if (errorMessage === 'INVALID_PASSWORD') {
       showAlert(
         'Incorrect Password',
         'The password you entered is incorrect. Please try again.'
       );
-    } else if (error.message?.includes('password')) {
+    } else if (errorMessage.includes('password')) {
       showAlert(
         'Password Error',
         'Unable to decrypt the PDF with the provided password.'
@@ -210,7 +211,7 @@ async function decryptPdf() {
     } else {
       showAlert(
         'Decryption Failed',
-        `An error occurred: ${error.message || 'The password you entered is wrong or the file is corrupted.'}`
+        `An error occurred: ${errorMessage || 'The password you entered is wrong or the file is corrupted.'}`
       );
     }
   } finally {

src/js/logic/delete-pages-page.ts

@@ -164,7 +164,7 @@ async function renderThumbnails() {
     canvas.width = viewport.width;
     canvas.height = viewport.height;
     const ctx = canvas.getContext('2d');
-    await page.render({ canvasContext: ctx, viewport }).promise;
+    await page.render({ canvas: null, canvasContext: ctx, viewport }).promise;
 
     const wrapper = document.createElement('div');
     wrapper.className = 'relative cursor-pointer group';

src/js/logic/deskew-pdf-page.ts

@@ -1,9 +1,10 @@
-import { isWasmAvailable, getWasmBaseUrl } from '../config/wasm-cdn-config.js';
+import { loadPyMuPDF } from '../utils/pymupdf-loader.js';
-import { showWasmRequiredDialog } from '../utils/wasm-provider.js';
+import type { PyMuPDFInstance } from '@/types';
-import { loadPyMuPDF, isPyMuPDFAvailable } from '../utils/pymupdf-loader.js';
 import { batchDecryptIfNeeded } from '../utils/password-prompt.js';
 import { createIcons, icons } from 'lucide';
 import { downloadFile } from '../utils/helpers';
+import { isWasmAvailable } from '../config/wasm-cdn-config.js';
+import { showWasmRequiredDialog } from '../utils/wasm-provider.js';
 
 interface DeskewResult {
   totalPages: number;
@@ -13,11 +14,11 @@ interface DeskewResult {
 }
 
 let selectedFiles: File[] = [];
-let pymupdf: any = null;
+let pymupdf: PyMuPDFInstance | null = null;
 
-async function initPyMuPDF(): Promise<any> {
+async function initPyMuPDF(): Promise<PyMuPDFInstance> {
   if (!pymupdf) {
-    pymupdf = await loadPyMuPDF();
+    pymupdf = (await loadPyMuPDF()) as PyMuPDFInstance;
   }
   return pymupdf;
 }

src/js/logic/digital-sign-pdf-page.ts

@@ -400,7 +400,7 @@ async function handleCertFile(file: File): Promise<void> {
           certStatus.className = 'text-xs text-green-400';
         }
       }
-    } catch (error) {
+    } catch {
       const certStatus = getElement<HTMLDivElement>('cert-status');
       if (certStatus) {
         certStatus.textContent = 'Failed to parse PEM file';

src/js/logic/duplicate-organize.ts

@@ -16,7 +16,9 @@ pdfjsLib.GlobalWorkerOptions.workerSrc = new URL(
   import.meta.url
 ).toString();
 
-const duplicateOrganizeState = {
+const duplicateOrganizeState: {
+  sortableInstances: { pageGrid?: Sortable };
+} = {
   sortableInstances: {},
 };
 
@@ -24,13 +26,10 @@ function initializePageGridSortable() {
   const grid = document.getElementById('page-grid');
   if (!grid) return;
 
-  // @ts-expect-error TS(2339) FIXME: Property 'pageGrid' does not exist on type '{}'.
   if (duplicateOrganizeState.sortableInstances.pageGrid) {
-    // @ts-expect-error TS(2339) FIXME: Property 'pageGrid' does not exist on type '{}'.
     duplicateOrganizeState.sortableInstances.pageGrid.destroy();
   }
 
-  // @ts-expect-error TS(2339) FIXME: Property 'pageGrid' does not exist on type '{}'.
   duplicateOrganizeState.sortableInstances.pageGrid = Sortable.create(grid, {
     animation: 150,
     ghostClass: 'sortable-ghost',
@@ -38,10 +37,10 @@ function initializePageGridSortable() {
     dragClass: 'sortable-drag',
     filter: '.duplicate-btn, .delete-btn',
     preventOnFilter: true,
-    onStart: function (evt: any) {
+    onStart: function (evt: Sortable.SortableEvent) {
       evt.item.style.opacity = '0.5';
     },
-    onEnd: function (evt: any) {
+    onEnd: function (evt: Sortable.SortableEvent) {
       evt.item.style.opacity = '1';
     },
   });
@@ -51,7 +50,7 @@ function initializePageGridSortable() {
  * Attaches event listeners for duplicate and delete to a page thumbnail element.
  * @param {HTMLElement} element The thumbnail element to attach listeners to.
  */
-function attachEventListeners(element: any) {
+function attachEventListeners(element: HTMLElement) {
   // Re-number all visible page labels
   const renumberPages = () => {
     const grid = document.getElementById('page-grid');
@@ -65,16 +64,16 @@ function attachEventListeners(element: any) {
   // Duplicate button listener
   element
     .querySelector('.duplicate-btn')
-    .addEventListener('click', (e: any) => {
+    .addEventListener('click', (e: Event) => {
       e.stopPropagation();
-      const clone = element.cloneNode(true);
+      const clone = element.cloneNode(true) as HTMLElement;
       element.after(clone);
       attachEventListeners(clone);
       renumberPages();
       initializePageGridSortable();
     });
 
-  element.querySelector('.delete-btn').addEventListener('click', (e: any) => {
+  element.querySelector('.delete-btn').addEventListener('click', (e: Event) => {
     e.stopPropagation();
     if (document.getElementById('page-grid').children.length > 1) {
       element.remove();
@@ -218,7 +217,7 @@ export async function processAndSave() {
     }
 
     const copiedPages = await newPdfDoc.copyPages(state.pdfDoc, finalIndices);
-    copiedPages.forEach((page: any) => newPdfDoc.addPage(page));
+    copiedPages.forEach((page) => newPdfDoc.addPage(page));
 
     const newPdfBytes = await newPdfDoc.save();
     downloadFile(

src/js/logic/edit-attachments-page.ts

@@ -44,7 +44,11 @@ worker.onmessage = function (e) {
   const data = e.data;
 
   if (data.status === 'success' && data.attachments !== undefined) {
-    pageState.allAttachments = data.attachments.map(function (att: any) {
+    pageState.allAttachments = data.attachments.map(function (att: {
+      data: ArrayBuffer;
+      filename: string;
+      description: string;
+    }) {
       return {
         ...att,
         data: new Uint8Array(att.data),

src/js/logic/edit-pdf-page.ts

@@ -11,8 +11,11 @@ const embedPdfWasmUrl = new URL(
   import.meta.url
 ).href;
 
-let viewerInstance: any = null;
+import type { EmbedPdfContainer } from 'embedpdf-snippet';
-let docManagerPlugin: any = null;
+import type { DocManagerPlugin } from '@/types';
+
+let viewerInstance: EmbedPdfContainer | null = null;
+let docManagerPlugin: DocManagerPlugin | null = null;
 let isViewerInitialized = false;
 const fileEntryMap = new Map<string, HTMLElement>();
 
@@ -148,14 +151,17 @@ async function handleFiles(files: FileList) {
       });
 
       const registry = await viewerInstance.registry;
-      docManagerPlugin = registry.getPlugin('document-manager').provides();
+      docManagerPlugin = registry
+        .getPlugin('document-manager')
+        .provides() as unknown as DocManagerPlugin;
 
-      docManagerPlugin.onDocumentClosed((data: any) => {
+      docManagerPlugin.onDocumentClosed((data: { id?: string }) => {
-        const docId = data?.id || data;
+        const docId = data?.id || '';
         removeFileEntry(docId);
       });
 
-      docManagerPlugin.onDocumentOpened((data: any) => {
+      docManagerPlugin.onDocumentOpened(
+        (data: { id?: string; name?: string }) => {
           const docId = data?.id;
           const docKey = data?.name;
           if (!docId) return;
@@ -174,7 +180,8 @@ async function handleFiles(files: FileList) {
               };
             }
           }
-      });
+        }
+      );
 
       addFileEntries(fileDisplayArea, decryptedFiles);
 

src/js/logic/email-to-pdf-page.ts

@@ -3,9 +3,7 @@ import { downloadFile, formatBytes } from '../utils/helpers.js';
 import { state } from '../state.js';
 import { createIcons, icons } from 'lucide';
 import { parseEmailFile, renderEmailToHtml } from './email-to-pdf.js';
-import { isWasmAvailable, getWasmBaseUrl } from '../config/wasm-cdn-config.js';
+import { loadPyMuPDF } from '../utils/pymupdf-loader.js';
-import { showWasmRequiredDialog } from '../utils/wasm-provider.js';
-import { loadPyMuPDF, isPyMuPDFAvailable } from '../utils/pymupdf-loader.js';
 
 const EXTENSIONS = ['.eml', '.msg'];
 const TOOL_NAME = 'Email';
@@ -125,7 +123,11 @@ document.addEventListener('DOMContentLoaded', () => {
           pageSize,
         });
 
-        const pdfBlob = await (pymupdf as any).htmlToPdf(htmlContent, {
+        const pdfBlob = await (
+          pymupdf as unknown as {
+            htmlToPdf: (html: string, options: unknown) => Promise<Blob>;
+          }
+        ).htmlToPdf(htmlContent, {
           pageSize,
           margins: { top: 50, right: 50, bottom: 50, left: 50 },
           attachments: email.attachments
@@ -166,7 +168,11 @@ document.addEventListener('DOMContentLoaded', () => {
               pageSize,
             });
 
-            const pdfBlob = await (pymupdf as any).htmlToPdf(htmlContent, {
+            const pdfBlob = await (
+              pymupdf as unknown as {
+                htmlToPdf: (html: string, options: unknown) => Promise<Blob>;
+              }
+            ).htmlToPdf(htmlContent, {
               pageSize,
               margins: { top: 50, right: 50, bottom: 50, left: 50 },
               attachments: email.attachments
@@ -179,7 +185,7 @@ document.addEventListener('DOMContentLoaded', () => {
             const baseName = file.name.replace(/\.[^.]+$/, '');
             const pdfBuffer = await pdfBlob.arrayBuffer();
             zip.file(`${baseName}.pdf`, pdfBuffer);
-          } catch (e: any) {
+          } catch (e: unknown) {
             console.error(`Failed to convert ${file.name}:`, e);
           }
         }
@@ -196,12 +202,12 @@ document.addEventListener('DOMContentLoaded', () => {
           () => resetState()
         );
       }
-    } catch (e: any) {
+    } catch (e: unknown) {
       console.error(`[${TOOL_NAME}2PDF] ERROR:`, e);
       hideLoader();
       showAlert(
         'Error',
-        `An error occurred during conversion. Error: ${e.message}`
+        `An error occurred during conversion. Error: ${e instanceof Error ? e.message : String(e)}`
       );
     }
   };

src/js/logic/email-to-pdf.ts

@@ -42,7 +42,14 @@ export async function parseEmlFile(file: File): Promise<ParsedEmail> {
     .filter(Boolean);
 
   // Helper to map parsing result to EmailAttachment
-  const mapAttachment = (att: any): EmailAttachment => {
+  interface RawAttachment {
+    content?: string | ArrayBuffer | Uint8Array;
+    filename?: string;
+    mimeType?: string;
+    contentId?: string;
+  }
+
+  const mapAttachment = (att: RawAttachment): EmailAttachment => {
     let content: Uint8Array | undefined;
     let size = 0;
     if (att.content) {
@@ -67,7 +74,9 @@ export async function parseEmlFile(file: File): Promise<ParsedEmail> {
 
   const attachments: EmailAttachment[] = [
     ...(email.attachments || []).map(mapAttachment),
-    ...((email as any).inline || []).map(mapAttachment),
+    ...((email as { inline?: RawAttachment[] }).inline || []).map(
+      mapAttachment
+    ),
   ];
 
   // Preserve original date string from headers
@@ -138,8 +147,16 @@ export async function parseMsgFile(file: File): Promise<ParsedEmail> {
     }
   }
 
+  interface MsgAttachment {
+    fileName?: string;
+    name?: string;
+    content?: ArrayLike<number>;
+    mimeType?: string;
+    pidContentId?: string;
+  }
+
   const attachments: EmailAttachment[] = (msgData.attachments || []).map(
-    (att: any) => ({
+    (att: MsgAttachment) => ({
       filename: att.fileName || att.name || 'unnamed',
       size: att.content?.length || 0,
       contentType: att.mimeType || 'application/octet-stream',

src/js/logic/encrypt-pdf-page.ts

@@ -6,7 +6,7 @@ import {
   readFileAsArrayBuffer,
 } from '../utils/helpers.js';
 import { icons, createIcons } from 'lucide';
-import { EncryptPdfState } from '@/types';
+import { EncryptPdfState, QpdfInstanceExtended } from '@/types';
 
 const pageState: EncryptPdfState = {
   file: null,
@@ -114,7 +114,7 @@ async function encryptPdf() {
 
   const inputPath = '/input.pdf';
   const outputPath = '/output.pdf';
-  let qpdf: any;
+  let qpdf: QpdfInstanceExtended;
 
   const loaderModal = document.getElementById('loader-modal');
   const loaderText = document.getElementById('loader-text');
@@ -154,10 +154,11 @@ async function encryptPdf() {
 
     try {
       qpdf.callMain(args);
-    } catch (qpdfError: any) {
+    } catch (qpdfError: unknown) {
       console.error('qpdf execution error:', qpdfError);
       throw new Error(
-        'Encryption failed: ' + (qpdfError.message || 'Unknown error'),
+        'Encryption failed: ' +
+          (qpdfError instanceof Error ? qpdfError.message : 'Unknown error'),
         { cause: qpdfError }
       );
     }
@@ -169,7 +170,9 @@ async function encryptPdf() {
       throw new Error('Encryption resulted in an empty file.');
     }
 
-    const blob = new Blob([outputFile], { type: 'application/pdf' });
+    const blob = new Blob([new Uint8Array(outputFile)], {
+      type: 'application/pdf',
+    });
     downloadFile(blob, `encrypted-${pageState.file.name}`);
 
     if (loaderModal) loaderModal.classList.add('hidden');
@@ -183,12 +186,12 @@ async function encryptPdf() {
     showAlert('Success', successMessage, 'success', () => {
       resetState();
     });
-  } catch (error: any) {
+  } catch (error: unknown) {
     console.error('Error during PDF encryption:', error);
     if (loaderModal) loaderModal.classList.add('hidden');
     showAlert(
       'Encryption Failed',
-      `An error occurred: ${error.message || 'The PDF might be corrupted.'}`
+      `An error occurred: ${error instanceof Error ? error.message : 'The PDF might be corrupted.'}`
     );
   } finally {
     try {

src/js/logic/epub-to-pdf-page.ts

@@ -2,9 +2,7 @@ import { showLoader, hideLoader, showAlert } from '../ui.js';
 import { downloadFile, formatBytes } from '../utils/helpers.js';
 import { state } from '../state.js';
 import { createIcons, icons } from 'lucide';
-import { isWasmAvailable, getWasmBaseUrl } from '../config/wasm-cdn-config.js';
+import { loadPyMuPDF } from '../utils/pymupdf-loader.js';
-import { showWasmRequiredDialog } from '../utils/wasm-provider.js';
-import { loadPyMuPDF, isPyMuPDFAvailable } from '../utils/pymupdf-loader.js';
 
 const FILETYPE = 'epub';
 const EXTENSIONS = ['.epub'];
@@ -145,12 +143,12 @@ document.addEventListener('DOMContentLoaded', () => {
           () => resetState()
         );
       }
-    } catch (e: any) {
+    } catch (e: unknown) {
       console.error(`[${TOOL_NAME}2PDF] ERROR:`, e);
       hideLoader();
       showAlert(
         'Error',
-        `An error occurred during conversion. Error: ${e.message}`
+        `An error occurred during conversion. Error: ${e instanceof Error ? e.message : String(e)}`
       );
     }
   };

src/js/logic/excel-to-pdf-page.ts

@@ -1,12 +1,11 @@
 import { showLoader, hideLoader, showAlert } from '../ui.js';
-import {
+import { downloadFile, formatBytes } from '../utils/helpers.js';
-    downloadFile,
-    readFileAsArrayBuffer,
-    formatBytes,
-} from '../utils/helpers.js';
 import { state } from '../state.js';
 import { createIcons, icons } from 'lucide';
-import { getLibreOfficeConverter, type LoadProgress } from '../utils/libreoffice-loader.js';
+import {
+  getLibreOfficeConverter,
+  type LoadProgress,
+} from '../utils/libreoffice-loader.js';
 
 document.addEventListener('DOMContentLoaded', () => {
   state.files = [];
@@ -37,13 +36,15 @@ document.addEventListener('DOMContentLoaded', () => {
         for (let index = 0; index < state.files.length; index++) {
           const file = state.files[index];
           const fileDiv = document.createElement('div');
-                    fileDiv.className = 'flex items-center justify-between bg-gray-700 p-3 rounded-lg text-sm';
+          fileDiv.className =
+            'flex items-center justify-between bg-gray-700 p-3 rounded-lg text-sm';
 
           const infoContainer = document.createElement('div');
           infoContainer.className = 'flex flex-col overflow-hidden';
 
           const nameSpan = document.createElement('div');
-                    nameSpan.className = 'truncate font-medium text-gray-200 text-sm mb-1';
+          nameSpan.className =
+            'truncate font-medium text-gray-200 text-sm mb-1';
           nameSpan.textContent = file.name;
 
           const metaSpan = document.createElement('div');
@@ -53,7 +54,8 @@ document.addEventListener('DOMContentLoaded', () => {
           infoContainer.append(nameSpan, metaSpan);
 
           const removeBtn = document.createElement('button');
-                    removeBtn.className = 'ml-4 text-red-400 hover:text-red-300 flex-shrink-0';
+          removeBtn.className =
+            'ml-4 text-red-400 hover:text-red-300 flex-shrink-0';
           removeBtn.innerHTML = '<i data-lucide="trash-2" class="w-4 h-4"></i>';
           removeBtn.onclick = () => {
             state.files = state.files.filter((_, i) => i !== index);
@@ -103,7 +105,8 @@ document.addEventListener('DOMContentLoaded', () => {
 
         const pdfBlob = await converter.convertToPdf(originalFile);
 
-                const fileName = originalFile.name.replace(/\.(xls|xlsx|ods|csv)$/i, '') + '.pdf';
+        const fileName =
+          originalFile.name.replace(/\.(xls|xlsx|ods|csv)$/i, '') + '.pdf';
 
         downloadFile(pdfBlob, fileName);
 
@@ -122,7 +125,9 @@ document.addEventListener('DOMContentLoaded', () => {
 
         for (let i = 0; i < state.files.length; i++) {
           const file = state.files[i];
-                    showLoader(`Converting ${i + 1}/${state.files.length}: ${file.name}...`);
+          showLoader(
+            `Converting ${i + 1}/${state.files.length}: ${file.name}...`
+          );
 
           const pdfBlob = await converter.convertToPdf(file);
 
@@ -144,11 +149,11 @@ document.addEventListener('DOMContentLoaded', () => {
           () => resetState()
         );
       }
-        } catch (e: any) {
+    } catch (e: unknown) {
       hideLoader();
       showAlert(
         'Error',
-                `An error occurred during conversion. Error: ${e.message}`
+        `An error occurred during conversion. Error: ${e instanceof Error ? e.message : String(e)}`
       );
     }
   };
@@ -180,13 +185,18 @@ document.addEventListener('DOMContentLoaded', () => {
       dropZone.classList.remove('bg-gray-700');
       const files = e.dataTransfer?.files;
       if (files && files.length > 0) {
-                const excelFiles = Array.from(files).filter(f => {
+        const excelFiles = Array.from(files).filter((f) => {
           const name = f.name.toLowerCase();
-                    return name.endsWith('.xls') || name.endsWith('.xlsx') || name.endsWith('.ods') || name.endsWith('.csv');
+          return (
+            name.endsWith('.xls') ||
+            name.endsWith('.xlsx') ||
+            name.endsWith('.ods') ||
+            name.endsWith('.csv')
+          );
         });
         if (excelFiles.length > 0) {
           const dataTransfer = new DataTransfer();
-                    excelFiles.forEach(f => dataTransfer.items.add(f));
+          excelFiles.forEach((f) => dataTransfer.items.add(f));
           handleFileSelect(dataTransfer.files);
         }
       }

src/js/logic/extract-images-page.ts

@@ -8,9 +8,7 @@ import {
 } from '../utils/helpers.js';
 import { state } from '../state.js';
 import { createIcons, icons } from 'lucide';
-import { isWasmAvailable, getWasmBaseUrl } from '../config/wasm-cdn-config.js';
+import { loadPyMuPDF } from '../utils/pymupdf-loader.js';
-import { showWasmRequiredDialog } from '../utils/wasm-provider.js';
-import { loadPyMuPDF, isPyMuPDFAvailable } from '../utils/pymupdf-loader.js';
 import { batchDecryptIfNeeded } from '../utils/password-prompt.js';
 
 interface ExtractedImage {
@@ -88,7 +86,7 @@ document.addEventListener('DOMContentLoaded', () => {
           const arrayBuffer = await readFileAsArrayBuffer(file);
           const pdfDoc = await getPDFDocument({ data: arrayBuffer }).promise;
           metaSpan.textContent = `${formatBytes(file.size)} • ${pdfDoc.numPages} pages`;
-        } catch (error) {
+        } catch {
           metaSpan.textContent = `${formatBytes(file.size)} • Could not load page count`;
         }
       }
@@ -118,7 +116,7 @@ document.addEventListener('DOMContentLoaded', () => {
     if (!imagesGrid || !imagesContainer) return;
     imagesGrid.innerHTML = '';
 
-    extractedImages.forEach((img, index) => {
+    extractedImages.forEach((img) => {
       const blob = new Blob([new Uint8Array(img.data)]);
       const url = URL.createObjectURL(blob);
 
@@ -212,11 +210,11 @@ document.addEventListener('DOMContentLoaded', () => {
           'success'
         );
       }
-    } catch (e: any) {
+    } catch (e: unknown) {
       hideLoader();
       showAlert(
         'Error',
-        `An error occurred during extraction. Error: ${e.message}`
+        `An error occurred during extraction. Error: ${e instanceof Error ? e.message : String(e)}`
       );
     }
   };

src/js/logic/extract-pages-page.ts

@@ -12,7 +12,7 @@ import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
 interface ExtractState {
   file: File | null;
-  pdfDoc: any;
+  pdfDoc: PDFDocument | null;
   totalPages: number;
 }
 

src/js/logic/extract-tables-page.ts

@@ -2,9 +2,7 @@ import { showLoader, hideLoader, showAlert } from '../ui.js';
 import { downloadFile, formatBytes } from '../utils/helpers.js';
 import { createIcons, icons } from 'lucide';
 import JSZip from 'jszip';
-import { isWasmAvailable, getWasmBaseUrl } from '../config/wasm-cdn-config.js';
+import { loadPyMuPDF } from '../utils/pymupdf-loader.js';
-import { showWasmRequiredDialog } from '../utils/wasm-provider.js';
-import { loadPyMuPDF, isPyMuPDFAvailable } from '../utils/pymupdf-loader.js';
 import { loadPdfWithPasswordPrompt } from '../utils/password-prompt.js';
 let file: File | null = null;
 

src/js/logic/fb2-to-pdf-page.ts

@@ -2,9 +2,7 @@ import { showLoader, hideLoader, showAlert } from '../ui.js';
 import { downloadFile, formatBytes } from '../utils/helpers.js';
 import { state } from '../state.js';
 import { createIcons, icons } from 'lucide';
-import { isWasmAvailable, getWasmBaseUrl } from '../config/wasm-cdn-config.js';
+import { loadPyMuPDF } from '../utils/pymupdf-loader.js';
-import { showWasmRequiredDialog } from '../utils/wasm-provider.js';
-import { loadPyMuPDF, isPyMuPDFAvailable } from '../utils/pymupdf-loader.js';
 
 const FILETYPE = 'fb2';
 const EXTENSIONS = ['.fb2'];
@@ -141,12 +139,12 @@ document.addEventListener('DOMContentLoaded', () => {
           () => resetState()
         );
       }
-    } catch (e: any) {
+    } catch (e: unknown) {
       console.error(`[${TOOL_NAME}2PDF] ERROR:`, e);
       hideLoader();
       showAlert(
         'Error',
-        `An error occurred during conversion. Error: ${e.message}`
+        `An error occurred during conversion. Error: ${e instanceof Error ? e.message : String(e)}`
       );
     }
   };

src/js/logic/form-creator.ts

@@ -28,7 +28,7 @@ type PdfViewerWindow = Window & {
 };
 
 import { initializeGlobalShortcuts } from '../utils/shortcuts-init.js';
-import { downloadFile, hexToRgb, getPDFDocument } from '../utils/helpers.js';
+import { downloadFile, hexToRgb } from '../utils/helpers.js';
 import { loadPdfWithPasswordPrompt } from '../utils/password-prompt.js';
 import { createIcons, icons } from 'lucide';
 import * as pdfjsLib from 'pdfjs-dist';
@@ -319,15 +319,15 @@ toolItems.forEach((item) => {
   let touchStartY = 0;
   let isTouchDragging = false;
 
-  item.addEventListener('touchstart', (e) => {
+  item.addEventListener('touchstart', (e: TouchEvent) => {
     const touch = e.touches[0];
     touchStartX = touch.clientX;
     touchStartY = touch.clientY;
     isTouchDragging = false;
   });
 
-  item.addEventListener('touchmove', (e) => {
+  item.addEventListener('touchmove', (e: TouchEvent) => {
-    e.preventDefault(); // Prevent scrolling while dragging
+    e.preventDefault();
     const touch = e.touches[0];
     const moveX = Math.abs(touch.clientX - touchStartX);
     const moveY = Math.abs(touch.clientY - touchStartY);
@@ -338,7 +338,7 @@ toolItems.forEach((item) => {
     }
   });
 
-  item.addEventListener('touchend', (e) => {
+  item.addEventListener('touchend', (e: TouchEvent) => {
     e.preventDefault();
     if (!isTouchDragging) {
       // It was a tap, treat as click
@@ -2131,8 +2131,7 @@ downloadBtn.addEventListener('click', async () => {
     nameCount.set(field.name, count + 1);
 
     if (existingFieldNames.has(field.name)) {
-      if (field.type === 'radio' && existingRadioGroups.has(field.name)) {
+      if (!(field.type === 'radio' && existingRadioGroups.has(field.name))) {
-      } else {
         conflictsWithPdf.push(field.name);
       }
     }
@@ -2337,7 +2336,7 @@ downloadBtn.addEventListener('click', async () => {
           const existingField = form.getFieldMaybe(groupName);
 
           if (existingField) {
-            radioGroup = existingField;
+            radioGroup = existingField as PDFRadioGroup;
             radioGroups.set(groupName, radioGroup);
             console.log(`Using existing radio group from PDF: ${groupName}`);
           } else {
@@ -2788,11 +2787,11 @@ function getPageDimensions(size: string): { width: number; height: number } {
     case 'a3':
       dimensions = PageSizes.A3;
       break;
-    case 'custom':
+    case 'custom': {
-      // Get custom dimensions from inputs
       const width = parseInt(customWidth.value) || 612;
       const height = parseInt(customHeight.value) || 792;
       return { width, height };
+    }
     default:
       dimensions = PageSizes.Letter;
   }

src/js/logic/image-to-pdf-page.ts

@@ -1,9 +1,8 @@
 import { createIcons, icons } from 'lucide';
 import { showAlert, showLoader, hideLoader } from '../ui.js';
 import { downloadFile, formatBytes } from '../utils/helpers.js';
-import { isWasmAvailable, getWasmBaseUrl } from '../config/wasm-cdn-config.js';
+import { loadPyMuPDF } from '../utils/pymupdf-loader.js';
-import { showWasmRequiredDialog } from '../utils/wasm-provider.js';
+import type { PyMuPDFInstance } from '@/types';
-import { loadPyMuPDF, isPyMuPDFAvailable } from '../utils/pymupdf-loader.js';
 import heic2any from 'heic2any';
 import {
   getSelectedQuality,
@@ -16,7 +15,7 @@ const SUPPORTED_FORMATS_DISPLAY =
   'JPG, PNG, BMP, GIF, TIFF, PNM, PGM, PBM, PPM, PAM, JXR, JPX, JP2, PSD, SVG, HEIC, WebP';
 
 let files: File[] = [];
-let pymupdf: any = null;
+let pymupdf: PyMuPDFInstance | null = null;
 
 if (document.readyState === 'loading') {
   document.addEventListener('DOMContentLoaded', initializePage);
@@ -177,9 +176,9 @@ function updateUI() {
   }
 }
 
-async function ensurePyMuPDF(): Promise<any> {
+async function ensurePyMuPDF(): Promise<PyMuPDFInstance> {
   if (!pymupdf) {
-    pymupdf = await loadPyMuPDF();
+    pymupdf = (await loadPyMuPDF()) as PyMuPDFInstance;
   }
   return pymupdf;
 }
@@ -274,7 +273,7 @@ async function convertToPdf() {
         const processed = await preprocessFile(file);
         const compressed = await compressImageFile(processed, quality);
         processedFiles.push(compressed);
-      } catch (error: any) {
+      } catch (error: unknown) {
         console.warn(error);
         throw error;
       }
@@ -291,11 +290,11 @@ async function convertToPdf() {
     showAlert('Success', 'PDF created successfully!', 'success', () => {
       resetState();
     });
-  } catch (e: any) {
+  } catch (e: unknown) {
     console.error('[ImageToPDF]', e);
     showAlert(
       'Conversion Error',
-      e.message || 'Failed to convert images to PDF.'
+      e instanceof Error ? e.message : 'Failed to convert images to PDF.'
     );
   } finally {
     hideLoader();

src/js/logic/index.ts

@@ -1,81 +1,18 @@
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-import { pdfToMarkdown } from './pdf-to-markdown.js';
-import { repairPdf } from './repair-pdf.js';
-
-
 // import { mdToPdf } from './md-to-pdf.js';
 
-
-
-
-
-
-
 import { processAndSave } from './duplicate-organize.js';
 
-
-
-
-
-
-import { wordToPdf } from './word-to-pdf.js';
-
 import { setupCropperTool } from './cropper.js';
 
-
+export const toolLogic: Record<
-
+  string,
-
+  | {
-
+      process?: (...args: unknown[]) => Promise<unknown>;
-
+      setup?: (...args: unknown[]) => Promise<unknown>;
-
+    }
-
+  | ((...args: unknown[]) => unknown)
-
+> = {
-export const toolLogic = {
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
   'duplicate-organize': { process: processAndSave },
 
-
-
-
-
-
-
   cropper: { setup: setupCropperTool },
-
-
 };
-

src/js/logic/jpg-to-pdf-page.ts

@@ -2,6 +2,7 @@ import { createIcons, icons } from 'lucide';
 import { showAlert, showLoader, hideLoader } from '../ui.js';
 import { downloadFile, formatBytes } from '../utils/helpers.js';
 import { loadPyMuPDF } from '../utils/pymupdf-loader.js';
+import type { PyMuPDFInstance } from '@/types';
 import {
   getSelectedQuality,
   compressImageFile,
@@ -11,7 +12,7 @@ const SUPPORTED_FORMATS = '.jpg,.jpeg,.jp2,.jpx';
 const SUPPORTED_MIME_TYPES = ['image/jpeg', 'image/jpg', 'image/jp2'];
 
 let files: File[] = [];
-let pymupdf: any = null;
+let pymupdf: PyMuPDFInstance | null = null;
 
 if (document.readyState === 'loading') {
   document.addEventListener('DOMContentLoaded', initializePage);
@@ -168,9 +169,9 @@ function updateUI() {
   }
 }
 
-async function ensurePyMuPDF(): Promise<any> {
+async function ensurePyMuPDF(): Promise<PyMuPDFInstance> {
   if (!pymupdf) {
-    pymupdf = await loadPyMuPDF();
+    pymupdf = (await loadPyMuPDF()) as PyMuPDFInstance;
   }
   return pymupdf;
 }
@@ -200,11 +201,11 @@ async function convertToPdf() {
     showAlert('Success', 'PDF created successfully!', 'success', () => {
       resetState();
     });
-  } catch (e: any) {
+  } catch (e: unknown) {
     console.error('[JpgToPdf]', e);
     showAlert(
       'Conversion Error',
-      e.message || 'Failed to convert images to PDF.'
+      e instanceof Error ? e.message : 'Failed to convert images to PDF.'
     );
   } finally {
     hideLoader();

src/js/logic/linearize-pdf-page.ts

@@ -8,7 +8,7 @@ import {
 import { icons, createIcons } from 'lucide';
 import JSZip from 'jszip';
 import { deduplicateFileName } from '../utils/deduplicate-filename.js';
-import { LinearizePdfState } from '@/types';
+import { LinearizePdfState, QpdfInstanceExtended } from '@/types';
 
 const pageState: LinearizePdfState = {
   files: [],
@@ -111,7 +111,7 @@ async function linearizePdf() {
 
   const zip = new JSZip();
   const usedNames = new Set<string>();
-  let qpdf: any;
+  let qpdf: QpdfInstanceExtended;
   let successCount = 0;
   let errorCount = 0;
 
@@ -150,7 +150,7 @@ async function linearizePdf() {
         );
         zip.file(zipEntryName, outputFile, { binary: true });
         successCount++;
-      } catch (fileError: any) {
+      } catch (fileError: unknown) {
         errorCount++;
         console.error(`Failed to linearize ${file.name}:`, fileError);
       } finally {
@@ -187,11 +187,11 @@ async function linearizePdf() {
     showAlert('Processing Complete', alertMessage, 'success', () => {
       resetState();
     });
-  } catch (error: any) {
+  } catch (error: unknown) {
     console.error('Linearization process error:', error);
     showAlert(
       'Linearization Failed',
-      `An error occurred: ${error.message || 'Unknown error'}.`
+      `An error occurred: ${error instanceof Error ? error.message : 'Unknown error'}.`
     );
   } finally {
     if (loaderModal) loaderModal.classList.add('hidden');

src/js/logic/merge-pdf-page.ts

@@ -16,15 +16,15 @@ import {
 import { createIcons, icons } from 'lucide';
 import * as pdfjsLib from 'pdfjs-dist';
 import Sortable from 'sortablejs';
+import type { MergeJob, MergeFile, MergeMessage, MergeResponse } from '@/types';
 
-// @ts-ignore
 pdfjsLib.GlobalWorkerOptions.workerSrc = new URL(
   'pdfjs-dist/build/pdf.worker.min.mjs',
   import.meta.url
 ).toString();
 
 interface MergeState {
-  pdfDocs: Record<string, any>;
+  pdfDocs: Record<string, pdfjsLib.PDFDocumentProxy>;
   pdfBytes: Record<string, ArrayBuffer>;
   activeMode: 'file' | 'page';
   sortableInstances: {
@@ -66,10 +66,10 @@ function initializeFileListSortable() {
     ghostClass: 'sortable-ghost',
     chosenClass: 'sortable-chosen',
     dragClass: 'sortable-drag',
-    onStart: function (evt: any) {
+    onStart: function (evt: Sortable.SortableEvent) {
       evt.item.style.opacity = '0.5';
     },
-    onEnd: function (evt: any) {
+    onEnd: function (evt: Sortable.SortableEvent) {
       evt.item.style.opacity = '1';
     },
   });
@@ -88,10 +88,10 @@ function initializePageThumbnailsSortable() {
     ghostClass: 'sortable-ghost',
     chosenClass: 'sortable-chosen',
     dragClass: 'sortable-drag',
-    onStart: function (evt: any) {
+    onStart: function (evt: Sortable.SortableEvent) {
       evt.item.style.opacity = '0.5';
     },
-    onEnd: function (evt: any) {
+    onEnd: function (evt: Sortable.SortableEvent) {
       evt.item.style.opacity = '1';
     },
   });
@@ -201,7 +201,7 @@ async function renderPageMergeThumbnails() {
           batchSize: 8,
           useLazyLoading: true,
           lazyLoadMargin: '300px',
-          onProgress: (current, total) => {
+          onProgress: () => {
             currentPageNumber++;
             showLoader(`Rendering page previews...`);
           },
@@ -288,9 +288,7 @@ export async function merge() {
 
   showLoader('Merging PDFs...');
   try {
-    // @ts-ignore
     const jobs: MergeJob[] = [];
-    // @ts-ignore
     const filesToMerge: MergeFile[] = [];
     const uniqueFileNames = new Set<string>();
 
@@ -387,7 +385,6 @@ export async function merge() {
       }
     }
 
-    // @ts-ignore
     const message: MergeMessage = {
       command: 'merge',
       files: filesToMerge,
@@ -400,7 +397,6 @@ export async function merge() {
       filesToMerge.map((f) => f.data)
     );
 
-    // @ts-ignore
     mergeWorker.onmessage = (e: MessageEvent<MergeResponse>) => {
       hideLoader();
       if (e.data.status === 'success') {

src/js/logic/mobi-to-pdf-page.ts

@@ -2,9 +2,7 @@ import { showLoader, hideLoader, showAlert } from '../ui.js';
 import { downloadFile, formatBytes } from '../utils/helpers.js';
 import { state } from '../state.js';
 import { createIcons, icons } from 'lucide';
-import { isWasmAvailable, getWasmBaseUrl } from '../config/wasm-cdn-config.js';
+import { loadPyMuPDF } from '../utils/pymupdf-loader.js';
-import { showWasmRequiredDialog } from '../utils/wasm-provider.js';
-import { loadPyMuPDF, isPyMuPDFAvailable } from '../utils/pymupdf-loader.js';
 
 const FILETYPE = 'mobi';
 const EXTENSIONS = ['.mobi'];
@@ -141,12 +139,12 @@ document.addEventListener('DOMContentLoaded', () => {
           () => resetState()
         );
       }
-    } catch (e: any) {
+    } catch (e: unknown) {
       console.error(`[${TOOL_NAME}2PDF] ERROR:`, e);
       hideLoader();
       showAlert(
         'Error',
-        `An error occurred during conversion. Error: ${e.message}`
+        `An error occurred during conversion. Error: ${e instanceof Error ? e.message : String(e)}`
       );
     }
   };

src/js/logic/odt-to-pdf-page.ts

@@ -1,12 +1,11 @@
 import { showLoader, hideLoader, showAlert } from '../ui.js';
-import {
+import { downloadFile, formatBytes } from '../utils/helpers.js';
-    downloadFile,
-    readFileAsArrayBuffer,
-    formatBytes,
-} from '../utils/helpers.js';
 import { state } from '../state.js';
 import { createIcons, icons } from 'lucide';
-import { getLibreOfficeConverter, type LoadProgress } from '../utils/libreoffice-loader.js';
+import {
+  getLibreOfficeConverter,
+  type LoadProgress,
+} from '../utils/libreoffice-loader.js';
 
 document.addEventListener('DOMContentLoaded', () => {
   state.files = [];
@@ -37,13 +36,15 @@ document.addEventListener('DOMContentLoaded', () => {
         for (let index = 0; index < state.files.length; index++) {
           const file = state.files[index];
           const fileDiv = document.createElement('div');
-                    fileDiv.className = 'flex items-center justify-between bg-gray-700 p-3 rounded-lg text-sm';
+          fileDiv.className =
+            'flex items-center justify-between bg-gray-700 p-3 rounded-lg text-sm';
 
           const infoContainer = document.createElement('div');
           infoContainer.className = 'flex flex-col overflow-hidden';
 
           const nameSpan = document.createElement('div');
-                    nameSpan.className = 'truncate font-medium text-gray-200 text-sm mb-1';
+          nameSpan.className =
+            'truncate font-medium text-gray-200 text-sm mb-1';
           nameSpan.textContent = file.name;
 
           const metaSpan = document.createElement('div');
@@ -53,7 +54,8 @@ document.addEventListener('DOMContentLoaded', () => {
           infoContainer.append(nameSpan, metaSpan);
 
           const removeBtn = document.createElement('button');
-                    removeBtn.className = 'ml-4 text-red-400 hover:text-red-300 flex-shrink-0';
+          removeBtn.className =
+            'ml-4 text-red-400 hover:text-red-300 flex-shrink-0';
           removeBtn.innerHTML = '<i data-lucide="trash-2" class="w-4 h-4"></i>';
           removeBtn.onclick = () => {
             state.files = state.files.filter((_, i) => i !== index);
@@ -122,7 +124,9 @@ document.addEventListener('DOMContentLoaded', () => {
 
         for (let i = 0; i < state.files.length; i++) {
           const file = state.files[i];
-                    showLoader(`Converting ${i + 1}/${state.files.length}: ${file.name}...`);
+          showLoader(
+            `Converting ${i + 1}/${state.files.length}: ${file.name}...`
+          );
 
           const pdfBlob = await converter.convertToPdf(file);
 
@@ -144,11 +148,11 @@ document.addEventListener('DOMContentLoaded', () => {
           () => resetState()
         );
       }
-        } catch (e: any) {
+    } catch (e: unknown) {
       hideLoader();
       showAlert(
         'Error',
-                `An error occurred during conversion. Error: ${e.message}`
+        `An error occurred during conversion. Error: ${e instanceof Error ? e.message : String(e)}`
       );
     }
   };
@@ -180,10 +184,14 @@ document.addEventListener('DOMContentLoaded', () => {
       dropZone.classList.remove('bg-gray-700');
       const files = e.dataTransfer?.files;
       if (files && files.length > 0) {
-                const odtFiles = Array.from(files).filter(f => f.name.toLowerCase().endsWith('.odt') || f.type === 'application/vnd.oasis.opendocument.text');
+        const odtFiles = Array.from(files).filter(
+          (f) =>
+            f.name.toLowerCase().endsWith('.odt') ||
+            f.type === 'application/vnd.oasis.opendocument.text'
+        );
         if (odtFiles.length > 0) {
           const dataTransfer = new DataTransfer();
-                    odtFiles.forEach(f => dataTransfer.items.add(f));
+          odtFiles.forEach((f) => dataTransfer.items.add(f));
           handleFileSelect(dataTransfer.files);
         }
       }

src/js/logic/organize-pdf-page.ts

@@ -15,10 +15,10 @@ pdfjsLib.GlobalWorkerOptions.workerSrc = new URL(
 
 interface OrganizeState {
   file: File | null;
-  pdfDoc: any;
+  pdfDoc: PDFDocument | null;
-  pdfJsDoc: any;
+  pdfJsDoc: pdfjsLib.PDFDocumentProxy | null;
   totalPages: number;
-  sortableInstance: any;
+  sortableInstance: Sortable | null;
 }
 
 const organizeState: OrganizeState = {
@@ -282,7 +282,7 @@ async function renderThumbnails() {
     canvas.width = viewport.width;
     canvas.height = viewport.height;
     const ctx = canvas.getContext('2d');
-    await page.render({ canvasContext: ctx, viewport }).promise;
+    await page.render({ canvas: null, canvasContext: ctx, viewport }).promise;
 
     const wrapper = document.createElement('div');
     wrapper.className =

src/js/logic/pages-to-pdf-page.ts

@@ -150,12 +150,12 @@ document.addEventListener('DOMContentLoaded', () => {
           () => resetState()
         );
       }
-    } catch (e: any) {
+    } catch (e: unknown) {
       hideLoader();
       console.error(`[${FILETYPE_NAME}ToPDF] Error:`, e);
       showAlert(
         'Error',
-        `An error occurred during conversion. Error: ${e.message}`
+        `An error occurred during conversion. Error: ${e instanceof Error ? e.message : String(e)}`
       );
     }
   };

src/js/logic/pdf-booklet-page.ts

@@ -226,9 +226,9 @@ async function generatePreview() {
       const ctx = offscreen.getContext('2d')!;
 
       await page.render({
-        canvasContext: ctx as any,
+        canvasContext: ctx as unknown as CanvasRenderingContext2D,
         viewport: viewport,
-        canvas: offscreen as any,
+        canvas: offscreen as unknown as HTMLCanvasElement,
       }).promise;
 
       const bitmap = await createImageBitmap(offscreen);

src/js/logic/pdf-layers-page.ts

@@ -7,9 +7,7 @@ import {
   getPDFDocument,
 } from '../utils/helpers.js';
 import { createIcons, icons } from 'lucide';
-import { isWasmAvailable, getWasmBaseUrl } from '../config/wasm-cdn-config.js';
+import { loadPyMuPDF } from '../utils/pymupdf-loader.js';
-import { showWasmRequiredDialog } from '../utils/wasm-provider.js';
-import { loadPyMuPDF, isPyMuPDFAvailable } from '../utils/pymupdf-loader.js';
 import { loadPdfWithPasswordPrompt } from '../utils/password-prompt.js';
 
 interface LayerData {
@@ -24,7 +22,21 @@ interface LayerData {
 }
 
 let currentFile: File | null = null;
-let currentDoc: any = null;
+interface PyMuPDFDocument {
+  getLayerConfig: () => LayerData[];
+  addLayer: (name: string) => { number: number; xref: number };
+  setLayerConfig: (layers: LayerData[]) => void;
+  setLayerVisibility: (xref: number, visible: boolean) => void;
+  deleteOCG: (xref: number) => void;
+  addOCGWithParent: (
+    name: string,
+    parentXref: number
+  ) => { number: number; xref: number };
+  addOCG: (name: string) => { number: number; xref: number };
+  save: () => Uint8Array;
+}
+
+let currentDoc: PyMuPDFDocument | null = null;
 const layersMap = new Map<number, LayerData>();
 let nextDisplayOrder = 0;
 
@@ -274,7 +286,7 @@ document.addEventListener('DOMContentLoaded', () => {
         if (!childName || !childName.trim()) return;
 
         try {
-          const childXref = currentDoc.addOCGWithParent(
+          const childResult = currentDoc.addOCGWithParent(
             childName.trim(),
             parentXref
           );
@@ -285,9 +297,9 @@ document.addEventListener('DOMContentLoaded', () => {
             }
           });
 
-          layersMap.set(childXref, {
+          layersMap.set(childResult.xref, {
-            number: childXref,
+            number: childResult.number,
-            xref: childXref,
+            xref: childResult.xref,
             text: childName.trim(),
             on: true,
             locked: false,
@@ -316,16 +328,17 @@ document.addEventListener('DOMContentLoaded', () => {
       const pymupdf = await loadPyMuPDF();
 
       showLoader(`Loading layers from ${currentFile.name}...`);
-      currentDoc = await pymupdf.open(currentFile);
+      currentDoc = await (
+        pymupdf as { open: (file: File) => Promise<PyMuPDFDocument> }
+      ).open(currentFile);
 
       showLoader('Reading layer configuration...');
       const existingLayers = currentDoc.getLayerConfig();
 
-      // Reset and populate layers map
       layersMap.clear();
       nextDisplayOrder = 0;
 
-      existingLayers.forEach((layer: any) => {
+      existingLayers.forEach((layer: LayerData) => {
         layersMap.set(layer.number, {
           number: layer.number,
           xref: layer.xref ?? layer.number,
@@ -350,9 +363,12 @@ document.addEventListener('DOMContentLoaded', () => {
 
       renderLayers();
       setupLayerHandlers();
-    } catch (error: any) {
+    } catch (error: unknown) {
       hideLoader();
-      showAlert('Error', error.message || 'Failed to load PDF layers');
+      showAlert(
+        'Error',
+        error instanceof Error ? error.message : 'Failed to load PDF layers'
+      );
       console.error('Layers error:', error);
     }
   };
@@ -373,13 +389,13 @@ document.addEventListener('DOMContentLoaded', () => {
         }
 
         try {
-          const xref = currentDoc.addOCG(name);
+          const layerResult = currentDoc.addOCG(name);
           newLayerInput.value = '';
 
           const newDisplayOrder = nextDisplayOrder++;
-          layersMap.set(xref, {
+          layersMap.set(layerResult.xref, {
-            number: xref,
+            number: layerResult.number,
-            xref: xref,
+            xref: layerResult.xref,
             text: name,
             on: true,
             locked: false,
@@ -389,8 +405,12 @@ document.addEventListener('DOMContentLoaded', () => {
           });
 
           renderLayers();
-        } catch (err: any) {
+        } catch (err: unknown) {
-          showAlert('Error', 'Failed to add layer: ' + err.message);
+          showAlert(
+            'Error',
+            'Failed to add layer: ' +
+              (err instanceof Error ? err.message : String(err))
+          );
         }
       };
     }
@@ -409,9 +429,13 @@ document.addEventListener('DOMContentLoaded', () => {
           hideLoader();
           resetState();
           showAlert('Success', 'PDF with layer changes saved!', 'success');
-        } catch (err: any) {
+        } catch (err: unknown) {
           hideLoader();
-          showAlert('Error', 'Failed to save PDF: ' + err.message);
+          showAlert(
+            'Error',
+            'Failed to save PDF: ' +
+              (err instanceof Error ? err.message : String(err))
+          );
         }
       };
     }

src/js/logic/pdf-multi-tool.ts

@@ -9,7 +9,6 @@ import {
   renderPagesProgressively,
   cleanupLazyRendering,
   renderPageToCanvas,
-  createPlaceholder,
 } from '../utils/render-utils';
 import { initializeGlobalShortcuts } from '../utils/shortcuts-init.js';
 import { repairPdfFile } from './repair-pdf.js';
@@ -841,7 +840,7 @@ function deletePage(index: number) {
 
 async function insertPdfAfter(index: number) {
   document.getElementById('insert-pdf-input')?.click();
-  (window as any).__insertAfterIndex = index;
+  (window as unknown as Record<string, unknown>).__insertAfterIndex = index;
 }
 
 async function handleInsertPdf(e: Event) {
@@ -849,7 +848,8 @@ async function handleInsertPdf(e: Event) {
   const file = input.files?.[0];
   if (!file) return;
 
-  const insertAfterIndex = (window as any).__insertAfterIndex;
+  const insertAfterIndex = (window as unknown as Record<string, unknown>)
+    .__insertAfterIndex as number | undefined;
   if (insertAfterIndex === undefined) return;
 
   try {
@@ -974,7 +974,7 @@ function addBlankPage() {
     rotation: 0,
     visualRotation: 0,
     canvas,
-    pdfDoc: null as any,
+    pdfDoc: null!,
     originalPageIndex: -1,
     fileName: '', // Blank page has no file
   };

src/js/logic/pdf-to-csv-page.ts

@@ -1,10 +1,7 @@
 import { showLoader, hideLoader, showAlert } from '../ui.js';
 import { downloadFile, formatBytes } from '../utils/helpers.js';
 import { createIcons, icons } from 'lucide';
-import JSZip from 'jszip';
+import { loadPyMuPDF } from '../utils/pymupdf-loader.js';
-import { isWasmAvailable, getWasmBaseUrl } from '../config/wasm-cdn-config.js';
-import { showWasmRequiredDialog } from '../utils/wasm-provider.js';
-import { loadPyMuPDF, isPyMuPDFAvailable } from '../utils/pymupdf-loader.js';
 import { loadPdfWithPasswordPrompt } from '../utils/password-prompt.js';
 let file: File | null = null;
 

src/js/logic/pdf-to-docx-page.ts

@@ -8,9 +8,7 @@ import {
 } from '../utils/helpers.js';
 import { state } from '../state.js';
 import { createIcons, icons } from 'lucide';
-import { isWasmAvailable, getWasmBaseUrl } from '../config/wasm-cdn-config.js';
+import { loadPyMuPDF } from '../utils/pymupdf-loader.js';
-import { showWasmRequiredDialog } from '../utils/wasm-provider.js';
-import { loadPyMuPDF, isPyMuPDFAvailable } from '../utils/pymupdf-loader.js';
 import { batchDecryptIfNeeded } from '../utils/password-prompt.js';
 import { deduplicateFileName } from '../utils/deduplicate-filename.js';
 
@@ -73,7 +71,7 @@ document.addEventListener('DOMContentLoaded', () => {
           const arrayBuffer = await readFileAsArrayBuffer(file);
           const pdfDoc = await getPDFDocument({ data: arrayBuffer }).promise;
           metaSpan.textContent = `${formatBytes(file.size)} • ${pdfDoc.numPages} pages`;
-        } catch (error) {
+        } catch {
           metaSpan.textContent = `${formatBytes(file.size)} • Could not load page count`;
         }
       }
@@ -160,11 +158,11 @@ document.addEventListener('DOMContentLoaded', () => {
           () => resetState()
         );
       }
-    } catch (e: any) {
+    } catch (e: unknown) {
       hideLoader();
       showAlert(
         'Error',
-        `An error occurred during conversion. Error: ${e.message}`
+        `An error occurred during conversion. Error: ${e instanceof Error ? e.message : String(e)}`
       );
     }
   };

src/js/logic/pdf-to-excel-page.ts

@@ -1,9 +1,7 @@
 import { showLoader, hideLoader, showAlert } from '../ui.js';
 import { downloadFile, formatBytes } from '../utils/helpers.js';
 import { createIcons, icons } from 'lucide';
-import { isWasmAvailable, getWasmBaseUrl } from '../config/wasm-cdn-config.js';
+import { loadPyMuPDF } from '../utils/pymupdf-loader.js';
-import { showWasmRequiredDialog } from '../utils/wasm-provider.js';
-import { loadPyMuPDF, isPyMuPDFAvailable } from '../utils/pymupdf-loader.js';
 import { loadPdfWithPasswordPrompt } from '../utils/password-prompt.js';
 import * as XLSX from 'xlsx';
 let file: File | null = null;

src/js/logic/pdf-to-markdown-page.ts

@@ -8,9 +8,7 @@ import {
 } from '../utils/helpers.js';
 import { state } from '../state.js';
 import { createIcons, icons } from 'lucide';
-import { isWasmAvailable, getWasmBaseUrl } from '../config/wasm-cdn-config.js';
+import { loadPyMuPDF } from '../utils/pymupdf-loader.js';
-import { showWasmRequiredDialog } from '../utils/wasm-provider.js';
-import { loadPyMuPDF, isPyMuPDFAvailable } from '../utils/pymupdf-loader.js';
 import { batchDecryptIfNeeded } from '../utils/password-prompt.js';
 import { deduplicateFileName } from '../utils/deduplicate-filename.js';
 
@@ -76,7 +74,7 @@ document.addEventListener('DOMContentLoaded', () => {
           const arrayBuffer = await readFileAsArrayBuffer(file);
           const pdfDoc = await getPDFDocument({ data: arrayBuffer }).promise;
           metaSpan.textContent = `${formatBytes(file.size)} • ${pdfDoc.numPages} pages`;
-        } catch (error) {
+        } catch {
           metaSpan.textContent = `${formatBytes(file.size)} • Could not load page count`;
         }
       }
@@ -162,11 +160,11 @@ document.addEventListener('DOMContentLoaded', () => {
           () => resetState()
         );
       }
-    } catch (e: any) {
+    } catch (e: unknown) {
       hideLoader();
       showAlert(
         'Error',
-        `An error occurred during conversion. Error: ${e.message}`
+        `An error occurred during conversion. Error: ${e instanceof Error ? e.message : String(e)}`
       );
     }
   };

src/js/logic/pdf-to-markdown.ts

@@ -1,5 +1,9 @@
 import { showLoader, hideLoader, showAlert } from '../ui.js';
-import { downloadFile, readFileAsArrayBuffer, getPDFDocument } from '../utils/helpers.js';
+import {
+  downloadFile,
+  readFileAsArrayBuffer,
+  getPDFDocument,
+} from '../utils/helpers.js';
 import { state } from '../state.js';
 
 export async function pdfToMarkdown() {
@@ -14,7 +18,9 @@ export async function pdfToMarkdown() {
       const page = await pdf.getPage(i);
       const content = await page.getTextContent();
       // This is a simple text extraction. For more advanced formatting, more complex logic is needed.
-      const text = content.items.map((item: any) => item.str).join(' ');
+      const text = content.items
+        .map((item) => ('str' in item ? item.str : ''))
+        .join(' ');
       markdown += text + '\n\n'; // Add double newline for paragraph breaks between pages
     }
 

src/js/logic/pdf-to-pdfa-page.ts

@@ -10,6 +10,7 @@ import { state } from '../state.js';
 import { createIcons, icons } from 'lucide';
 import { convertFileToPdfA, type PdfALevel } from '../utils/ghostscript-loader';
 import { loadPyMuPDF, isPyMuPDFAvailable } from '../utils/pymupdf-loader.js';
+import type { PyMuPDFInstance } from '@/types';
 import { showWasmRequiredDialog } from '../utils/wasm-provider.js';
 import { batchDecryptIfNeeded } from '../utils/password-prompt.js';
 import { deduplicateFileName } from '../utils/deduplicate-filename.js';
@@ -134,7 +135,7 @@ document.addEventListener('DOMContentLoaded', () => {
           const pymupdf = await loadPyMuPDF();
 
           // Rasterize PDF to images and back to PDF (300 DPI for quality)
-          const flattenedBlob = await (pymupdf as any).rasterizePdf(
+          const flattenedBlob = await (pymupdf as PyMuPDFInstance).rasterizePdf(
             originalFile,
             {
               dpi: 300,
@@ -205,11 +206,11 @@ document.addEventListener('DOMContentLoaded', () => {
           () => resetState()
         );
       }
-    } catch (e: any) {
+    } catch (e: unknown) {
       hideLoader();
       showAlert(
         'Error',
-        `An error occurred during conversion. Error: ${e.message}`
+        `An error occurred during conversion. Error: ${e instanceof Error ? e.message : String(e)}`
       );
     }
   };

src/js/logic/pdf-to-svg-page.ts

@@ -2,12 +2,12 @@ import { showLoader, hideLoader, showAlert } from '../ui.js';
 import { downloadFile, formatBytes } from '../utils/helpers.js';
 import { createIcons, icons } from 'lucide';
 import JSZip from 'jszip';
-import { isWasmAvailable, getWasmBaseUrl } from '../config/wasm-cdn-config.js';
-import { showWasmRequiredDialog } from '../utils/wasm-provider.js';
 import { loadPyMuPDF, isPyMuPDFAvailable } from '../utils/pymupdf-loader.js';
+import type { PyMuPDFInstance } from '@/types';
 import { batchDecryptIfNeeded } from '../utils/password-prompt.js';
+import { showWasmRequiredDialog } from '../utils/wasm-provider.js';
 
-let pymupdf: any = null;
+let pymupdf: PyMuPDFInstance | null = null;
 let files: File[] = [];
 
 const updateUI = () => {

src/js/logic/pdf-to-text-page.ts

@@ -1,14 +1,13 @@
 import { createIcons, icons } from 'lucide';
 import { showAlert, showLoader, hideLoader } from '../ui.js';
 import { downloadFile, formatBytes } from '../utils/helpers.js';
-import { isWasmAvailable, getWasmBaseUrl } from '../config/wasm-cdn-config.js';
+import { loadPyMuPDF } from '../utils/pymupdf-loader.js';
-import { showWasmRequiredDialog } from '../utils/wasm-provider.js';
+import type { PyMuPDFInstance } from '@/types';
-import { loadPyMuPDF, isPyMuPDFAvailable } from '../utils/pymupdf-loader.js';
 import { batchDecryptIfNeeded } from '../utils/password-prompt.js';
 import { deduplicateFileName } from '../utils/deduplicate-filename.js';
 
 let files: File[] = [];
-let pymupdf: any = null;
+let pymupdf: PyMuPDFInstance | null = null;
 
 if (document.readyState === 'loading') {
   document.addEventListener('DOMContentLoaded', initializePage);
@@ -159,9 +158,9 @@ function updateUI() {
   }
 }
 
-async function ensurePyMuPDF(): Promise<any> {
+async function ensurePyMuPDF(): Promise<PyMuPDFInstance> {
   if (!pymupdf) {
-    pymupdf = await loadPyMuPDF();
+    pymupdf = (await loadPyMuPDF()) as PyMuPDFInstance;
   }
   return pymupdf;
 }
@@ -230,12 +229,12 @@ async function extractText() {
         }
       );
     }
-  } catch (e: any) {
+  } catch (e: unknown) {
     console.error('[PDFToText]', e);
     hideLoader();
     showAlert(
       'Extraction Error',
-      e.message || 'Failed to extract text from PDF.'
+      e instanceof Error ? e.message : 'Failed to extract text from PDF.'
     );
   }
 }

src/js/logic/pdf-workflow-page.ts

@@ -913,8 +913,15 @@ function showNodeSettings(node: BaseWorkflowNode) {
     content.appendChild(divider);
   }
 
+  interface FileInputNode extends BaseWorkflowNode {
+    hasFile(): boolean;
+    getFilenames(): string[];
+    removeFile(index: number): void;
+    addFiles(files: File[]): Promise<void>;
+  }
+
   const fileInputConfigs: {
-    cls: any;
+    cls: new (...args: unknown[]) => FileInputNode;
     label: string;
     accept: string;
     btnLabel: string;
@@ -1534,7 +1541,7 @@ function showNodeSettings(node: BaseWorkflowNode) {
     }
   }
 
-  for (const [dropdownKey, mapping] of Object.entries(conditionalVisibility)) {
+  for (const [dropdownKey] of Object.entries(conditionalVisibility)) {
     const ctrl = controlEntries.find(([k]) => k === dropdownKey)?.[1] as
       | { value?: unknown }
       | undefined;

src/js/logic/png-to-pdf-page.ts

@@ -160,9 +160,13 @@ function updateUI() {
   }
 }
 
-function sanitizeImageAsJpeg(imageBytes: any) {
+function sanitizeImageAsJpeg(imageBytes: Uint8Array | ArrayBuffer) {
   return new Promise((resolve, reject) => {
-    const blob = new Blob([imageBytes]);
+    const blob = new Blob([
+      imageBytes instanceof Uint8Array
+        ? new Uint8Array(imageBytes)
+        : imageBytes,
+    ]);
     const imageUrl = URL.createObjectURL(blob);
     const img = new Image();
 
@@ -248,9 +252,9 @@ async function convertToPdf() {
     showAlert('Success', 'PDF created successfully!', 'success', () => {
       resetState();
     });
-  } catch (e: any) {
+  } catch (e: unknown) {
     console.error(e);
-    showAlert('Conversion Error', e.message);
+    showAlert('Conversion Error', e instanceof Error ? e.message : String(e));
   } finally {
     hideLoader();
   }

src/js/logic/powerpoint-to-pdf-page.ts

@@ -1,9 +1,5 @@
 import { showLoader, hideLoader, showAlert } from '../ui.js';
-import {
+import { downloadFile, formatBytes } from '../utils/helpers.js';
-  downloadFile,
-  readFileAsArrayBuffer,
-  formatBytes,
-} from '../utils/helpers.js';
 import { state } from '../state.js';
 import { createIcons, icons } from 'lucide';
 import {
@@ -159,11 +155,11 @@ document.addEventListener('DOMContentLoaded', () => {
           () => resetState()
         );
       }
-    } catch (e: any) {
+    } catch (e: unknown) {
       hideLoader();
       showAlert(
         'Error',
-        `An error occurred during conversion. Error: ${e.message}`
+        `An error occurred during conversion. Error: ${e instanceof Error ? e.message : String(e)}`
       );
     }
   };

src/js/logic/prepare-pdf-for-ai-page.ts

@@ -9,6 +9,7 @@ import {
 import { state } from '../state.js';
 import { createIcons, icons } from 'lucide';
 import { loadPyMuPDF } from '../utils/pymupdf-loader.js';
+import type { PyMuPDFInstance } from '@/types';
 import { batchDecryptIfNeeded } from '../utils/password-prompt.js';
 import { deduplicateFileName } from '../utils/deduplicate-filename.js';
 
@@ -117,7 +118,9 @@ document.addEventListener('DOMContentLoaded', () => {
         const file = state.files[0];
         showLoader(`Extracting ${file.name} for AI...`);
 
-        const llamaDocs = await (pymupdf as any).pdfToLlamaIndex(file);
+        const llamaDocs = await (pymupdf as PyMuPDFInstance).pdfToLlamaIndex(
+          file
+        );
         const outName = file.name.replace(/\.pdf$/i, '') + '_llm.json';
         const jsonContent = JSON.stringify(llamaDocs, null, 2);
         downloadFile(
@@ -144,7 +147,9 @@ document.addEventListener('DOMContentLoaded', () => {
               `Extracting ${file.name} for AI (${completed + 1}/${total})...`
             );
 
-            const llamaDocs = await (pymupdf as any).pdfToLlamaIndex(file);
+            const llamaDocs = await (
+              pymupdf as PyMuPDFInstance
+            ).pdfToLlamaIndex(file);
             const outName = file.name.replace(/\.pdf$/i, '') + '_llm.json';
             const jsonContent = JSON.stringify(llamaDocs, null, 2);
             const zipEntryName = deduplicateFileName(outName, usedNames);
@@ -180,11 +185,11 @@ document.addEventListener('DOMContentLoaded', () => {
           );
         }
       }
-    } catch (e: any) {
+    } catch (e: unknown) {
       hideLoader();
       showAlert(
         'Error',
-        `An error occurred during extraction. Error: ${e.message}`
+        `An error occurred during extraction. Error: ${e instanceof Error ? e.message : String(e)}`
       );
     }
   };

src/js/logic/psd-to-pdf-page.ts

@@ -2,18 +2,17 @@ import { showLoader, hideLoader, showAlert } from '../ui.js';
 import { downloadFile, formatBytes } from '../utils/helpers.js';
 import { state } from '../state.js';
 import { createIcons, icons } from 'lucide';
-import { isWasmAvailable, getWasmBaseUrl } from '../config/wasm-cdn-config.js';
+import { loadPyMuPDF } from '../utils/pymupdf-loader.js';
-import { showWasmRequiredDialog } from '../utils/wasm-provider.js';
+import type { PyMuPDFInstance } from '@/types';
-import { loadPyMuPDF, isPyMuPDFAvailable } from '../utils/pymupdf-loader.js';
 
 const ACCEPTED_EXTENSIONS = ['.psd'];
 const FILETYPE_NAME = 'PSD';
 
-let pymupdf: any = null;
+let pymupdf: PyMuPDFInstance | null = null;
 
-async function ensurePyMuPDF(): Promise<any> {
+async function ensurePyMuPDF(): Promise<PyMuPDFInstance> {
   if (!pymupdf) {
-    pymupdf = await loadPyMuPDF();
+    pymupdf = (await loadPyMuPDF()) as PyMuPDFInstance;
   }
   return pymupdf;
 }

src/js/logic/rasterize-pdf-page.ts

@@ -8,11 +8,11 @@ import {
 } from '../utils/helpers.js';
 import { state } from '../state.js';
 import { createIcons, icons } from 'lucide';
-import { isWasmAvailable, getWasmBaseUrl } from '../config/wasm-cdn-config.js';
-import { showWasmRequiredDialog } from '../utils/wasm-provider.js';
 import { loadPyMuPDF, isPyMuPDFAvailable } from '../utils/pymupdf-loader.js';
+import type { PyMuPDFInstance } from '@/types';
 import { batchDecryptIfNeeded } from '../utils/password-prompt.js';
 import { deduplicateFileName } from '../utils/deduplicate-filename.js';
+import { showWasmRequiredDialog } from '../utils/wasm-provider.js';
 
 document.addEventListener('DOMContentLoaded', () => {
   const fileInput = document.getElementById('file-input') as HTMLInputElement;
@@ -136,12 +136,15 @@ document.addEventListener('DOMContentLoaded', () => {
         const file = state.files[0];
         showLoader(`Rasterizing ${file.name}...`);
 
-        const rasterizedBlob = await (pymupdf as any).rasterizePdf(file, {
+        const rasterizedBlob = await (pymupdf as PyMuPDFInstance).rasterizePdf(
+          file,
+          {
             dpi,
             format,
             grayscale,
             quality: 95,
-        });
+          }
+        );
 
         const outName = file.name.replace(/\.pdf$/i, '') + '_rasterized.pdf';
         downloadFile(rasterizedBlob, outName);
@@ -165,7 +168,9 @@ document.addEventListener('DOMContentLoaded', () => {
               `Rasterizing ${file.name} (${completed + 1}/${total})...`
             );
 
-            const rasterizedBlob = await (pymupdf as any).rasterizePdf(file, {
+            const rasterizedBlob = await (
+              pymupdf as PyMuPDFInstance
+            ).rasterizePdf(file, {
               dpi,
               format,
               grayscale,
@@ -210,11 +215,11 @@ document.addEventListener('DOMContentLoaded', () => {
           );
         }
       }
-    } catch (e: any) {
+    } catch (e: unknown) {
       hideLoader();
       showAlert(
         'Error',
-        `An error occurred during rasterization. Error: ${e.message}`
+        `An error occurred during rasterization. Error: ${e instanceof Error ? e.message : String(e)}`
       );
     }
   };

src/js/logic/redact.ts

@@ -2,16 +2,18 @@ import { showLoader, hideLoader, showAlert } from '../ui.js';
 import { downloadFile } from '../utils/helpers.js';
 import { state } from '../state.js';
 
+import type { RedactionRect } from '@/types';
+
 // @ts-expect-error TS(2339) FIXME: Property 'PDFLib' does not exist on type 'Window &... Remove this comment to see the full error message
 const { rgb } = window.PDFLib;
 
-export async function redact(redactions: any, canvasScale: any) {
+export async function redact(redactions: RedactionRect[], canvasScale: number) {
   showLoader('Applying redactions...');
   try {
     const pdfPages = state.pdfDoc.getPages();
     const conversionScale = 1 / canvasScale;
 
-    redactions.forEach((r: any) => {
+    redactions.forEach((r: RedactionRect) => {
       const page = pdfPages[r.pageIndex];
       const { height: pageHeight } = page.getSize();
 
@@ -32,7 +34,7 @@ export async function redact(redactions: any, canvasScale: any) {
 
     const redactedBytes = await state.pdfDoc.save();
     downloadFile(
-      new Blob([redactedBytes], { type: 'application/pdf' }),
+      new Blob([new Uint8Array(redactedBytes)], { type: 'application/pdf' }),
       'redacted.pdf'
     );
   } catch (e) {

src/js/logic/remove-blank-pages-page.ts

@@ -36,7 +36,7 @@ function hideLoader() {
 function showAlert(
   title: string,
   msg: string,
-  type = 'error',
+  _type = 'error',
   cb?: () => void
 ) {
   const modal = document.getElementById('alert-modal');
@@ -138,7 +138,7 @@ async function handleFileUpload(file: File) {
 }
 
 async function isPageBlank(
-  page: any,
+  page: pdfjsLib.PDFPageProxy,
   maxNonWhitePercent = 0.5
 ): Promise<boolean> {
   const viewport = page.getViewport({ scale: 0.5 });
@@ -149,7 +149,7 @@ async function isPageBlank(
   canvas.width = viewport.width;
   canvas.height = viewport.height;
 
-  await page.render({ canvasContext: ctx, viewport }).promise;
+  await page.render({ canvas: null, canvasContext: ctx, viewport }).promise;
 
   const imageData = ctx.getImageData(0, 0, canvas.width, canvas.height);
   const data = imageData.data;
@@ -165,7 +165,7 @@ async function isPageBlank(
   return nonWhitePercent <= maxNonWhitePercent;
 }
 
-async function generateThumbnail(page: any): Promise<string> {
+async function generateThumbnail(page: pdfjsLib.PDFPageProxy): Promise<string> {
   const viewport = page.getViewport({ scale: 1 });
   const canvas = document.createElement('canvas');
   const ctx = canvas.getContext('2d');
@@ -174,7 +174,7 @@ async function generateThumbnail(page: any): Promise<string> {
   canvas.width = viewport.width;
   canvas.height = viewport.height;
 
-  await page.render({ canvasContext: ctx, viewport }).promise;
+  await page.render({ canvas: null, canvasContext: ctx, viewport }).promise;
   return canvas.toDataURL('image/jpeg', 0.7);
 }
 

src/js/logic/remove-restrictions-page.ts

@@ -6,7 +6,7 @@ import {
   readFileAsArrayBuffer,
 } from '../utils/helpers.js';
 import { icons, createIcons } from 'lucide';
-import { RemoveRestrictionsState } from '@/types';
+import { RemoveRestrictionsState, QpdfInstanceExtended } from '@/types';
 
 const pageState: RemoveRestrictionsState = {
   file: null,
@@ -98,7 +98,7 @@ async function removeRestrictions() {
 
   const inputPath = '/input.pdf';
   const outputPath = '/output.pdf';
-  let qpdf: any;
+  let qpdf: QpdfInstanceExtended;
 
   const loaderModal = document.getElementById('loader-modal');
   const loaderText = document.getElementById('loader-text');
@@ -127,12 +127,10 @@ async function removeRestrictions() {
 
     try {
       qpdf.callMain(args);
-    } catch (qpdfError: any) {
+    } catch (qpdfError: unknown) {
       console.error('qpdf execution error:', qpdfError);
-      if (
+      const qpdfMsg = qpdfError instanceof Error ? qpdfError.message : '';
-        qpdfError.message?.includes('password') ||
+      if (qpdfMsg.includes('password') || qpdfMsg.includes('encrypt')) {
-        qpdfError.message?.includes('encrypt')
-      ) {
         throw new Error(
           'Failed to remove restrictions. The PDF may require the correct owner password.',
           { cause: qpdfError }
@@ -140,8 +138,7 @@ async function removeRestrictions() {
       }
 
       throw new Error(
-        'Failed to remove restrictions: ' +
+        'Failed to remove restrictions: ' + (qpdfMsg || 'Unknown error'),
-          (qpdfError.message || 'Unknown error'),
         { cause: qpdfError }
       );
     }
@@ -153,7 +150,9 @@ async function removeRestrictions() {
       throw new Error('Operation resulted in an empty file.');
     }
 
-    const blob = new Blob([outputFile], { type: 'application/pdf' });
+    const blob = new Blob([new Uint8Array(outputFile)], {
+      type: 'application/pdf',
+    });
     downloadFile(blob, `unrestricted-${pageState.file.name}`);
 
     if (loaderModal) loaderModal.classList.add('hidden');
@@ -166,12 +165,12 @@ async function removeRestrictions() {
         resetState();
       }
     );
-  } catch (error: any) {
+  } catch (error: unknown) {
     console.error('Error during restriction removal:', error);
     if (loaderModal) loaderModal.classList.add('hidden');
     showAlert(
       'Operation Failed',
-      `An error occurred: ${error.message || 'The PDF might be corrupted or password-protected.'}`
+      `An error occurred: ${error instanceof Error ? error.message : 'The PDF might be corrupted or password-protected.'}`
     );
   } finally {
     try {

src/js/logic/repair-pdf.ts

@@ -8,11 +8,12 @@ import { state } from '../state.js';
 import JSZip from 'jszip';
 import { deduplicateFileName } from '../utils/deduplicate-filename.js';
 import { batchDecryptIfNeeded } from '../utils/password-prompt.js';
+import type { QpdfInstanceExtended } from '@/types';
 
 export async function repairPdfFile(file: File): Promise<Uint8Array | null> {
   const inputPath = '/input.pdf';
   const outputPath = '/repaired_form.pdf';
-  let qpdf: any;
+  let qpdf: QpdfInstanceExtended;
 
   try {
     qpdf = await initializeQpdf();

src/js/logic/rtf-to-pdf-page.ts

@@ -1,9 +1,5 @@
 import { showLoader, hideLoader, showAlert } from '../ui.js';
-import {
+import { downloadFile, formatBytes } from '../utils/helpers.js';
-  downloadFile,
-  readFileAsArrayBuffer,
-  formatBytes,
-} from '../utils/helpers.js';
 import { state } from '../state.js';
 import { createIcons, icons } from 'lucide';
 import {
@@ -158,11 +154,11 @@ document.addEventListener('DOMContentLoaded', () => {
           () => resetState()
         );
       }
-    } catch (e: any) {
+    } catch (e: unknown) {
       hideLoader();
       showAlert(
         'Error',
-        `An error occurred during conversion. Error: ${e.message}`
+        `An error occurred during conversion. Error: ${e instanceof Error ? e.message : String(e)}`
       );
     }
   };

src/js/logic/shortcuts.ts

@@ -1,11 +1,12 @@
 import { categories } from '../config/tools.js';
+import type { ToolEntry } from '@/types';
 
 export class ShortcutsManager {
   private static STORAGE_KEY = 'bentopdf_shortcuts';
   private static shortcuts: Map<string, string> = new Map();
   private static defaultShortcuts: Map<string, string> = new Map();
 
-    private static getToolId(tool: any): string {
+  private static getToolId(tool: ToolEntry): string {
     if (tool.id) return tool.id;
     if (tool.href) {
       // Extract filename without extension from href
@@ -34,9 +35,9 @@ export class ShortcutsManager {
         const parsed = JSON.parse(stored);
         this.shortcuts = new Map(Object.entries(parsed));
 
-                const allTools = categories.flatMap(c => c.tools);
+        const allTools = categories.flatMap((c) => c.tools);
-                const validToolIds = allTools.map(t => this.getToolId(t));
+        const validToolIds = allTools.map((t) => this.getToolId(t));
-                for (const [toolId, _] of this.shortcuts.entries()) {
+        for (const [toolId] of this.shortcuts.entries()) {
           if (!validToolIds.includes(toolId)) {
             this.shortcuts.delete(toolId);
           }
@@ -97,17 +98,19 @@ export class ShortcutsManager {
     // Create a map with all tools, defaulting to empty string if not set
     const exportObj: Record<string, string> = {};
 
-        const allTools = categories.flatMap(c => c.tools);
+    const allTools = categories.flatMap((c) => c.tools);
 
-        allTools.forEach(tool => {
+    allTools.forEach((tool) => {
       const toolId = this.getToolId(tool);
       exportObj[toolId] = this.shortcuts.get(toolId) || '';
     });
 
-        const dataStr = "data:text/json;charset=utf-8," + encodeURIComponent(JSON.stringify(exportObj, null, 2));
+    const dataStr =
+      'data:text/json;charset=utf-8,' +
+      encodeURIComponent(JSON.stringify(exportObj, null, 2));
     const downloadAnchorNode = document.createElement('a');
-        downloadAnchorNode.setAttribute("href", dataStr);
+    downloadAnchorNode.setAttribute('href', dataStr);
-        downloadAnchorNode.setAttribute("download", "bentopdf_shortcuts.json");
+    downloadAnchorNode.setAttribute('download', 'bentopdf_shortcuts.json');
     document.body.appendChild(downloadAnchorNode);
     downloadAnchorNode.click();
     downloadAnchorNode.remove();
@@ -132,10 +135,16 @@ export class ShortcutsManager {
   }
 
   private static setupGlobalListener() {
-        window.addEventListener('keydown', (e) => {
+    window.addEventListener(
+      'keydown',
+      (e) => {
         // Ignore if typing in an input or textarea
         const target = e.target as HTMLElement;
-            if (target.tagName === 'INPUT' || target.tagName === 'TEXTAREA' || target.isContentEditable) {
+        if (
+          target.tagName === 'INPUT' ||
+          target.tagName === 'TEXTAREA' ||
+          target.isContentEditable
+        ) {
           return;
         }
 
@@ -176,17 +185,18 @@ export class ShortcutsManager {
             e.stopPropagation();
 
             // Find the tool in categories
-                    const allTools = categories.flatMap(c => c.tools);
+            const allTools = categories.flatMap((c) => c.tools);
-                    const tool = allTools.find(t => this.getToolId(t) === toolId);
+            const tool = allTools.find((t) => this.getToolId(t) === toolId);
 
-                    if (tool && (tool as any).href) {
+            if (tool && tool.href) {
-                        // All tools now use href - navigate to the page
+              const href = tool.href;
-                        const href = (tool as any).href;
               window.location.href = href.startsWith('/') ? href : `/${href}`;
             }
             return;
           }
         }
-        }, { capture: true });
+      },
+      { capture: true }
+    );
   }
 }

src/js/logic/split-pdf-page.ts

@@ -16,7 +16,6 @@ import JSZip from 'jszip';
 import { PDFDocument as PDFLibDocument } from 'pdf-lib';
 import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
-// @ts-ignore
 pdfjsLib.GlobalWorkerOptions.workerSrc = new URL(
   'pdfjs-dist/build/pdf.worker.min.mjs',
   import.meta.url
@@ -178,7 +177,7 @@ document.addEventListener('DOMContentLoaded', () => {
         imgContainer.append(img, pageNumDiv);
         wrapper.appendChild(imgContainer);
 
-        const handleSelection = (e: any) => {
+        const handleSelection = (e: Event) => {
           e.preventDefault();
           e.stopPropagation();
 
@@ -286,7 +285,7 @@ document.addEventListener('DOMContentLoaded', () => {
       let indicesToExtract: number[] = [];
 
       switch (splitMode) {
-        case 'range':
+        case 'range': {
           const pageRangeInput = (
             document.getElementById('page-range') as HTMLInputElement
           ).value;
@@ -331,7 +330,7 @@ document.addEventListener('DOMContentLoaded', () => {
               const group = rangeGroups[i];
               const newPdf = await PDFLibDocument.create();
               const copiedPages = await newPdf.copyPages(state.pdfDoc, group);
-              copiedPages.forEach((page: any) => newPdf.addPage(page));
+              copiedPages.forEach((page) => newPdf.addPage(page));
               const pdfBytes = await newPdf.save();
 
               const minPage = Math.min(...group) + 1;
@@ -357,8 +356,9 @@ document.addEventListener('DOMContentLoaded', () => {
             return;
           }
           break;
+        }
 
-        case 'even-odd':
+        case 'even-odd': {
           const choiceElement = document.querySelector(
             'input[name="even-odd-choice"]:checked'
           ) as HTMLInputElement;
@@ -371,6 +371,7 @@ document.addEventListener('DOMContentLoaded', () => {
             if (choice === 'odd' && (i + 1) % 2 !== 0) indicesToExtract.push(i);
           }
           break;
+        }
         case 'all':
           indicesToExtract = Array.from({ length: totalPages }, (_, i) => i);
           break;
@@ -379,8 +380,7 @@ document.addEventListener('DOMContentLoaded', () => {
             document.querySelectorAll('.page-thumbnail-wrapper.selected')
           ).map((el) => parseInt((el as HTMLElement).dataset.pageIndex || '0'));
           break;
-        case 'bookmarks':
+        case 'bookmarks': {
-          // Check if CPDF is configured
           if (!isCpdfAvailable()) {
             showWasmRequiredDialog('cpdf');
             hideLoader();
@@ -404,7 +404,7 @@ document.addEventListener('DOMContentLoaded', () => {
 
             if (bookmarkLevel === 'all' || level === parseInt(bookmarkLevel)) {
               if (page > 1 && !splitPages.includes(page - 1)) {
-                splitPages.push(page - 1); // Convert to 0-based index
+                splitPages.push(page - 1);
               }
             }
           }
@@ -434,7 +434,7 @@ document.addEventListener('DOMContentLoaded', () => {
               state.pdfDoc,
               pageIndices
             );
-            copiedPages.forEach((page: any) => newPdf.addPage(page));
+            copiedPages.forEach((page) => newPdf.addPage(page));
             const pdfBytes2 = await newPdf.save();
             zip.file(`split-${i + 1}.pdf`, pdfBytes2);
           }
@@ -446,8 +446,9 @@ document.addEventListener('DOMContentLoaded', () => {
             resetState();
           });
           return;
+        }
 
-        case 'n-times':
+        case 'n-times': {
           const nValue = parseInt(
             (document.getElementById('split-n-value') as HTMLInputElement)
               ?.value || '5'
@@ -470,7 +471,7 @@ document.addEventListener('DOMContentLoaded', () => {
               state.pdfDoc,
               pageIndices
             );
-            copiedPages.forEach((page: any) => newPdf.addPage(page));
+            copiedPages.forEach((page) => newPdf.addPage(page));
             const pdfBytes3 = await newPdf.save();
             zip2.file(`split-${i + 1}.pdf`, pdfBytes3);
           }
@@ -483,6 +484,7 @@ document.addEventListener('DOMContentLoaded', () => {
           });
           return;
         }
+      }
 
       const uniqueIndices = [...new Set(indicesToExtract)];
       if (
@@ -506,8 +508,7 @@ document.addEventListener('DOMContentLoaded', () => {
           ]);
           newPdf.addPage(copiedPage);
           const pdfBytes = await newPdf.save();
-          // @ts-ignore
+          zip.file(`page-${index + 1}.pdf`, new Uint8Array(pdfBytes));
-          zip.file(`page-${index + 1}.pdf`, pdfBytes);
         }
         const zipBlob = await zip.generateAsync({ type: 'blob' });
         downloadFile(zipBlob, 'split-pages.zip');
@@ -517,7 +518,7 @@ document.addEventListener('DOMContentLoaded', () => {
           state.pdfDoc,
           uniqueIndices as number[]
         );
-        copiedPages.forEach((page: any) => newPdf.addPage(page));
+        copiedPages.forEach((page) => newPdf.addPage(page));
         const pdfBytes = await newPdf.save();
         downloadFile(
           new Blob([new Uint8Array(pdfBytes)], { type: 'application/pdf' }),
@@ -532,11 +533,13 @@ document.addEventListener('DOMContentLoaded', () => {
       showAlert('Success', 'PDF split successfully!', 'success', () => {
         resetState();
       });
-    } catch (e: any) {
+    } catch (e: unknown) {
       console.error(e);
       showAlert(
         'Error',
-        e.message || 'Failed to split PDF. Please check your selection.'
+        e instanceof Error
+          ? e.message
+          : 'Failed to split PDF. Please check your selection.'
       );
     } finally {
       hideLoader();

src/js/logic/svg-to-pdf-page.ts

@@ -1,10 +1,6 @@
 import { createIcons, icons } from 'lucide';
 import { showAlert, showLoader, hideLoader } from '../ui.js';
-import {
+import { downloadFile, formatBytes } from '../utils/helpers.js';
-  downloadFile,
-  readFileAsArrayBuffer,
-  formatBytes,
-} from '../utils/helpers.js';
 import { PDFDocument as PDFLibDocument } from 'pdf-lib';
 import {
   getSelectedQuality,
@@ -261,9 +257,9 @@ async function convertToPdf() {
     showAlert('Success', 'PDF created successfully!', 'success', () => {
       resetState();
     });
-  } catch (e: any) {
+  } catch (e: unknown) {
     console.error(e);
-    showAlert('Conversion Error', e.message);
+    showAlert('Conversion Error', e instanceof Error ? e.message : String(e));
   } finally {
     hideLoader();
   }

src/js/logic/table-of-contents.ts

@@ -36,15 +36,6 @@ const backToToolsBtn = document.getElementById(
   'back-to-tools'
 ) as HTMLButtonElement;
 
-interface GenerateTOCMessage {
-  command: 'generate-toc';
-  pdfData: ArrayBuffer;
-  title: string;
-  fontSize: number;
-  fontFamily: number;
-  addBookmark: boolean;
-}
-
 interface TOCSuccessResponse {
   status: 'success';
   pdfBytes: ArrayBuffer;

src/js/logic/txt-to-pdf-page.ts

@@ -1,9 +1,7 @@
 import { showLoader, hideLoader, showAlert } from '../ui.js';
 import { downloadFile, formatBytes } from '../utils/helpers.js';
 import { createIcons, icons } from 'lucide';
-import { isWasmAvailable, getWasmBaseUrl } from '../config/wasm-cdn-config.js';
+import { loadPyMuPDF } from '../utils/pymupdf-loader.js';
-import { showWasmRequiredDialog } from '../utils/wasm-provider.js';
-import { loadPyMuPDF, isPyMuPDFAvailable } from '../utils/pymupdf-loader.js';
 
 let files: File[] = [];
 let currentMode: 'upload' | 'text' = 'upload';
@@ -140,9 +138,12 @@ async function convert() {
         resetState();
       }
     );
-  } catch (e: any) {
+  } catch (e: unknown) {
     console.error('[TxtToPDF] Error:', e);
-    showAlert('Error', `Failed to convert text to PDF. ${e.message || ''}`);
+    showAlert(
+      'Error',
+      `Failed to convert text to PDF. ${e instanceof Error ? e.message : ''}`
+    );
   } finally {
     hideLoader();
   }

src/js/logic/validate-signature-pdf.ts

@@ -100,7 +100,13 @@ export function validateSignature(
       Array.from(signature.contents)
     );
     const asn1 = forge.asn1.fromDer(binaryString);
-    const p7 = forge.pkcs7.messageFromAsn1(asn1) as any;
+    const p7 = forge.pkcs7.messageFromAsn1(
+      asn1
+    ) as forge.pkcs7.PkcsSignedData & {
+      rawCapture?: {
+        authenticatedAttributes?: Array<{ type: string; value: Date }>;
+      };
+    };
 
     if (!p7.certificates || p7.certificates.length === 0) {
       result.errorMessage = 'No certificates found in signature';
@@ -166,10 +172,8 @@ export function validateSignature(
     } else {
       // Try to extract from authenticated attributes
       try {
-        const signedData = p7 as any;
+        if (p7.rawCapture?.authenticatedAttributes) {
-        if (signedData.rawCapture?.authenticatedAttributes) {
+          for (const attr of p7.rawCapture.authenticatedAttributes) {
-          // Look for signing time attribute
-          for (const attr of signedData.rawCapture.authenticatedAttributes) {
             if (attr.type === forge.pki.oids.signingTime) {
               result.signatureDate = attr.value;
               break;
@@ -185,7 +189,7 @@ export function validateSignature(
     }
 
     if (signature.byteRange && signature.byteRange.length === 4) {
-      const [start1, len1, start2, len2] = signature.byteRange;
+      const [, len1, start2, len2] = signature.byteRange;
       const totalCovered = len1 + len2;
       const expectedEnd = start2 + len2;
 

src/js/logic/webp-to-pdf-page.ts

@@ -160,9 +160,13 @@ function updateUI() {
   }
 }
 
-function sanitizeImageAsJpeg(imageBytes: any) {
+function sanitizeImageAsJpeg(imageBytes: Uint8Array | ArrayBuffer) {
   return new Promise((resolve, reject) => {
-    const blob = new Blob([imageBytes]);
+    const blob = new Blob([
+      imageBytes instanceof Uint8Array
+        ? new Uint8Array(imageBytes)
+        : imageBytes,
+    ]);
     const imageUrl = URL.createObjectURL(blob);
     const img = new Image();
 
@@ -248,9 +252,9 @@ async function convertToPdf() {
     showAlert('Success', 'PDF created successfully!', 'success', () => {
       resetState();
     });
-  } catch (e: any) {
+  } catch (e: unknown) {
     console.error(e);
-    showAlert('Conversion Error', e.message);
+    showAlert('Conversion Error', e instanceof Error ? e.message : String(e));
   } finally {
     hideLoader();
   }

src/js/logic/word-to-pdf-page.ts

@@ -1,9 +1,5 @@
 import { showLoader, hideLoader, showAlert } from '../ui.js';
-import {
+import { downloadFile, formatBytes } from '../utils/helpers.js';
-  downloadFile,
-  readFileAsArrayBuffer,
-  formatBytes,
-} from '../utils/helpers.js';
 import { state } from '../state.js';
 import { createIcons, icons } from 'lucide';
 import {
@@ -187,13 +183,16 @@ document.addEventListener('DOMContentLoaded', () => {
           () => resetState()
         );
       }
-    } catch (e: any) {
+    } catch (e: unknown) {
       console.error('[Word2PDF] ERROR:', e);
-      console.error('[Word2PDF] Error stack:', e.stack);
+      console.error(
+        '[Word2PDF] Error stack:',
+        e instanceof Error ? e.stack : ''
+      );
       hideLoader();
       showAlert(
         'Error',
-        `An error occurred during conversion. Error: ${e.message}`
+        `An error occurred during conversion. Error: ${e instanceof Error ? e.message : String(e)}`
       );
     }
   };

src/js/logic/word-to-pdf.ts

@@ -15,13 +15,18 @@ export async function wordToPdf() {
   try {
     const mammothOptions = {
       // @ts-expect-error TS(2304) FIXME: Cannot find name 'mammoth'.
-      convertImage: mammoth.images.inline((element: any) => {
+      convertImage: mammoth.images.inline(
-        return element.read('base64').then((imageBuffer: any) => {
+        (element: {
+          read: (encoding: string) => Promise<string>;
+          contentType: string;
+        }) => {
+          return element.read('base64').then((imageBuffer: string) => {
             return {
               src: `data:${element.contentType};base64,${imageBuffer}`,
             };
           });
-      }),
+        }
+      ),
     };
     const arrayBuffer = await readFileAsArrayBuffer(file);
     // @ts-expect-error TS(2304) FIXME: Cannot find name 'mammoth'.
@@ -77,7 +82,18 @@ export async function wordToPdf() {
       });
 
       await doc.html(previewContent, {
-        callback: function (doc: any) {
+        callback: function (doc: {
+          internal: { pageSize: { getHeight: () => number } };
+          link: (
+            x: number,
+            y: number,
+            w: number,
+            h: number,
+            opts: { url: string }
+          ) => void;
+          save: (name: string) => void;
+          setPage: (page: number) => void;
+        }) {
           const links = previewContent.querySelectorAll('a');
           const pageHeight = doc.internal.pageSize.getHeight();
           const containerRect = previewContent.getBoundingClientRect(); // Get container's position

src/js/logic/wpd-to-pdf-page.ts

@@ -150,12 +150,12 @@ document.addEventListener('DOMContentLoaded', () => {
           () => resetState()
         );
       }
-    } catch (e: any) {
+    } catch (e: unknown) {
       hideLoader();
       console.error(`[${FILETYPE_NAME}ToPDF] Error:`, e);
       showAlert(
         'Error',
-        `An error occurred during conversion. Error: ${e.message}`
+        `An error occurred during conversion. Error: ${e instanceof Error ? e.message : String(e)}`
       );
     }
   };

src/js/logic/wps-to-pdf-page.ts

@@ -150,12 +150,12 @@ document.addEventListener('DOMContentLoaded', () => {
           () => resetState()
         );
       }
-    } catch (e: any) {
+    } catch (e: unknown) {
       hideLoader();
       console.error(`[${FILETYPE_NAME}ToPDF] Error:`, e);
       showAlert(
         'Error',
-        `An error occurred during conversion. Error: ${e.message}`
+        `An error occurred during conversion. Error: ${e instanceof Error ? e.message : String(e)}`
       );
     }
   };

src/js/logic/xps-to-pdf-page.ts

@@ -2,9 +2,7 @@ import { showLoader, hideLoader, showAlert } from '../ui.js';
 import { downloadFile, formatBytes } from '../utils/helpers.js';
 import { state } from '../state.js';
 import { createIcons, icons } from 'lucide';
-import { isWasmAvailable, getWasmBaseUrl } from '../config/wasm-cdn-config.js';
+import { loadPyMuPDF } from '../utils/pymupdf-loader.js';
-import { showWasmRequiredDialog } from '../utils/wasm-provider.js';
-import { loadPyMuPDF, isPyMuPDFAvailable } from '../utils/pymupdf-loader.js';
 import { deduplicateFileName } from '../utils/deduplicate-filename.js';
 
 const FILETYPE = 'xps';
@@ -147,12 +145,12 @@ document.addEventListener('DOMContentLoaded', () => {
           () => resetState()
         );
       }
-    } catch (e: any) {
+    } catch (e: unknown) {
       console.error(`[${TOOL_NAME}2PDF] ERROR:`, e);
       hideLoader();
       showAlert(
         'Error',
-        `An error occurred during conversion. Error: ${e.message}`
+        `An error occurred during conversion. Error: ${e instanceof Error ? e.message : String(e)}`
       );
     }
   };

src/js/main.ts

@@ -6,13 +6,11 @@ import '@phosphor-icons/web/regular';
 import * as pdfjsLib from 'pdfjs-dist';
 import '../css/styles.css';
 import { formatShortcutDisplay, formatStars } from './utils/helpers.js';
-import { APP_VERSION } from '../version.js';
 import {
   initI18n,
   applyTranslations,
   rewriteLinks,
   injectLanguageSwitcher,
-  createLanguageSwitcher,
   t,
 } from './i18n/index.js';
 import {
@@ -501,7 +499,7 @@ const init = async () => {
       }
     });
 
-    dom.toolGrid.addEventListener('click', (e) => {
+    dom.toolGrid.addEventListener('click', () => {
       // All tools now use href and navigate directly - no modal handling needed
     });
   }
@@ -889,7 +887,7 @@ const init = async () => {
     });
   }
 
-  function getToolId(tool: any): string {
+  function getToolId(tool: { id?: string; href?: string }): string {
     if (tool.id) return tool.id;
     if (tool.href) {
       const match = tool.href.match(/\/([^/]+)\.html$/);

src/js/state.ts

@@ -1,4 +1,12 @@
-export const state = {
+import type { PDFDocument } from 'pdf-lib';
+
+export const state: {
+  activeTool: string | null;
+  files: File[];
+  pdfDoc: PDFDocument | null;
+  pdfPages: unknown[];
+  currentPdfUrl: string | null;
+} = {
   activeTool: null,
   files: [],
   pdfDoc: null,

src/js/types/alternate-merge-page-type.ts

@@ -1,5 +1,7 @@
+import type { PDFDocumentProxy } from 'pdfjs-dist';
+
 export interface AlternateMergeState {
   files: File[];
   pdfBytes: Map<string, ArrayBuffer>;
-    pdfDocs: Map<string, any>;
+  pdfDocs: Map<string, PDFDocumentProxy>;
 }

src/js/types/canvas-editor-type.ts

@@ -0,0 +1,7 @@
+export interface CropBox {
+  x: number;
+  y: number;
+  width: number;
+  height: number;
+  scale: number | 'fit';
+}

src/js/types/crop-pdf-type.ts

@@ -1,8 +1,18 @@
+import type { PDFDocumentProxy } from 'pdfjs-dist';
+import Cropper from 'cropperjs';
+
+export interface CropPercentages {
+  x: number;
+  y: number;
+  width: number;
+  height: number;
+}
+
 export interface CropperState {
-    pdfDoc: any;
+  pdfDoc: PDFDocumentProxy | null;
   currentPageNum: number;
-    cropper: any;
+  cropper: Cropper | null;
   originalPdfBytes: ArrayBuffer | null;
-    pageCrops: Record<number, any>;
+  pageCrops: Record<number, CropPercentages>;
   file: File | null;
 }

src/js/types/delete-pages-type.ts

@@ -1,7 +1,10 @@
+import { PDFDocument as PDFLibDocument } from 'pdf-lib';
+import type { PDFDocumentProxy } from 'pdfjs-dist';
+
 export interface DeletePagesState {
   file: File | null;
-    pdfDoc: any;
+  pdfDoc: PDFLibDocument | null;
-    pdfJsDoc: any;
+  pdfJsDoc: PDFDocumentProxy | null;
   totalPages: number;
   pagesToDelete: Set<number>;
 }

src/js/types/edit-pdf-type.ts

@@ -0,0 +1,15 @@
+export interface DocManagerPlugin {
+  onDocumentClosed: (
+    callback: (data: { id?: string } | string) => void
+  ) => void;
+  onDocumentOpened: (
+    callback: (data: { id?: string; name?: string }) => void
+  ) => void;
+  openDocumentBuffer: (opts: {
+    buffer: ArrayBuffer;
+    name?: string;
+    autoActivate?: boolean;
+  }) => void;
+  closeDocument: (id: string) => void;
+  saveAsCopy: (id: string) => Promise<Uint8Array>;
+}

src/js/types/index.ts

@@ -56,3 +56,12 @@ export * from './pdf-to-tiff-type.ts';
 export * from './pdf-to-cbz-type.ts';
 export * from './password-prompt-type.ts';
 export * from './config-types.ts';
+export * from './utils-types.ts';
+export * from './merge-worker-type.ts';
+export * from './canvas-editor-type.ts';
+export * from './edit-pdf-type.ts';
+export * from './redact-type.ts';
+export * from './shortcuts-type.ts';
+export * from './ui-type.ts';
+export * from './markdown-editor-type.ts';
+export * from './sanitize-type.ts';

src/js/types/markdown-editor-type.ts

@@ -0,0 +1,28 @@
+export interface MarkdownItOptions {
+  html: boolean;
+  breaks: boolean;
+  linkify: boolean;
+  typographer: boolean;
+  highlight?: (str: string, lang: string) => string;
+}
+
+export interface MarkdownItToken {
+  attrSet(name: string, value: string): void;
+  [key: string]: unknown;
+}
+
+export interface MarkdownItRendererSelf {
+  renderToken(
+    tokens: MarkdownItToken[],
+    idx: number,
+    options: MarkdownItOptions
+  ): string;
+}
+
+export type MarkdownItRenderRule = (
+  tokens: MarkdownItToken[],
+  idx: number,
+  options: MarkdownItOptions,
+  env: unknown,
+  self: MarkdownItRendererSelf
+) => string;

src/js/types/merge-pdf-type.ts

@@ -1,5 +1,7 @@
+import type { PDFDocumentProxy } from 'pdfjs-dist';
+
 export interface MergeState {
   files: File[];
   pdfBytes: Map<string, ArrayBuffer>;
-    pdfDocs: Map<string, any>;
+  pdfDocs: Map<string, PDFDocumentProxy>;
 }

src/js/types/merge-worker-type.ts

@@ -0,0 +1,32 @@
+export interface MergeJob {
+  fileName: string;
+  rangeType: 'all' | 'specific' | 'single' | 'range';
+  rangeString?: string;
+  pageIndex?: number;
+  startPage?: number;
+  endPage?: number;
+}
+
+export interface MergeFile {
+  name: string;
+  data: ArrayBuffer;
+}
+
+export interface MergeMessage {
+  command: 'merge';
+  files: MergeFile[];
+  jobs: MergeJob[];
+  cpdfUrl?: string;
+}
+
+export interface MergeSuccessResponse {
+  status: 'success';
+  pdfBytes: ArrayBuffer;
+}
+
+export interface MergeErrorResponse {
+  status: 'error';
+  message: string;
+}
+
+export type MergeResponse = MergeSuccessResponse | MergeErrorResponse;

src/js/types/redact-type.ts

@@ -0,0 +1,7 @@
+export interface RedactionRect {
+  pageIndex: number;
+  canvasX: number;
+  canvasY: number;
+  canvasWidth: number;
+  canvasHeight: number;
+}

src/js/types/sanitize-type.ts

@@ -0,0 +1,8 @@
+import type { PDFDict } from 'pdf-lib';
+
+export interface PDFDocumentInternal {
+  getInfoDict(): PDFDict;
+  javaScripts?: unknown[];
+  embeddedFiles?: unknown[];
+  fonts?: unknown[];
+}

src/js/types/shortcuts-type.ts

@@ -0,0 +1,5 @@
+export interface ToolEntry {
+  id?: string;
+  href?: string;
+  name?: string;
+}

src/js/types/ui-type.ts

@@ -0,0 +1,5 @@
+export interface FileInputOptions {
+  multiple?: boolean;
+  accept?: string;
+  showControls?: boolean;
+}

src/js/types/utils-types.ts

@@ -0,0 +1,235 @@
+import type { PDFName, PDFObject } from 'pdf-lib';
+
+export interface PDFDictLike {
+  keys(): PDFName[];
+  values(): PDFObject[];
+  entries(): [PDFName, PDFObject][];
+  set(key: PDFName, value: PDFObject): void;
+  get(key: PDFName, preservePDFNull?: boolean): PDFObject | undefined;
+  has(key: PDFName): boolean;
+  delete(key: PDFName): boolean;
+  lookup(key: PDFName): PDFObject | undefined;
+  asArray?(): PDFObject[];
+}
+
+export interface WindowWithCoherentPdf {
+  coherentpdf?: unknown;
+}
+
+export interface WindowWithLucide {
+  lucide?: {
+    createIcons(): void;
+  };
+}
+
+export interface WindowWithI18next {
+  i18next?: {
+    t(key: string): string;
+  };
+}
+
+export interface GlobalScopeWithGhostscript {
+  loadGS?: (config: { baseUrl: string }) => Promise<GhostscriptDynamicInstance>;
+  GhostscriptWASM?: new (url: string) => GhostscriptDynamicInstance;
+}
+
+export interface GhostscriptDynamicInstance {
+  convertToPDFA?(pdfBuffer: ArrayBuffer, profile: string): Promise<ArrayBuffer>;
+  fontToOutline?(pdfBuffer: ArrayBuffer): Promise<ArrayBuffer>;
+  init?(): Promise<void>;
+}
+
+export interface PyMuPDFCompressOptions {
+  images: {
+    enabled: boolean;
+    quality: number;
+    dpiTarget: number;
+    dpiThreshold: number;
+    convertToGray: boolean;
+  };
+  scrub: {
+    metadata: boolean;
+    thumbnails: boolean;
+    xmlMetadata?: boolean;
+  };
+  subsetFonts: boolean;
+  save: {
+    garbage: 4;
+    deflate: boolean;
+    clean: boolean;
+    useObjstms: boolean;
+  };
+}
+
+export interface PyMuPDFExtractTextOptions {
+  format?: string;
+  pages?: number[];
+}
+
+export interface PyMuPDFRasterizeOptions {
+  dpi?: number;
+  format?: string;
+  pages?: number[];
+  grayscale?: boolean;
+  quality?: number;
+}
+
+export interface PyMuPDFDocument {
+  pageCount: number;
+  pages: (() => PyMuPDFPage[]) & PyMuPDFPage[];
+  needsPass: boolean;
+  isEncrypted: boolean;
+  authenticate(password: string): boolean;
+  getPage(index: number): PyMuPDFPage;
+  save(): Uint8Array;
+  close(): void;
+  getLayerConfig?(): unknown[];
+  addLayer?(name: string): { number: number; xref: number };
+  setLayerConfig?(layers: unknown[]): void;
+  setLayerVisibility?(xref: number, visible: boolean): void;
+  deleteOCG?(xref: number): void;
+  addOCGWithParent?(
+    name: string,
+    parentXref: number
+  ): { number: number; xref: number };
+  addOCG?(name: string): { number: number; xref: number };
+  applyRedactions?(): void;
+  searchFor?(text: string, pageNum: number): unknown[];
+}
+
+export interface PyMuPDFPage {
+  getText(format?: string): string;
+  getImages(): Array<{ data: Uint8Array; ext: string; xref: number }>;
+  extractTables?(): unknown[];
+  findTables(): Array<{
+    rows: (string | null)[][];
+    markdown: string;
+    rowCount: number;
+    colCount: number;
+  }>;
+  extractImage(xref: number): { data: Uint8Array; ext: string } | null;
+  toSvg?(): string;
+  toPixmap?(options?: { dpi?: number }): {
+    toBlob(format: string, quality?: number): Blob;
+  };
+  addRedactAnnot?(rect: unknown): void;
+  searchFor(text: string): unknown[];
+  addRedaction(rect: unknown, text: string, fill: unknown): void;
+  applyRedactions(): void;
+}
+
+export interface PyMuPDFTextToPdfOptions {
+  fontSize?: number;
+  pageSize?: string;
+  fontName?: string;
+  textColor?: string;
+  margins?: number;
+}
+
+export interface PyMuPDFDeskewOptions {
+  threshold?: number;
+  dpi?: number;
+}
+
+export interface PyMuPDFInstance {
+  load(): Promise<void>;
+  compressPdf(
+    file: Blob,
+    options: PyMuPDFCompressOptions
+  ): Promise<{ blob: Blob; compressedSize: number; usedFallback?: boolean }>;
+  convertToPdf(
+    file: Blob | File,
+    ext: string | { filetype: string }
+  ): Promise<Blob>;
+  extractText(file: Blob, options?: PyMuPDFExtractTextOptions): Promise<string>;
+  extractImages(file: Blob): Promise<Array<{ data: Uint8Array; ext: string }>>;
+  extractTables(file: Blob): Promise<unknown[]>;
+  toSvg(file: Blob, pageNum: number): Promise<string>;
+  renderPageToImage(file: Blob, pageNum: number, scale: number): Promise<Blob>;
+  getPageCount(file: Blob): Promise<number>;
+  rasterizePdf(
+    file: Blob | File,
+    options: PyMuPDFRasterizeOptions
+  ): Promise<Blob>;
+  open(file: Blob | File, password?: string): Promise<PyMuPDFDocument>;
+  textToPdf(text: string, options?: PyMuPDFTextToPdfOptions): Promise<Blob>;
+  pdfToDocx(file: Blob | File): Promise<Blob>;
+  pdfToMarkdown(
+    file: Blob | File,
+    options?: { includeImages?: boolean }
+  ): Promise<string>;
+  pdfToText(file: Blob | File): Promise<string>;
+  deskewPdf(
+    file: Blob,
+    options?: PyMuPDFDeskewOptions
+  ): Promise<{
+    pdf: Blob;
+    result: {
+      totalPages: number;
+      correctedPages: number;
+      angles: number[];
+      corrected: boolean[];
+    };
+  }>;
+  imageToPdf(file: File, options?: { imageType?: string }): Promise<Blob>;
+  imagesToPdf(files: File[]): Promise<Blob>;
+  htmlToPdf(html: string, options: unknown): Promise<Blob>;
+  pdfToLlamaIndex(file: File): Promise<unknown>;
+}
+
+export type { QpdfInstance as QpdfWasmInstance } from '@neslinesli93/qpdf-wasm';
+
+export interface QpdfInstanceExtended {
+  callMain: (args: string[]) => number;
+  FS: EmscriptenFSExtended;
+}
+
+export interface EmscriptenFSExtended {
+  mkdir: (path: string) => void;
+  mount: (
+    type: unknown,
+    opts: { blobs: { name: string; data: Blob }[] },
+    mountPoint: string
+  ) => void;
+  unmount: (mountPoint: string) => void;
+  writeFile: (
+    path: string,
+    data: Uint8Array | string,
+    opts?: { encoding?: string }
+  ) => void;
+  readFile: (path: string, opts?: { encoding?: string }) => Uint8Array;
+  unlink: (path: string) => void;
+  analyzePath: (path: string) => { exists: boolean };
+}
+
+export interface CpdfInstance {
+  setSlow: () => void;
+  fromMemory: (data: Uint8Array, userpw: string) => unknown;
+  isEncrypted: (pdf: unknown) => boolean;
+  decryptPdf: (pdf: unknown, password: string) => void;
+  decryptPdfOwner: (pdf: unknown, password: string) => void;
+  toMemory: (pdf: unknown, linearize: boolean, makeId: boolean) => Uint8Array;
+  deletePdf: (pdf: unknown) => void;
+  startGetBookmarkInfo: (pdf: unknown) => void;
+  numberBookmarks: () => number;
+  getBookmarkLevel: (index: number) => number;
+  getBookmarkPage: (pdf: unknown, index: number) => number;
+  endGetBookmarkInfo: () => void;
+  parsePagespec: (pdf: unknown, pagespec: string) => unknown;
+  removePageLabels: (pdf: unknown) => void;
+  all: (pdf: unknown) => unknown;
+  addPageLabels: (
+    pdf: unknown,
+    style: unknown,
+    prefix: string,
+    offset: number,
+    range: unknown,
+    progress: boolean
+  ) => void;
+  decimalArabic: number;
+  lowercaseRoman: number;
+  uppercaseRoman: number;
+  lowercaseLetters: number;
+  uppercaseLetters: number;
+  noLabelPrefixOnly?: number;
+}

src/js/ui.ts

@@ -1,6 +1,5 @@
 import { resetState } from './state.js';
 import { formatBytes, getPDFDocument } from './utils/helpers.js';
-import { tesseractLanguages } from './config/tesseract-languages.js';
 import {
   renderPagesProgressively,
   cleanupLazyRendering,
@@ -14,6 +13,7 @@ import {
 } from './utils/rotation-state.js';
 import * as pdfjsLib from 'pdfjs-dist';
 import { t } from './i18n/i18n';
+import type { FileInputOptions } from '@/types';
 
 pdfjsLib.GlobalWorkerOptions.workerSrc = new URL(
   'pdfjs-dist/build/pdf.worker.min.mjs',
@@ -112,8 +112,8 @@ export const hideLoader = () => {
 };
 
 export const showAlert = (
-  title: any,
+  title: string,
-  message: any,
+  message: string,
   type: string = 'error',
   callback?: () => void
 ) => {
@@ -137,7 +137,7 @@ export const hideAlert = () => {
   if (dom.alertModal) dom.alertModal.classList.add('hidden');
 };
 
-export const switchView = (view: any) => {
+export const switchView = (view: string) => {
   if (view === 'grid') {
     dom.gridView.classList.remove('hidden');
     dom.toolInterface.classList.add('hidden');
@@ -170,11 +170,13 @@ export const switchView = (view: any) => {
   }
 };
 
-const thumbnailState = {
+const thumbnailState: {
+  sortableInstances: Record<string, Sortable>;
+} = {
   sortableInstances: {},
 };
 
-function initializeOrganizeSortable(containerId: any) {
+function initializeOrganizeSortable(containerId: string) {
   const container = document.getElementById(containerId);
   if (!container) return;
 
@@ -189,10 +191,10 @@ function initializeOrganizeSortable(containerId: any) {
     dragClass: 'sortable-drag',
     filter: '.delete-page-btn',
     preventOnFilter: true,
-    onStart: function (evt: any) {
+    onStart: function (evt: Sortable.SortableEvent) {
       evt.item.style.opacity = '0.5';
     },
-    onEnd: function (evt: any) {
+    onEnd: function (evt: Sortable.SortableEvent) {
       evt.item.style.opacity = '1';
     },
   });
@@ -203,7 +205,10 @@ function initializeOrganizeSortable(containerId: any) {
  * @param {string} toolId The ID of the active tool.
  * @param {object} pdfDoc The loaded pdf-lib document instance.
  */
-export const renderPageThumbnails = async (toolId: any, pdfDoc: any) => {
+export const renderPageThumbnails = async (
+  toolId: string,
+  pdfDoc: { save: () => Promise<Uint8Array> }
+) => {
   const containerId =
     toolId === 'organize'
       ? 'page-organizer'
@@ -229,8 +234,7 @@ export const renderPageThumbnails = async (toolId: any, pdfDoc: any) => {
   // Function to create wrapper element for each page
   const createWrapper = (canvas: HTMLCanvasElement, pageNumber: number) => {
     const wrapper = document.createElement('div');
-    // @ts-expect-error TS(2322) FIXME: Type 'number' is not assignable to type 'string'.
+    wrapper.dataset.pageIndex = String(pageNumber - 1);
-    wrapper.dataset.pageIndex = pageNumber - 1;
 
     const imgContainer = document.createElement('div');
     imgContainer.className = 'relative';
@@ -452,10 +456,10 @@ export const renderPageThumbnails = async (toolId: any, pdfDoc: any) => {
  * @param {HTMLElement} container The DOM element to render the list into.
  * @param {File[]} files The array of file objects.
  */
-export const renderFileDisplay = (container: any, files: any) => {
+export const renderFileDisplay = (container: HTMLElement, files: File[]) => {
   container.textContent = '';
   if (files.length > 0) {
-    files.forEach((file: any) => {
+    files.forEach((file: File) => {
       const fileDiv = document.createElement('div');
       fileDiv.className =
         'flex items-center justify-between bg-gray-700 p-3 rounded-lg text-sm';
@@ -474,13 +478,10 @@ export const renderFileDisplay = (container: any, files: any) => {
   }
 };
 
-const createFileInputHTML = (options = {}) => {
+const createFileInputHTML = (options: FileInputOptions = {}) => {
-  // @ts-expect-error TS(2339) FIXME: Property 'multiple' does not exist on type '{}'.
   const multiple = options.multiple ? 'multiple' : '';
-  // @ts-expect-error TS(2339) FIXME: Property 'accept' does not exist on type '{}'.
   const acceptedFiles = options.accept || 'application/pdf';
-  // @ts-expect-error TS(2339) FIXME: Property 'showControls' does not exist on type '{}... Remove this comment to see the full error message
+  const showControls = options.showControls || false;
-  const showControls = options.showControls || false; // NEW: Add this parameter
 
   return `
         <div id="drop-zone" class="relative flex flex-col items-center justify-center w-full h-48 border-2 border-dashed border-gray-600 rounded-xl cursor-pointer bg-gray-900 hover:bg-gray-700 transition-colors duration-300">

src/js/utils/compress.ts

@@ -69,7 +69,10 @@ export async function performCondenseCompression(
     scrub: {
       metadata: customSettings?.removeMetadata ?? preset.scrub.metadata,
       thumbnails: customSettings?.removeThumbnails ?? preset.scrub.thumbnails,
-      xmlMetadata: (preset.scrub as any).xmlMetadata ?? false,
+      xmlMetadata:
+        ('xmlMetadata' in preset.scrub
+          ? (preset.scrub as { xmlMetadata?: boolean }).xmlMetadata
+          : undefined) ?? false,
     },
     subsetFonts: customSettings?.subsetFonts ?? preset.subsetFonts,
     save: {
@@ -95,8 +98,11 @@ export async function performCondenseCompression(
     try {
       const result = await pymupdf.compressPdf(fileBlob, fallbackOptions);
       return { ...result, usedFallback: true };
-    } catch (fallbackError: any) {
+    } catch (fallbackError: unknown) {
-      const msg = fallbackError?.message || String(fallbackError);
+      const msg =
+        fallbackError instanceof Error
+          ? fallbackError.message
+          : String(fallbackError);
       throw new Error(`PDF compression failed: ${msg}`, {
         cause: fallbackError,
       });

src/js/utils/cpdf-helper.ts

@@ -1,4 +1,5 @@
 import { WasmProvider } from './wasm-provider';
+import type { WindowWithCoherentPdf, CpdfInstance } from '@/types';
 
 let cpdfLoaded = false;
 let cpdfLoadPromise: Promise<void> | null = null;
@@ -31,7 +32,7 @@ export async function isCpdfLoaded(): Promise<void> {
   }
 
   cpdfLoadPromise = new Promise((resolve, reject) => {
-    if (typeof (window as any).coherentpdf !== 'undefined') {
+    if (typeof (window as WindowWithCoherentPdf).coherentpdf !== 'undefined') {
       cpdfLoaded = true;
       resolve();
       return;
@@ -53,7 +54,7 @@ export async function isCpdfLoaded(): Promise<void> {
   return cpdfLoadPromise;
 }
 
-export async function getCpdf(): Promise<any> {
+export async function getCpdf(): Promise<CpdfInstance> {
   await isCpdfLoaded();
-  return (window as any).coherentpdf;
+  return (window as WindowWithCoherentPdf).coherentpdf as CpdfInstance;
 }

src/js/utils/disabled-tools.ts

@@ -27,7 +27,9 @@ export async function loadRuntimeConfig(): Promise<void> {
         (c): c is string => typeof c === 'string'
       );
     }
-  } catch {}
+  } catch {
+    console.error('[LOAD_RUNTIME_CONFIG] Failed to load runtime configuration');
+  }
 }
 
 export function isToolDisabled(toolId: string): boolean {

src/js/utils/ghostscript-dynamic-loader.ts

@@ -1,7 +1,11 @@
 import { WasmProvider } from './wasm-provider.js';
+import type {
+  GlobalScopeWithGhostscript,
+  GhostscriptDynamicInstance,
+} from '@/types';
 
-let cachedGS: any = null;
+let cachedGS: GhostscriptInterface | null = null;
-let loadPromise: Promise<any> | null = null;
+let loadPromise: Promise<GhostscriptInterface> | null = null;
 
 export interface GhostscriptInterface {
   convertToPDFA(pdfBuffer: ArrayBuffer, profile: string): Promise<ArrayBuffer>;
@@ -32,16 +36,20 @@ export async function loadGhostscript(): Promise<GhostscriptInterface> {
 
       await loadScript(wrapperUrl);
 
-      const globalScope =
+      const globalScope = (
-        typeof globalThis !== 'undefined' ? globalThis : window;
+        typeof globalThis !== 'undefined' ? globalThis : window
+      ) as typeof globalThis & GlobalScopeWithGhostscript;
 
-      if (typeof (globalScope as any).loadGS === 'function') {
+      if (typeof globalScope.loadGS === 'function') {
-        cachedGS = await (globalScope as any).loadGS({
+        const instance = await globalScope.loadGS({
           baseUrl: normalizedUrl,
         });
-      } else if (typeof (globalScope as any).GhostscriptWASM === 'function') {
+        cachedGS = instance as unknown as GhostscriptInterface;
-        cachedGS = new (globalScope as any).GhostscriptWASM(normalizedUrl);
+      } else if (typeof globalScope.GhostscriptWASM === 'function') {
-        await cachedGS.init?.();
+        const instance: GhostscriptDynamicInstance =
+          new globalScope.GhostscriptWASM(normalizedUrl);
+        await instance.init?.();
+        cachedGS = instance as unknown as GhostscriptInterface;
       } else {
         throw new Error(
           'Ghostscript wrapper did not expose expected interface. Expected loadGS() or GhostscriptWASM class.'
@@ -49,10 +57,11 @@ export async function loadGhostscript(): Promise<GhostscriptInterface> {
       }
 
       return cachedGS;
-    } catch (error: any) {
+    } catch (error: unknown) {
       loadPromise = null;
+      const msg = error instanceof Error ? error.message : String(error);
       throw new Error(
-        `Failed to load Ghostscript from ${normalizedUrl}: ${error.message}`,
+        `Failed to load Ghostscript from ${normalizedUrl}: ${msg}`,
         { cause: error }
       );
     }

src/js/utils/helpers.ts

@@ -1,8 +1,10 @@
 import createModule from '@neslinesli93/qpdf-wasm';
+import type { QpdfInstanceExtended } from '@/types';
 import { showLoader, hideLoader, showAlert } from '../ui.js';
 import { createIcons } from 'lucide';
 import { state, resetState } from '../state.js';
 import * as pdfjsLib from 'pdfjs-dist';
+import type { DocumentInitParameters } from 'pdfjs-dist/types/src/display/api';
 
 const STANDARD_SIZES = {
   A4: { width: 595.28, height: 841.89 },
@@ -13,7 +15,7 @@ const STANDARD_SIZES = {
   A5: { width: 419.53, height: 595.28 },
 };
 
-export function getStandardPageName(width: any, height: any) {
+export function getStandardPageName(width: number, height: number) {
   const tolerance = 1; // Allow for minor floating point variations
   for (const [name, size] of Object.entries(STANDARD_SIZES)) {
     if (
@@ -28,7 +30,7 @@ export function getStandardPageName(width: any, height: any) {
   return 'Custom';
 }
 
-export function convertPoints(points: any, unit: any) {
+export function convertPoints(points: number, unit: string) {
   let result: number;
   switch (unit) {
     case 'in':
@@ -59,7 +61,7 @@ export function hexToRgb(hex: string): { r: number; g: number; b: number } {
     : { r: 0, g: 0, b: 0 };
 }
 
-export const formatBytes = (bytes: any, decimals = 1) => {
+export const formatBytes = (bytes: number, decimals = 1) => {
   if (bytes === 0) return '0 Bytes';
   const k = 1024;
   const dm = decimals < 0 ? 0 : decimals;
@@ -79,10 +81,12 @@ export const downloadFile = (blob: Blob, filename: string): void => {
   URL.revokeObjectURL(url);
 };
 
-export const readFileAsArrayBuffer = (file: any) => {
+export const readFileAsArrayBuffer = (
+  file: Blob
+): Promise<ArrayBuffer | null> => {
   return new Promise((resolve, reject) => {
     const reader = new FileReader();
-    reader.onload = () => resolve(reader.result);
+    reader.onload = () => resolve(reader.result as ArrayBuffer | null);
     reader.onerror = (error) => reject(error);
     reader.readAsArrayBuffer(file);
   });
@@ -139,7 +143,7 @@ export function parsePageRanges(
  * @param {string} isoDateString - The ISO 8601 date string.
  * @returns {string} A localized date and time string, or the original string if parsing fails.
  */
-export function formatIsoDate(isoDateString) {
+export function formatIsoDate(isoDateString: string) {
   if (!isoDateString || typeof isoDateString !== 'string') {
     return isoDateString; // Return original value if it's not a valid string
   }
@@ -156,20 +160,20 @@ export function formatIsoDate(isoDateString) {
   }
 }
 
-let qpdfInstance: any = null;
+let qpdfInstance: QpdfInstanceExtended | null = null;
 
 /**
  * Initialize qpdf-wasm singleton.
  * Subsequent calls return the same instance.
  */
-export async function initializeQpdf() {
+export async function initializeQpdf(): Promise<QpdfInstanceExtended> {
   if (qpdfInstance) return qpdfInstance;
 
   showLoader('Initializing PDF engine...');
   try {
-    qpdfInstance = await createModule({
+    qpdfInstance = (await createModule({
       locateFile: () => import.meta.env.BASE_URL + 'qpdf.wasm',
-    });
+    })) as unknown as QpdfInstanceExtended;
   } catch (error) {
     console.error('Failed to initialize qpdf-wasm:', error);
     showAlert(
@@ -267,24 +271,19 @@ export function resetAndReloadTool(preResetCallback?: () => void) {
  * @param src The source to load (url string, typed array, or parameters object)
  * @returns The PDF loading task
  */
-export function getPDFDocument(src: any) {
+export function getPDFDocument(
-  let params = src;
+  src: string | Uint8Array | ArrayBuffer | DocumentInitParameters
+) {
+  let params: DocumentInitParameters;
 
-  // Handle different input types similar to how getDocument handles them,
-  // but we ensure we have an object to attach wasmUrl to.
   if (typeof src === 'string') {
     params = { url: src };
   } else if (src instanceof Uint8Array || src instanceof ArrayBuffer) {
     params = { data: src };
+  } else {
+    params = src;
   }
 
-  // Ensure params is an object
-  if (typeof params !== 'object' || params === null) {
-    params = {};
-  }
-
-  // Add wasmUrl pointing to our public/wasm directory
-  // This is required for PDF.js v5+ to load OpenJPEG for certain images
   return pdfjsLib.getDocument({
     ...params,
     wasmUrl: import.meta.env.BASE_URL + 'pdfjs-viewer/wasm/',
@@ -413,7 +412,7 @@ export function formatRawDate(raw: string): string {
         year,
         hoursStr,
         minsStr,
-        secsStr,
+        _secsStr,
         timezone,
       ] = match;
 
@@ -455,8 +454,8 @@ export function formatRawDate(raw: string): string {
 
       return `${fullDay}, ${fullMonth} ${dom}, ${year} at ${hours}:${minsStr} ${ampm} (${formattedTz})`;
     }
-  } catch (e) {
+  } catch {
-    // Fallback to raw string if parsing fails
+    console.error('Error parsing date string:', raw);
   }
   return raw;
 }

src/js/utils/libreoffice-loader.ts

@@ -6,6 +6,7 @@
  */
 
 import { WorkerBrowserConverter } from '@matbee/libreoffice-converter/browser';
+import type { InputFormat } from '@matbee/libreoffice-converter/browser';
 
 const LIBREOFFICE_LOCAL_PATH = import.meta.env.BASE_URL + 'libreoffice-wasm/';
 
@@ -35,17 +36,20 @@ export class LibreOfficeConverter {
 
     if (this.initializing) {
       while (this.initializing) {
-                await new Promise(r => setTimeout(r, 100));
+        await new Promise((r) => setTimeout(r, 100));
       }
       return;
     }
 
-
     this.initializing = true;
     let progressCallback = onProgress; // Store original callback
 
     try {
-            progressCallback?.({ phase: 'loading', percent: 0, message: 'Loading conversion engine...' });
+      progressCallback?.({
+        phase: 'loading',
+        percent: 0,
+        message: 'Loading conversion engine...',
+      });
 
       this.converter = new WorkerBrowserConverter({
         sofficeJs: `${this.basePath}soffice.js`,
@@ -54,13 +58,17 @@ export class LibreOfficeConverter {
         sofficeWorkerJs: `${this.basePath}soffice.worker.js`,
         browserWorkerJs: `${this.basePath}browser.worker.global.js`,
         verbose: false,
-                onProgress: (info: { phase: string; percent: number; message: string }) => {
+        onProgress: (info: {
+          phase: string;
+          percent: number;
+          message: string;
+        }) => {
           if (progressCallback && !this.initialized) {
             const simplifiedMessage = `Loading conversion engine (${Math.round(info.percent)}%)...`;
             progressCallback({
               phase: info.phase as LoadProgress['phase'],
               percent: info.percent,
-                            message: simplifiedMessage
+              message: simplifiedMessage,
             });
           }
         },
@@ -76,7 +84,11 @@ export class LibreOfficeConverter {
       this.initialized = true;
 
       // Call completion message
-            progressCallback?.({ phase: 'ready', percent: 100, message: 'Conversion engine ready!' });
+      progressCallback?.({
+        phase: 'ready',
+        percent: 100,
+        message: 'Conversion engine ready!',
+      });
 
       // Null out the callback to prevent any late-firing progress updates
       progressCallback = undefined;
@@ -95,7 +107,9 @@ export class LibreOfficeConverter {
     }
 
     console.log(`[LibreOffice] Converting ${file.name} to PDF...`);
-        console.log(`[LibreOffice] File type: ${file.type}, Size: ${file.size} bytes`);
+    console.log(
+      `[LibreOffice] File type: ${file.type}, Size: ${file.size} bytes`
+    );
 
     try {
       console.log(`[LibreOffice] Reading file as ArrayBuffer...`);
@@ -110,13 +124,19 @@ export class LibreOfficeConverter {
       const ext = file.name.split('.').pop()?.toLowerCase() || '';
       console.log(`[LibreOffice] Detected format from extension: ${ext}`);
 
-            const result = await this.converter.convert(uint8Array, {
+      const result = await this.converter.convert(
+        uint8Array,
+        {
           outputFormat: 'pdf',
-                inputFormat: ext as any, // Explicitly specify format for CSV import filters
+          inputFormat: ext as InputFormat,
-            }, file.name);
+        },
+        file.name
+      );
 
       const duration = Date.now() - startTime;
-            console.log(`[LibreOffice] Conversion complete! Duration: ${duration}ms, Size: ${result.data.length} bytes`);
+      console.log(
+        `[LibreOffice] Conversion complete! Duration: ${duration}ms, Size: ${result.data.length} bytes`
+      );
 
       // Create a copy to avoid SharedArrayBuffer type issues
       const data = new Uint8Array(result.data);
@@ -125,7 +145,7 @@ export class LibreOfficeConverter {
       console.error(`[LibreOffice] Conversion FAILED for ${file.name}:`, error);
       console.error(`[LibreOffice] Error details:`, {
         message: error instanceof Error ? error.message : String(error),
-                stack: error instanceof Error ? error.stack : undefined
+        stack: error instanceof Error ? error.stack : undefined,
       });
       throw error;
     }
@@ -152,7 +172,9 @@ export class LibreOfficeConverter {
   }
 }
 
-export function getLibreOfficeConverter(basePath?: string): LibreOfficeConverter {
+export function getLibreOfficeConverter(
+  basePath?: string
+): LibreOfficeConverter {
   if (!converterInstance) {
     converterInstance = new LibreOfficeConverter(basePath);
   }

src/js/utils/markdown-editor.ts

@@ -29,8 +29,14 @@ import taskLists from 'markdown-it-task-lists';
 import anchor from 'markdown-it-anchor';
 import tocDoneRight from 'markdown-it-toc-done-right';
 import { applyTranslations } from '../i18n/i18n';
-
+import type {
-
+  WindowWithLucide,
+  WindowWithI18next,
+  MarkdownItOptions,
+  MarkdownItToken,
+  MarkdownItRendererSelf,
+  MarkdownItRenderRule,
+} from '@/types';
 
 // Register highlight.js languages
 hljs.registerLanguage('javascript', javascript);
@@ -66,18 +72,7 @@ export interface MarkdownEditorOptions {
   onBack?: () => void;
 }
 
-export interface MarkdownItOptions {
+export type { MarkdownItOptions } from '@/types';
-  /** Enable HTML tags in source */
-  html: boolean;
-  /** Convert '\n' in paragraphs into <br> */
-  breaks: boolean;
-  /** Autoconvert URL-like text to links */
-  linkify: boolean;
-  /** Enable some language-neutral replacement + quotes beautification */
-  typographer: boolean;
-  /** Highlight function for fenced code blocks */
-  highlight?: (str: string, lang: string) => string;
-}
 
 const DEFAULT_MARKDOWN = `# Welcome to BentoPDF Markdown Editor
 
@@ -277,7 +272,7 @@ export class MarkdownEditor {
     html: true,
     breaks: false,
     linkify: true,
-    typographer: true
+    typographer: true,
   };
 
   constructor(container: HTMLElement, options: MarkdownEditorOptions) {
@@ -303,22 +298,36 @@ export class MarkdownEditor {
         startOnLoad: false,
         theme: 'default',
         securityLevel: 'loose',
-        fontFamily: '-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif'
+        fontFamily:
+          '-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif',
       });
       this.mermaidInitialized = true;
     }
   }
 
   private configureLinkRenderer(): void {
-    // Override link renderer to add target="_blank" and rel="noopener"
+    const existingRule = this.md.renderer.rules.link_open;
-    const defaultRender = this.md.renderer.rules.link_open ||
+    const defaultRender: MarkdownItRenderRule = existingRule
-      ((tokens: any[], idx: number, options: any, _env: any, self: any) => self.renderToken(tokens, idx, options));
+      ? (existingRule as unknown as MarkdownItRenderRule)
+      : (
+          tokens: MarkdownItToken[],
+          idx: number,
+          options: MarkdownItOptions,
+          env: unknown,
+          self: MarkdownItRendererSelf
+        ) => self.renderToken(tokens, idx, options);
 
-    this.md.renderer.rules.link_open = (tokens: any[], idx: number, options: any, env: any, self: any) => {
+    this.md.renderer.rules.link_open = (tokens, idx, options, env, self) => {
-      const token = tokens[idx];
+      const token = tokens[idx] as unknown as MarkdownItToken;
       token.attrSet('target', '_blank');
       token.attrSet('rel', 'noopener noreferrer');
-      return defaultRender(tokens, idx, options, env, self);
+      return defaultRender(
+        tokens as unknown as MarkdownItToken[],
+        idx,
+        options as unknown as MarkdownItOptions,
+        env as unknown,
+        self as unknown as MarkdownItRendererSelf
+      );
     };
   }
 
@@ -417,12 +426,11 @@ export class MarkdownEditor {
     this.applyI18n();
 
     // Initialize Lucide icons
-    if (typeof (window as any).lucide !== 'undefined') {
+    if (typeof (window as WindowWithLucide).lucide !== 'undefined') {
-      (window as any).lucide.createIcons();
+      (window as WindowWithLucide).lucide?.createIcons();
     }
   }
 
-
   private setupEventListeners(): void {
     // Editor input
     this.editor?.addEventListener('input', () => {
@@ -441,9 +449,13 @@ export class MarkdownEditor {
     this.editor?.addEventListener('scroll', () => {
       if (this.syncScroll && !this.isSyncing && this.editor && this.preview) {
         this.isSyncing = true;
-        const scrollPercentage = this.editor.scrollTop / (this.editor.scrollHeight - this.editor.clientHeight);
+        const scrollPercentage =
-        this.preview.scrollTop = scrollPercentage * (this.preview.scrollHeight - this.preview.clientHeight);
+          this.editor.scrollTop /
-        setTimeout(() => this.isSyncing = false, 10);
+          (this.editor.scrollHeight - this.editor.clientHeight);
+        this.preview.scrollTop =
+          scrollPercentage *
+          (this.preview.scrollHeight - this.preview.clientHeight);
+        setTimeout(() => (this.isSyncing = false), 10);
       }
     });
 
@@ -451,9 +463,13 @@ export class MarkdownEditor {
     this.preview?.addEventListener('scroll', () => {
       if (this.syncScroll && !this.isSyncing && this.editor && this.preview) {
         this.isSyncing = true;
-        const scrollPercentage = this.preview.scrollTop / (this.preview.scrollHeight - this.preview.clientHeight);
+        const scrollPercentage =
-        this.editor.scrollTop = scrollPercentage * (this.editor.scrollHeight - this.editor.clientHeight);
+          this.preview.scrollTop /
-        setTimeout(() => this.isSyncing = false, 10);
+          (this.preview.scrollHeight - this.preview.clientHeight);
+        this.editor.scrollTop =
+          scrollPercentage *
+          (this.editor.scrollHeight - this.editor.clientHeight);
+        setTimeout(() => (this.isSyncing = false), 10);
       }
     });
 
@@ -474,7 +490,9 @@ export class MarkdownEditor {
     });
 
     // Settings modal close
-    document.getElementById('mdCloseSettings')?.addEventListener('click', () => {
+    document
+      .getElementById('mdCloseSettings')
+      ?.addEventListener('click', () => {
         const modal = document.getElementById('mdSettingsModal');
         if (modal) {
           modal.style.display = 'none';
@@ -482,8 +500,14 @@ export class MarkdownEditor {
       });
 
     // Close modal on overlay click
-    document.getElementById('mdSettingsModal')?.addEventListener('click', (e) => {
+    document
-      if ((e.target as HTMLElement).classList.contains('md-editor-modal-overlay')) {
+      .getElementById('mdSettingsModal')
+      ?.addEventListener('click', (e) => {
+        if (
+          (e.target as HTMLElement).classList.contains(
+            'md-editor-modal-overlay'
+          )
+        ) {
           const modal = document.getElementById('mdSettingsModal');
           if (modal) {
             modal.style.display = 'none';
@@ -507,7 +531,9 @@ export class MarkdownEditor {
       this.updateMarkdownIt();
     });
 
-    document.getElementById('mdOptTypographer')?.addEventListener('change', (e) => {
+    document
+      .getElementById('mdOptTypographer')
+      ?.addEventListener('change', (e) => {
         this.mdOptions.typographer = (e.target as HTMLInputElement).checked;
         this.updateMarkdownIt();
       });
@@ -549,7 +575,8 @@ export class MarkdownEditor {
         const start = this.editor!.selectionStart;
         const end = this.editor!.selectionEnd;
         const value = this.editor!.value;
-        this.editor!.value = value.substring(0, start) + '  ' + value.substring(end);
+        this.editor!.value =
+          value.substring(0, start) + '  ' + value.substring(end);
         this.editor!.selectionStart = this.editor!.selectionEnd = start + 2;
         this.updatePreview();
       }
@@ -563,18 +590,37 @@ export class MarkdownEditor {
 
     // Update options based on preset
     if (preset === 'commonmark') {
-      this.mdOptions = { html: false, breaks: false, linkify: false, typographer: false };
+      this.mdOptions = {
+        html: false,
+        breaks: false,
+        linkify: false,
+        typographer: false,
+      };
     } else if (preset === 'zero') {
-      this.mdOptions = { html: false, breaks: false, linkify: false, typographer: false };
+      this.mdOptions = {
+        html: false,
+        breaks: false,
+        linkify: false,
+        typographer: false,
+      };
     } else {
-      this.mdOptions = { html: true, breaks: false, linkify: true, typographer: true };
+      this.mdOptions = {
+        html: true,
+        breaks: false,
+        linkify: true,
+        typographer: true,
+      };
     }
 
     // Update UI checkboxes
-    (document.getElementById('mdOptHtml') as HTMLInputElement).checked = this.mdOptions.html;
+    (document.getElementById('mdOptHtml') as HTMLInputElement).checked =
-    (document.getElementById('mdOptBreaks') as HTMLInputElement).checked = this.mdOptions.breaks;
+      this.mdOptions.html;
-    (document.getElementById('mdOptLinkify') as HTMLInputElement).checked = this.mdOptions.linkify;
+    (document.getElementById('mdOptBreaks') as HTMLInputElement).checked =
-    (document.getElementById('mdOptTypographer') as HTMLInputElement).checked = this.mdOptions.typographer;
+      this.mdOptions.breaks;
+    (document.getElementById('mdOptLinkify') as HTMLInputElement).checked =
+      this.mdOptions.linkify;
+    (document.getElementById('mdOptTypographer') as HTMLInputElement).checked =
+      this.mdOptions.typographer;
 
     this.updateMarkdownIt();
   }
@@ -588,7 +634,6 @@ export class MarkdownEditor {
     }
   }
 
-
   private createMarkdownIt(): MarkdownIt {
     // Use preset if commonmark or zero
     let md: MarkdownIt;
@@ -604,13 +649,16 @@ export class MarkdownEditor {
         highlight: (str: string, lang: string) => {
           if (lang && hljs.getLanguage(lang)) {
             try {
-              return hljs.highlight(str, { language: lang, ignoreIllegals: true }).value;
+              return hljs.highlight(str, {
+                language: lang,
+                ignoreIllegals: true,
+              }).value;
             } catch {
               // Fall through to default
             }
           }
           return ''; // Use external default escaping
-        }
+        },
       });
     }
 
@@ -650,7 +698,9 @@ export class MarkdownEditor {
   private async renderMermaidDiagrams(): Promise<void> {
     if (!this.preview) return;
 
-    const mermaidBlocks = this.preview.querySelectorAll('pre > code.language-mermaid');
+    const mermaidBlocks = this.preview.querySelectorAll(
+      'pre > code.language-mermaid'
+    );
 
     for (let i = 0; i < mermaidBlocks.length; i++) {
       const block = mermaidBlocks[i] as HTMLElement;
@@ -948,14 +998,16 @@ ${content}
     applyTranslations();
 
     // Special handling for select options (data-i18n on options doesn't work with applyTranslations)
-    const presetSelect = document.getElementById('mdPreset') as HTMLSelectElement;
+    const presetSelect = document.getElementById(
+      'mdPreset'
+    ) as HTMLSelectElement;
     if (presetSelect) {
       const options = presetSelect.querySelectorAll('option[data-i18n]');
       options.forEach((option) => {
         const key = option.getAttribute('data-i18n');
         if (key) {
           // Use i18next directly for option text
-          const translated = (window as any).i18next?.t(key);
+          const translated = (window as WindowWithI18next).i18next?.t(key);
           if (translated && translated !== key) {
             option.textContent = translated;
           }

src/js/utils/page-preview.ts

@@ -154,7 +154,7 @@ document.addEventListener('keydown', handleKeydown);
 export function initPagePreview(
   container: HTMLElement,
   pdfjsDoc: PDFDocumentProxy,
-  options: { pageAttr?: string } = {}
+  _options: { pageAttr?: string } = {}
 ): void {
   const totalPages = pdfjsDoc.numPages;
 

src/js/utils/pdf-decrypt.ts

@@ -1,5 +1,6 @@
 import { getCpdf, isCpdfAvailable } from './cpdf-helper';
 import { isPyMuPDFAvailable, loadPyMuPDF } from './pymupdf-loader';
+import type { CpdfInstance } from '@/types';
 
 export type PdfDecryptEngine = 'cpdf' | 'pymupdf';
 
@@ -37,13 +38,13 @@ function copyBytes(bytes: Uint8Array): Uint8Array {
   return Uint8Array.from(bytes);
 }
 
-function cleanupCpdfDocument(cpdf: unknown, pdf: unknown): void {
+function cleanupCpdfDocument(cpdf: CpdfInstance, pdf: unknown): void {
-  if (!cpdf || !pdf || typeof cpdf !== 'object' || !('deletePdf' in cpdf)) {
+  if (!cpdf || !pdf) {
     return;
   }
 
   try {
-    (cpdf as { deletePdf: (document: unknown) => void }).deletePdf(pdf);
+    cpdf.deletePdf(pdf);
   } catch (cleanupError) {
     console.warn(
       `${DECRYPT_LOG_PREFIX} Failed to cleanup CoherentPDF document: ${normalizeErrorMessage(cleanupError)}`