- Refactor PDF loading across workflow nodes to use loadPdfDocument utility

- Replaced direct calls to PDFDocument.load with loadPdfDocument in multiple nodes to standardize PDF loading process.

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

@@ -2,13 +2,13 @@ import { AddAttachmentState } from '@/types';
 import { showLoader, hideLoader, showAlert } from '../ui.js';
 import { downloadFile, formatBytes } from '../utils/helpers.js';
 import { createIcons, icons } from 'lucide';
-import { PDFDocument as PDFLibDocument } from 'pdf-lib';
 import { isCpdfAvailable } from '../utils/cpdf-helper.js';
 import {
   showWasmRequiredDialog,
   WasmProvider,
 } from '../utils/wasm-provider.js';
 import { loadPdfWithPasswordPrompt } from '../utils/password-prompt.js';
+import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
 const worker = new Worker(
   import.meta.env.BASE_URL + 'workers/add-attachments.worker.js'
@@ -139,9 +139,7 @@ async function updateUI() {
       pageState.file = result.file;
       showLoader('Loading PDF...');
 
-      pageState.pdfDoc = await PDFLibDocument.load(result.bytes, {
-        ignoreEncryption: true,
-      });
+      pageState.pdfDoc = await loadPdfDocument(result.bytes);
 
       const pageCount = pageState.pdfDoc.getPageCount();
       metaSpan.textContent = `${formatBytes(pageState.file.size)} • ${pageCount} pages`;

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

@@ -4,6 +4,7 @@ import { createIcons, icons } from 'lucide';
 import { PDFDocument as PDFLibDocument } from 'pdf-lib';
 import { loadPdfWithPasswordPrompt } from '../utils/password-prompt.js';
 import { AddBlankPageState } from '@/types';
+import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
 const pageState: AddBlankPageState = {
   file: null,
@@ -84,8 +85,7 @@ async function updateUI() {
       }
       showLoader('Loading PDF...');
       pageState.file = result.file;
-      pageState.pdfDoc = await PDFLibDocument.load(result.bytes, {
-        ignoreEncryption: true,
+      pageState.pdfDoc = await loadPdfDocument(result.bytes, {
         throwOnInvalidObject: false,
       });
       result.pdf.destroy();

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

@@ -1,5 +1,4 @@
 import { createIcons, icons } from 'lucide';
-import { PDFDocument } from 'pdf-lib';
 import type {
   AddPageLabelsState,
   LabelRule,
@@ -19,6 +18,7 @@ import {
   normalizePageLabelStartValue,
   resolvePageLabelStyle,
 } from '../utils/page-labels.js';
+import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
 type AddPageLabelsCpdf = {
   setSlow?: () => void;
@@ -174,8 +174,7 @@ async function handleFiles(files: FileList) {
   showLoader(translate('tools:addPageLabels.loadingPdf', 'Loading PDF...'));
   try {
     const arrayBuffer = await readFileAsArrayBuffer(file);
-    const pdfDoc = await PDFDocument.load(arrayBuffer as ArrayBuffer, {
-      ignoreEncryption: true,
+    const pdfDoc = await loadPdfDocument(arrayBuffer as ArrayBuffer, {
       throwOnInvalidObject: false,
     });
 

src/js/logic/add-stamps.ts

@@ -175,7 +175,9 @@ async function loadPdfInViewer(file: File) {
       enablePermissions: false,
     };
     localStorage.setItem('pdfjs.preferences', JSON.stringify(newPrefs));
-  } catch {}
+  } catch (e) {
+    console.warn('Failed to update pdfjs.preferences in localStorage', e);
+  }
 
   const iframe = document.createElement('iframe');
   iframe.className = 'w-full h-full border-0';
@@ -221,7 +223,12 @@ function setupAnnotationViewer(iframe: HTMLIFrameElement) {
                 'editorStampButton'
               ) as HTMLButtonElement | null;
               stampBtn?.click();
-            } catch {}
+            } catch (e) {
+              console.warn(
+                'Failed to auto-click stamp button in annotation editor',
+                e
+              );
+            }
           });
         }
 

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

@@ -15,6 +15,7 @@ import {
 import { AddWatermarkState, PageWatermarkConfig } from '@/types';
 import * as pdfjsLib from 'pdfjs-dist';
 import { loadPdfWithPasswordPrompt } from '../utils/password-prompt.js';
+import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
 pdfjsLib.GlobalWorkerOptions.workerSrc = new URL(
   'pdfjs-dist/build/pdf.worker.min.mjs',
@@ -121,7 +122,7 @@ async function handleFiles(files: FileList) {
     if (!result) return;
     showLoader('Loading PDF...');
     const pdfBytes = new Uint8Array(result.bytes);
-    pageState.pdfDoc = await PDFLibDocument.load(pdfBytes);
+    pageState.pdfDoc = await loadPdfDocument(pdfBytes);
     pageState.file = result.file;
     pageState.pdfBytes = pdfBytes;
 

src/js/logic/background-color-page.ts

@@ -4,6 +4,7 @@ import { downloadFile, hexToRgb, formatBytes } from '../utils/helpers.js';
 import { PDFDocument as PDFLibDocument, rgb } from 'pdf-lib';
 import { BackgroundColorState } from '@/types';
 import { loadPdfWithPasswordPrompt } from '../utils/password-prompt.js';
+import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
 const pageState: BackgroundColorState = { file: null, pdfDoc: null };
 
@@ -63,9 +64,7 @@ async function handleFiles(files: FileList) {
     if (!result) return;
     showLoader('Loading PDF...');
     result.pdf.destroy();
-    pageState.pdfDoc = await PDFLibDocument.load(result.bytes, {
-      ignoreEncryption: true,
-    });
+    pageState.pdfDoc = await loadPdfDocument(result.bytes);
     pageState.file = result.file;
     updateFileDisplay();
     document.getElementById('options-panel')?.classList.remove('hidden');

src/js/logic/bates-numbering-page.ts

@@ -1,11 +1,12 @@
 import { createIcons, icons } from 'lucide';
 import { showAlert, showLoader, hideLoader } from '../ui.js';
 import { downloadFile, hexToRgb, formatBytes } from '../utils/helpers.js';
-import { PDFDocument, StandardFonts, rgb } from 'pdf-lib';
+import { StandardFonts, rgb } from 'pdf-lib';
 import { loadPdfWithPasswordPrompt } from '../utils/password-prompt.js';
 import JSZip from 'jszip';
 import Sortable from 'sortablejs';
 import { FileEntry, Position, StylePreset } from '@/types';
+import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
 const FONT_MAP: Record<string, keyof typeof StandardFonts> = {
   Helvetica: 'Helvetica',
@@ -184,9 +185,7 @@ async function handleFiles(fileList: FileList) {
       if (!result) continue;
       showLoader('Loading PDFs...');
       result.pdf.destroy();
-      const pdfDoc = await PDFDocument.load(result.bytes, {
-        ignoreEncryption: true,
-      });
+      const pdfDoc = await loadPdfDocument(result.bytes);
       files.push({ file: result.file, pageCount: pdfDoc.getPageCount() });
     }
 
@@ -475,7 +474,7 @@ async function applyBatesNumbers() {
 
     for (const entry of files) {
       const arrayBuffer = await entry.file.arrayBuffer();
-      const pdfDoc = await PDFDocument.load(arrayBuffer);
+      const pdfDoc = await loadPdfDocument(arrayBuffer);
       const font = await pdfDoc.embedFont(StandardFonts[fontName]);
       const pages = pdfDoc.getPages();
       const fileName = entry.file.name.replace(/\.pdf$/i, '');

src/js/logic/bookmark-pdf.ts

@@ -14,6 +14,7 @@ import {
   hexToRgb,
 } from '../utils/helpers.js';
 import { loadPdfWithPasswordPrompt } from '../utils/password-prompt.js';
+import { loadPdfDocument } from '../utils/load-pdf-document.js';
 import {
   BookmarkNode,
   BookmarkTree,
@@ -1240,7 +1241,7 @@ async function loadPDF(e?: Event): Promise<void> {
   selectedBookmarks.clear();
   collapsedNodes.clear();
 
-  pdfLibDoc = await PDFDocument.load(result.bytes, { ignoreEncryption: true });
+  pdfLibDoc = await loadPdfDocument(result.bytes, { ignoreEncryption: true });
   pdfJsDoc = result.pdf;
 
   if (gotoPageInput) gotoPageInput.max = String(pdfJsDoc.numPages);

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

@@ -1,283 +1,330 @@
 import { showAlert } from '../ui.js';
-import { downloadFile, formatBytes, initializeQpdf, readFileAsArrayBuffer } from '../utils/helpers.js';
+import {
+  downloadFile,
+  formatBytes,
+  initializeQpdf,
+  readFileAsArrayBuffer,
+} from '../utils/helpers.js';
 import { icons, createIcons } from 'lucide';
 import { ChangePermissionsState } from '@/types';
 
 const pageState: ChangePermissionsState = {
-    file: null,
+  file: null,
 };
 
 function resetState() {
-    pageState.file = null;
+  pageState.file = null;
 
-    const fileDisplayArea = document.getElementById('file-display-area');
-    if (fileDisplayArea) fileDisplayArea.innerHTML = '';
+  const fileDisplayArea = document.getElementById('file-display-area');
+  if (fileDisplayArea) fileDisplayArea.innerHTML = '';
 
-    const toolOptions = document.getElementById('tool-options');
-    if (toolOptions) toolOptions.classList.add('hidden');
+  const toolOptions = document.getElementById('tool-options');
+  if (toolOptions) toolOptions.classList.add('hidden');
 
-    const fileInput = document.getElementById('file-input') as HTMLInputElement;
-    if (fileInput) fileInput.value = '';
+  const fileInput = document.getElementById('file-input') as HTMLInputElement;
+  if (fileInput) fileInput.value = '';
 
-    const currentPassword = document.getElementById('current-password') as HTMLInputElement;
-    if (currentPassword) currentPassword.value = '';
+  const currentPassword = document.getElementById(
+    'current-password'
+  ) as HTMLInputElement;
+  if (currentPassword) currentPassword.value = '';
 
-    const newUserPassword = document.getElementById('new-user-password') as HTMLInputElement;
-    if (newUserPassword) newUserPassword.value = '';
+  const newUserPassword = document.getElementById(
+    'new-user-password'
+  ) as HTMLInputElement;
+  if (newUserPassword) newUserPassword.value = '';
 
-    const newOwnerPassword = document.getElementById('new-owner-password') as HTMLInputElement;
-    if (newOwnerPassword) newOwnerPassword.value = '';
+  const newOwnerPassword = document.getElementById(
+    'new-owner-password'
+  ) as HTMLInputElement;
+  if (newOwnerPassword) newOwnerPassword.value = '';
 }
 
 async function updateUI() {
-    const fileDisplayArea = document.getElementById('file-display-area');
-    const toolOptions = document.getElementById('tool-options');
+  const fileDisplayArea = document.getElementById('file-display-area');
+  const toolOptions = document.getElementById('tool-options');
 
-    if (!fileDisplayArea) return;
+  if (!fileDisplayArea) return;
 
-    fileDisplayArea.innerHTML = '';
+  fileDisplayArea.innerHTML = '';
 
-    if (pageState.file) {
-        const fileDiv = document.createElement('div');
-        fileDiv.className = 'flex items-center justify-between bg-gray-700 p-3 rounded-lg text-sm';
+  if (pageState.file) {
+    const fileDiv = document.createElement('div');
+    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 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.textContent = pageState.file.name;
+    const nameSpan = document.createElement('div');
+    nameSpan.className = 'truncate font-medium text-gray-200 text-sm mb-1';
+    nameSpan.textContent = pageState.file.name;
 
-        const metaSpan = document.createElement('div');
-        metaSpan.className = 'text-xs text-gray-400';
-        metaSpan.textContent = formatBytes(pageState.file.size);
+    const metaSpan = document.createElement('div');
+    metaSpan.className = 'text-xs text-gray-400';
+    metaSpan.textContent = formatBytes(pageState.file.size);
 
-        infoContainer.append(nameSpan, metaSpan);
+    infoContainer.append(nameSpan, metaSpan);
 
-        const removeBtn = document.createElement('button');
-        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 = function () {
-            resetState();
-        };
+    const removeBtn = document.createElement('button');
+    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 = function () {
+      resetState();
+    };
 
-        fileDiv.append(infoContainer, removeBtn);
-        fileDisplayArea.appendChild(fileDiv);
-        createIcons({ icons });
+    fileDiv.append(infoContainer, removeBtn);
+    fileDisplayArea.appendChild(fileDiv);
+    createIcons({ icons });
 
-        if (toolOptions) toolOptions.classList.remove('hidden');
-    } else {
-        if (toolOptions) toolOptions.classList.add('hidden');
-    }
+    if (toolOptions) toolOptions.classList.remove('hidden');
+  } else {
+    if (toolOptions) toolOptions.classList.add('hidden');
+  }
 }
 
 function handleFileSelect(files: FileList | null) {
-    if (files && files.length > 0) {
-        const file = files[0];
-        if (file.type === 'application/pdf' || file.name.toLowerCase().endsWith('.pdf')) {
-            pageState.file = file;
-            updateUI();
-        }
+  if (files && files.length > 0) {
+    const file = files[0];
+    if (
+      file.type === 'application/pdf' ||
+      file.name.toLowerCase().endsWith('.pdf')
+    ) {
+      pageState.file = file;
+      updateUI();
     }
+  }
 }
 
 async function changePermissions() {
-    if (!pageState.file) {
-        showAlert('No File', 'Please upload a PDF file first.');
-        return;
+  if (!pageState.file) {
+    showAlert('No File', 'Please upload a PDF file first.');
+    return;
+  }
+
+  const currentPassword =
+    (document.getElementById('current-password') as HTMLInputElement)?.value ||
+    '';
+  const newUserPassword =
+    (document.getElementById('new-user-password') as HTMLInputElement)?.value ||
+    '';
+  const newOwnerPassword =
+    (document.getElementById('new-owner-password') as HTMLInputElement)
+      ?.value || '';
+
+  const inputPath = '/input.pdf';
+  const outputPath = '/output.pdf';
+  let qpdf: any;
+
+  const loaderModal = document.getElementById('loader-modal');
+  const loaderText = document.getElementById('loader-text');
+
+  try {
+    if (loaderModal) loaderModal.classList.remove('hidden');
+    if (loaderText) loaderText.textContent = 'Initializing...';
+
+    qpdf = await initializeQpdf();
+
+    if (loaderText) loaderText.textContent = 'Reading PDF...';
+    const fileBuffer = await readFileAsArrayBuffer(pageState.file);
+    const uint8Array = new Uint8Array(fileBuffer as ArrayBuffer);
+    qpdf.FS.writeFile(inputPath, uint8Array);
+
+    if (loaderText) loaderText.textContent = 'Processing PDF permissions...';
+
+    const args = [inputPath];
+
+    if (currentPassword) {
+      args.push('--password=' + currentPassword);
     }
 
-    const currentPassword = (document.getElementById('current-password') as HTMLInputElement)?.value || '';
-    const newUserPassword = (document.getElementById('new-user-password') as HTMLInputElement)?.value || '';
-    const newOwnerPassword = (document.getElementById('new-owner-password') as HTMLInputElement)?.value || '';
+    const shouldEncrypt = newUserPassword || newOwnerPassword;
 
-    const inputPath = '/input.pdf';
-    const outputPath = '/output.pdf';
-    let qpdf: any;
+    if (shouldEncrypt) {
+      const finalUserPassword = newUserPassword;
+      const finalOwnerPassword = newOwnerPassword;
 
-    const loaderModal = document.getElementById('loader-modal');
-    const loaderText = document.getElementById('loader-text');
+      args.push('--encrypt', finalUserPassword, finalOwnerPassword, '256');
 
+      const allowPrinting = (
+        document.getElementById('allow-printing') as HTMLInputElement
+      )?.checked;
+      const allowCopying = (
+        document.getElementById('allow-copying') as HTMLInputElement
+      )?.checked;
+      const allowModifying = (
+        document.getElementById('allow-modifying') as HTMLInputElement
+      )?.checked;
+      const allowAnnotating = (
+        document.getElementById('allow-annotating') as HTMLInputElement
+      )?.checked;
+      const allowFillingForms = (
+        document.getElementById('allow-filling-forms') as HTMLInputElement
+      )?.checked;
+      const allowDocumentAssembly = (
+        document.getElementById('allow-document-assembly') as HTMLInputElement
+      )?.checked;
+      const allowPageExtraction = (
+        document.getElementById('allow-page-extraction') as HTMLInputElement
+      )?.checked;
+
+      if (finalOwnerPassword) {
+        if (!allowModifying) args.push('--modify=none');
+        if (!allowCopying) args.push('--extract=n');
+        if (!allowPrinting) args.push('--print=none');
+        if (!allowAnnotating) args.push('--annotate=n');
+        if (!allowDocumentAssembly) args.push('--assemble=n');
+        if (!allowFillingForms) args.push('--form=n');
+        if (!allowPageExtraction) args.push('--extract=n');
+        if (!allowModifying) args.push('--modify-other=n');
+      } else if (finalUserPassword) {
+        args.push('--allow-insecure');
+      }
+    } else {
+      args.push('--decrypt');
+    }
+
+    args.push('--', outputPath);
     try {
-        if (loaderModal) loaderModal.classList.remove('hidden');
-        if (loaderText) loaderText.textContent = 'Initializing...';
+      qpdf.callMain(args);
+    } catch (qpdfError: any) {
+      console.error('qpdf execution error:', qpdfError);
 
-        qpdf = await initializeQpdf();
+      const errorMsg = qpdfError.message || '';
 
-        if (loaderText) loaderText.textContent = 'Reading PDF...';
-        const fileBuffer = await readFileAsArrayBuffer(pageState.file);
-        const uint8Array = new Uint8Array(fileBuffer as ArrayBuffer);
-        qpdf.FS.writeFile(inputPath, uint8Array);
+      if (
+        errorMsg.includes('invalid password') ||
+        errorMsg.includes('incorrect password') ||
+        errorMsg.includes('password')
+      ) {
+        throw new Error('INVALID_PASSWORD', { cause: qpdfError });
+      }
 
-        if (loaderText) loaderText.textContent = 'Processing PDF permissions...';
+      if (
+        errorMsg.includes('encrypted') ||
+        errorMsg.includes('password required')
+      ) {
+        throw new Error('PASSWORD_REQUIRED', { cause: qpdfError });
+      }
 
-        const args = [inputPath];
-
-        if (currentPassword) {
-            args.push('--password=' + currentPassword);
-        }
-
-        const shouldEncrypt = newUserPassword || newOwnerPassword;
-
-        if (shouldEncrypt) {
-            const finalUserPassword = newUserPassword;
-            const finalOwnerPassword = newOwnerPassword;
-
-            args.push('--encrypt', finalUserPassword, finalOwnerPassword, '256');
-
-            const allowPrinting = (document.getElementById('allow-printing') as HTMLInputElement)?.checked;
-            const allowCopying = (document.getElementById('allow-copying') as HTMLInputElement)?.checked;
-            const allowModifying = (document.getElementById('allow-modifying') as HTMLInputElement)?.checked;
-            const allowAnnotating = (document.getElementById('allow-annotating') as HTMLInputElement)?.checked;
-            const allowFillingForms = (document.getElementById('allow-filling-forms') as HTMLInputElement)?.checked;
-            const allowDocumentAssembly = (document.getElementById('allow-document-assembly') as HTMLInputElement)?.checked;
-            const allowPageExtraction = (document.getElementById('allow-page-extraction') as HTMLInputElement)?.checked;
-
-            if (finalOwnerPassword) {
-                if (!allowModifying) args.push('--modify=none');
-                if (!allowCopying) args.push('--extract=n');
-                if (!allowPrinting) args.push('--print=none');
-                if (!allowAnnotating) args.push('--annotate=n');
-                if (!allowDocumentAssembly) args.push('--assemble=n');
-                if (!allowFillingForms) args.push('--form=n');
-                if (!allowPageExtraction) args.push('--extract=n');
-                if (!allowModifying) args.push('--modify-other=n');
-            } else if (finalUserPassword) {
-                args.push('--allow-insecure');
-            }
-        } else {
-            args.push('--decrypt');
-        }
-
-        args.push('--', outputPath);
-        try {
-            qpdf.callMain(args);
-        } catch (qpdfError: any) {
-            console.error('qpdf execution error:', qpdfError);
-
-            const errorMsg = qpdfError.message || '';
-
-            if (
-                errorMsg.includes('invalid password') ||
-                errorMsg.includes('incorrect password') ||
-                errorMsg.includes('password')
-            ) {
-                throw new Error('INVALID_PASSWORD');
-            }
-
-            if (
-                errorMsg.includes('encrypted') ||
-                errorMsg.includes('password required')
-            ) {
-                throw new Error('PASSWORD_REQUIRED');
-            }
-
-            throw new Error('Processing failed: ' + errorMsg || 'Unknown error');
-        }
-
-        if (loaderText) loaderText.textContent = 'Preparing download...';
-        const outputFile = qpdf.FS.readFile(outputPath, { encoding: 'binary' });
-
-        if (!outputFile || outputFile.length === 0) {
-            throw new Error('Processing resulted in an empty file.');
-        }
-
-        const blob = new Blob([outputFile], { type: 'application/pdf' });
-        downloadFile(blob, `permissions-changed-${pageState.file.name}`);
-
-        if (loaderModal) loaderModal.classList.add('hidden');
-
-        let successMessage = 'PDF permissions changed successfully!';
-        if (!shouldEncrypt) {
-            successMessage = 'PDF decrypted successfully! All encryption and restrictions removed.';
-        }
-
-        showAlert('Success', successMessage, 'success', () => { resetState(); });
-    } catch (error: any) {
-        console.error('Error during PDF permission change:', error);
-        if (loaderModal) loaderModal.classList.add('hidden');
-
-        if (error.message === 'INVALID_PASSWORD') {
-            showAlert(
-                'Incorrect Password',
-                'The current password you entered is incorrect. Please try again.'
-            );
-        } else if (error.message === 'PASSWORD_REQUIRED') {
-            showAlert(
-                'Password Required',
-                'This PDF is password-protected. Please enter the current password to proceed.'
-            );
-        } else {
-            showAlert(
-                'Processing Failed',
-                `An error occurred: ${error.message || 'The PDF might be corrupted or password protected.'}`
-            );
-        }
-    } finally {
-        try {
-            if (qpdf?.FS) {
-                try {
-                    qpdf.FS.unlink(inputPath);
-                } catch (e) { }
-                try {
-                    qpdf.FS.unlink(outputPath);
-                } catch (e) { }
-            }
-        } catch (cleanupError) {
-            console.warn('Failed to cleanup WASM FS:', cleanupError);
-        }
+      throw new Error('Processing failed: ' + errorMsg || 'Unknown error', {
+        cause: qpdfError,
+      });
     }
+
+    if (loaderText) loaderText.textContent = 'Preparing download...';
+    const outputFile = qpdf.FS.readFile(outputPath, { encoding: 'binary' });
+
+    if (!outputFile || outputFile.length === 0) {
+      throw new Error('Processing resulted in an empty file.');
+    }
+
+    const blob = new Blob([outputFile], { type: 'application/pdf' });
+    downloadFile(blob, `permissions-changed-${pageState.file.name}`);
+
+    if (loaderModal) loaderModal.classList.add('hidden');
+
+    let successMessage = 'PDF permissions changed successfully!';
+    if (!shouldEncrypt) {
+      successMessage =
+        'PDF decrypted successfully! All encryption and restrictions removed.';
+    }
+
+    showAlert('Success', successMessage, 'success', () => {
+      resetState();
+    });
+  } catch (error: any) {
+    console.error('Error during PDF permission change:', error);
+    if (loaderModal) loaderModal.classList.add('hidden');
+
+    if (error.message === 'INVALID_PASSWORD') {
+      showAlert(
+        'Incorrect Password',
+        'The current password you entered is incorrect. Please try again.'
+      );
+    } else if (error.message === 'PASSWORD_REQUIRED') {
+      showAlert(
+        'Password Required',
+        'This PDF is password-protected. Please enter the current password to proceed.'
+      );
+    } else {
+      showAlert(
+        'Processing Failed',
+        `An error occurred: ${error.message || 'The PDF might be corrupted or password protected.'}`
+      );
+    }
+  } finally {
+    try {
+      if (qpdf?.FS) {
+        try {
+          qpdf.FS.unlink(inputPath);
+        } catch (e) {
+          console.warn('Failed to unlink input file from WASM FS', e);
+        }
+        try {
+          qpdf.FS.unlink(outputPath);
+        } catch (e) {
+          console.warn('Failed to unlink output file from WASM FS', e);
+        }
+      }
+    } catch (cleanupError) {
+      console.warn('Failed to cleanup WASM FS:', cleanupError);
+    }
+  }
 }
 
 document.addEventListener('DOMContentLoaded', function () {
-    const fileInput = document.getElementById('file-input') as HTMLInputElement;
-    const dropZone = document.getElementById('drop-zone');
-    const processBtn = document.getElementById('process-btn');
-    const backBtn = document.getElementById('back-to-tools');
+  const fileInput = document.getElementById('file-input') as HTMLInputElement;
+  const dropZone = document.getElementById('drop-zone');
+  const processBtn = document.getElementById('process-btn');
+  const backBtn = document.getElementById('back-to-tools');
 
-    if (backBtn) {
-        backBtn.addEventListener('click', function () {
-            window.location.href = import.meta.env.BASE_URL;
+  if (backBtn) {
+    backBtn.addEventListener('click', function () {
+      window.location.href = import.meta.env.BASE_URL;
+    });
+  }
+
+  if (fileInput && dropZone) {
+    fileInput.addEventListener('change', function (e) {
+      handleFileSelect((e.target as HTMLInputElement).files);
+    });
+
+    dropZone.addEventListener('dragover', function (e) {
+      e.preventDefault();
+      dropZone.classList.add('bg-gray-700');
+    });
+
+    dropZone.addEventListener('dragleave', function (e) {
+      e.preventDefault();
+      dropZone.classList.remove('bg-gray-700');
+    });
+
+    dropZone.addEventListener('drop', function (e) {
+      e.preventDefault();
+      dropZone.classList.remove('bg-gray-700');
+      const files = e.dataTransfer?.files;
+      if (files && files.length > 0) {
+        const pdfFiles = Array.from(files).filter(function (f) {
+          return (
+            f.type === 'application/pdf' ||
+            f.name.toLowerCase().endsWith('.pdf')
+          );
         });
-    }
+        if (pdfFiles.length > 0) {
+          const dataTransfer = new DataTransfer();
+          dataTransfer.items.add(pdfFiles[0]);
+          handleFileSelect(dataTransfer.files);
+        }
+      }
+    });
 
-    if (fileInput && dropZone) {
-        fileInput.addEventListener('change', function (e) {
-            handleFileSelect((e.target as HTMLInputElement).files);
-        });
+    fileInput.addEventListener('click', function () {
+      fileInput.value = '';
+    });
+  }
 
-        dropZone.addEventListener('dragover', function (e) {
-            e.preventDefault();
-            dropZone.classList.add('bg-gray-700');
-        });
-
-        dropZone.addEventListener('dragleave', function (e) {
-            e.preventDefault();
-            dropZone.classList.remove('bg-gray-700');
-        });
-
-        dropZone.addEventListener('drop', function (e) {
-            e.preventDefault();
-            dropZone.classList.remove('bg-gray-700');
-            const files = e.dataTransfer?.files;
-            if (files && files.length > 0) {
-                const pdfFiles = Array.from(files).filter(function (f) {
-                    return f.type === 'application/pdf' || f.name.toLowerCase().endsWith('.pdf');
-                });
-                if (pdfFiles.length > 0) {
-                    const dataTransfer = new DataTransfer();
-                    dataTransfer.items.add(pdfFiles[0]);
-                    handleFileSelect(dataTransfer.files);
-                }
-            }
-        });
-
-        fileInput.addEventListener('click', function () {
-            fileInput.value = '';
-        });
-    }
-
-    if (processBtn) {
-        processBtn.addEventListener('click', changePermissions);
-    }
+  if (processBtn) {
+    processBtn.addEventListener('click', changePermissions);
+  }
 });

src/js/logic/combine-single-page-page.ts

@@ -10,6 +10,7 @@ import { PDFDocument as PDFLibDocument, rgb } from 'pdf-lib';
 import * as pdfjsLib from 'pdfjs-dist';
 import { CombineSinglePageState } from '@/types';
 import { loadPdfWithPasswordPrompt } from '../utils/password-prompt.js';
+import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
 pdfjsLib.GlobalWorkerOptions.workerSrc = new URL(
   'pdfjs-dist/build/pdf.worker.min.mjs',
@@ -81,8 +82,7 @@ async function updateUI() {
       showLoader('Loading PDF...');
       result.pdf.destroy();
       pageState.file = result.file;
-      pageState.pdfDoc = await PDFLibDocument.load(result.bytes, {
-        ignoreEncryption: true,
+      pageState.pdfDoc = await loadPdfDocument(result.bytes, {
         throwOnInvalidObject: false,
       });
       hideLoader();

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

@@ -6,6 +6,7 @@ import Cropper from 'cropperjs';
 import * as pdfjsLib from 'pdfjs-dist';
 import { PDFDocument as PDFLibDocument } from 'pdf-lib';
 import { CropperState } from '@/types';
+import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
 pdfjsLib.GlobalWorkerOptions.workerSrc = new URL(
   'pdfjs-dist/build/pdf.worker.min.mjs',
@@ -305,10 +306,9 @@ async function performCrop() {
 async function performMetadataCrop(
   cropData: Record<number, any>
 ): Promise<Uint8Array> {
-  const pdfToModify = await PDFLibDocument.load(
-    cropperState.originalPdfBytes!,
-    { throwOnInvalidObject: false }
-  );
+  const pdfToModify = await loadPdfDocument(cropperState.originalPdfBytes!, {
+    throwOnInvalidObject: false,
+  });
 
   for (const pageNum in cropData) {
     const pdfJsPage = await cropperState.pdfDoc.getPage(Number(pageNum));
@@ -349,7 +349,7 @@ async function performFlatteningCrop(
   cropData: Record<number, any>
 ): Promise<Uint8Array> {
   const newPdfDoc = await PDFLibDocument.create();
-  const sourcePdfDocForCopying = await PDFLibDocument.load(
+  const sourcePdfDocForCopying = await loadPdfDocument(
     cropperState.originalPdfBytes!,
     { throwOnInvalidObject: false }
   );

src/js/logic/cropper.ts

@@ -1,11 +1,19 @@
 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';
 import Cropper from 'cropperjs';
 import * as pdfjsLib from 'pdfjs-dist';
 import { PDFDocument as PDFLibDocument } from 'pdf-lib';
+import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
-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();
 
 // --- Global State for the Cropper Tool ---
 const cropperState = {
@@ -145,21 +153,21 @@ async function performMetadataCrop(pdfToModify: any, cropData: any) {
 
     // Define the 4 corners of the crop rectangle in visual coordinates (Top-Left origin)
     const visualCorners = [
-      { x: cropX, y: cropY },                   // TL
-      { x: cropX + cropW, y: cropY },           // TR
-      { x: cropX + cropW, y: cropY + cropH },   // BR
-      { x: cropX, y: cropY + cropH },           // BL
+      { x: cropX, y: cropY }, // TL
+      { x: cropX + cropW, y: cropY }, // TR
+      { x: cropX + cropW, y: cropY + cropH }, // BR
+      { x: cropX, y: cropY + cropH }, // BL
     ];
 
     // This handles rotation, media box offsets, and coordinate system flips automatically
-    const pdfCorners = visualCorners.map(p => {
+    const pdfCorners = visualCorners.map((p) => {
       return viewport.convertToPdfPoint(p.x, p.y);
     });
 
     // Find the bounding box of the converted points in PDF coordinates
     // convertToPdfPoint returns [x, y] arrays
-    const pdfXs = pdfCorners.map(p => p[0]);
-    const pdfYs = pdfCorners.map(p => p[1]);
+    const pdfXs = pdfCorners.map((p) => p[0]);
+    const pdfYs = pdfCorners.map((p) => p[1]);
 
     const minX = Math.min(...pdfXs);
     const maxX = Math.max(...pdfXs);
@@ -179,9 +187,9 @@ async function performFlatteningCrop(cropData: any) {
   const newPdfDoc = await PDFLibDocument.create();
 
   // Load the original PDF with pdf-lib to copy un-cropped pages from
-  const sourcePdfDocForCopying = await PDFLibDocument.load(
-    cropperState.originalPdfBytes, 
-    {ignoreEncryption: true, throwOnInvalidObject: false}
+  const sourcePdfDocForCopying = await loadPdfDocument(
+    cropperState.originalPdfBytes,
+    { ignoreEncryption: true, throwOnInvalidObject: false }
   );
   const totalPages = cropperState.pdfDoc.numPages;
 
@@ -224,7 +232,11 @@ async function performFlatteningCrop(cropData: any) {
       const jpegQuality = 0.9;
 
       const jpegBytes = await new Promise((res) =>
-        finalCanvas.toBlob((blob) => blob.arrayBuffer().then(res), 'image/jpeg', jpegQuality)
+        finalCanvas.toBlob(
+          (blob) => blob.arrayBuffer().then(res),
+          'image/jpeg',
+          jpegQuality
+        )
       );
       const embeddedImage = await newPdfDoc.embedJpg(jpegBytes as ArrayBuffer);
       const newPage = newPdfDoc.addPage([finalWidth, finalHeight]);
@@ -273,80 +285,73 @@ export async function setupCropperTool() {
     .getElementById('next-page')
     .addEventListener('click', () => changePage(1));
 
-  document
-    .getElementById('crop-button')
-    .addEventListener('click', async () => {
-      // Get the last known crop from the active page before processing
-      saveCurrentCrop();
+  document.getElementById('crop-button').addEventListener('click', async () => {
+    // Get the last known crop from the active page before processing
+    saveCurrentCrop();
 
-      const isDestructive = (
-        document.getElementById('destructive-crop-toggle') as HTMLInputElement
-      ).checked;
-      const isApplyToAll = (
-        document.getElementById('apply-to-all-toggle') as HTMLInputElement
-      ).checked;
+    const isDestructive = (
+      document.getElementById('destructive-crop-toggle') as HTMLInputElement
+    ).checked;
+    const isApplyToAll = (
+      document.getElementById('apply-to-all-toggle') as HTMLInputElement
+    ).checked;
 
-      let finalCropData = {};
-      if (isApplyToAll) {
-        const currentCrop =
-          cropperState.pageCrops[cropperState.currentPageNum];
-        if (!currentCrop) {
-          showAlert('No Crop Area', 'Please select an area to crop first.');
-          return;
-        }
-        // Apply the active page's crop to all pages
-        for (let i = 1; i <= cropperState.pdfDoc.numPages; i++) {
-          finalCropData[i] = currentCrop;
-        }
-      } else {
-        // If not applying to all, only process pages with saved crops
-        finalCropData = Object.keys(cropperState.pageCrops).reduce(
-          (obj, key) => {
-            obj[key] = cropperState.pageCrops[key];
-            return obj;
-          },
-          {}
-        );
-      }
-
-      if (Object.keys(finalCropData).length === 0) {
-        showAlert(
-          'No Crop Area',
-          'Please select an area on at least one page to crop.'
-        );
+    let finalCropData = {};
+    if (isApplyToAll) {
+      const currentCrop = cropperState.pageCrops[cropperState.currentPageNum];
+      if (!currentCrop) {
+        showAlert('No Crop Area', 'Please select an area to crop first.');
         return;
       }
-
-      showLoader('Applying crop...');
-
-      try {
-        let finalPdfBytes;
-        if (isDestructive) {
-          const newPdfDoc = await performFlatteningCrop(finalCropData);
-          finalPdfBytes = await newPdfDoc.save();
-        } else {
-          const pdfToModify = await PDFLibDocument.load(
-            cropperState.originalPdfBytes,
-            {ignoreEncryption: true, throwOnInvalidObject: false}
-          );
-          await performMetadataCrop(pdfToModify, finalCropData);
-          finalPdfBytes = await pdfToModify.save();
-        }
-
-        const fileName = isDestructive
-          ? 'flattened_crop.pdf'
-          : 'standard_crop.pdf';
-        downloadFile(
-          new Blob([finalPdfBytes], { type: 'application/pdf' }),
-          fileName
-        );
-        showAlert('Success', 'Crop complete! Your download has started.');
-      } catch (e) {
-        console.error(e);
-        showAlert('Error', 'An error occurred during cropping.');
-      } finally {
-        hideLoader();
+      // Apply the active page's crop to all pages
+      for (let i = 1; i <= cropperState.pdfDoc.numPages; i++) {
+        finalCropData[i] = currentCrop;
       }
-    });
+    } else {
+      // If not applying to all, only process pages with saved crops
+      finalCropData = Object.keys(cropperState.pageCrops).reduce((obj, key) => {
+        obj[key] = cropperState.pageCrops[key];
+        return obj;
+      });
+    }
 
+    if (Object.keys(finalCropData).length === 0) {
+      showAlert(
+        'No Crop Area',
+        'Please select an area on at least one page to crop.'
+      );
+      return;
+    }
+
+    showLoader('Applying crop...');
+
+    try {
+      let finalPdfBytes;
+      if (isDestructive) {
+        const newPdfDoc = await performFlatteningCrop(finalCropData);
+        finalPdfBytes = await newPdfDoc.save();
+      } else {
+        const pdfToModify = await loadPdfDocument(
+          cropperState.originalPdfBytes,
+          { ignoreEncryption: true, throwOnInvalidObject: false }
+        );
+        await performMetadataCrop(pdfToModify, finalCropData);
+        finalPdfBytes = await pdfToModify.save();
+      }
+
+      const fileName = isDestructive
+        ? 'flattened_crop.pdf'
+        : 'standard_crop.pdf';
+      downloadFile(
+        new Blob([finalPdfBytes], { type: 'application/pdf' }),
+        fileName
+      );
+      showAlert('Success', 'Crop complete! Your download has started.');
+    } catch (e) {
+      console.error(e);
+      showAlert('Error', 'An error occurred during cropping.');
+    } finally {
+      hideLoader();
+    }
+  });
 }

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

@@ -5,11 +5,11 @@ import {
   downloadFile,
   parsePageRanges,
 } from '../utils/helpers.js';
-import { PDFDocument } from 'pdf-lib';
 import { loadPdfWithPasswordPrompt } from '../utils/password-prompt.js';
 import { deletePdfPages } from '../utils/pdf-operations.js';
 import * as pdfjsLib from 'pdfjs-dist';
 import { DeletePagesState } from '@/types';
+import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
 pdfjsLib.GlobalWorkerOptions.workerSrc = new URL(
   'pdfjs-dist/build/pdf.worker.min.mjs',
@@ -94,8 +94,7 @@ async function handleFile(file: File) {
     }
     showLoader('Loading PDF...');
     deleteState.file = result.file;
-    deleteState.pdfDoc = await PDFDocument.load(result.bytes, {
-      ignoreEncryption: true,
+    deleteState.pdfDoc = await loadPdfDocument(result.bytes, {
       throwOnInvalidObject: false,
     });
     deleteState.pdfJsDoc = result.pdf;
@@ -272,7 +271,7 @@ async function deletePages() {
     );
     const baseName = deleteState.file?.name.replace('.pdf', '') || 'document';
     downloadFile(
-      new Blob([resultBytes as unknown as BlobPart], {
+      new Blob([new Uint8Array(resultBytes)], {
         type: 'application/pdf',
       }),
       `${baseName}_pages_removed.pdf`

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

@@ -8,6 +8,7 @@ import {
 import { createIcons, icons } from 'lucide';
 import { PDFDocument as PDFLibDocument } from 'pdf-lib';
 import { loadPdfWithPasswordPrompt } from '../utils/password-prompt.js';
+import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
 const pageState: DividePagesState = {
   file: null,
@@ -87,9 +88,7 @@ async function updateUI() {
       pageState.file = result.file;
       showLoader('Loading PDF...');
 
-      pageState.pdfDoc = await PDFLibDocument.load(result.bytes, {
-        ignoreEncryption: true,
-      });
+      pageState.pdfDoc = await loadPdfDocument(result.bytes);
       pageState.totalPages = pageState.pdfDoc.getPageCount();
       hideLoader();
 

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

@@ -2,8 +2,9 @@ import { EditMetadataState } from '@/types';
 import { showLoader, hideLoader, showAlert } from '../ui.js';
 import { downloadFile, formatBytes } from '../utils/helpers.js';
 import { createIcons, icons } from 'lucide';
-import { PDFDocument as PDFLibDocument, PDFName, PDFString } from 'pdf-lib';
+import { PDFName, PDFString } from 'pdf-lib';
 import { loadPdfWithPasswordPrompt } from '../utils/password-prompt.js';
+import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
 const pageState: EditMetadataState = {
   file: null,
@@ -228,8 +229,7 @@ async function updateUI() {
       showLoader('Loading PDF...');
       result.pdf.destroy();
       pageState.file = result.file;
-      pageState.pdfDoc = await PDFLibDocument.load(result.bytes, {
-        ignoreEncryption: true,
+      pageState.pdfDoc = await loadPdfDocument(result.bytes, {
         throwOnInvalidObject: false,
       });
       hideLoader();

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

@@ -207,7 +207,7 @@ export function renderEmailToHtml(
 ): string {
   const { includeCcBcc = true, includeAttachments = true } = options;
 
-  let processedHtml = '';
+  let processedHtml: string;
   if (email.htmlBody) {
     const sanitizedHtml = sanitizeEmailHtml(email.htmlBody);
     processedHtml = processInlineImages(sanitizedHtml, email.attachments);

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

@@ -1,243 +1,267 @@
 import { showAlert } from '../ui.js';
-import { downloadFile, formatBytes, initializeQpdf, readFileAsArrayBuffer } from '../utils/helpers.js';
+import {
+  downloadFile,
+  formatBytes,
+  initializeQpdf,
+  readFileAsArrayBuffer,
+} from '../utils/helpers.js';
 import { icons, createIcons } from 'lucide';
 import { EncryptPdfState } from '@/types';
 
 const pageState: EncryptPdfState = {
-    file: null,
+  file: null,
 };
 
 function resetState() {
-    pageState.file = null;
+  pageState.file = null;
 
-    const fileDisplayArea = document.getElementById('file-display-area');
-    if (fileDisplayArea) fileDisplayArea.innerHTML = '';
+  const fileDisplayArea = document.getElementById('file-display-area');
+  if (fileDisplayArea) fileDisplayArea.innerHTML = '';
 
-    const toolOptions = document.getElementById('tool-options');
-    if (toolOptions) toolOptions.classList.add('hidden');
+  const toolOptions = document.getElementById('tool-options');
+  if (toolOptions) toolOptions.classList.add('hidden');
 
-    const fileInput = document.getElementById('file-input') as HTMLInputElement;
-    if (fileInput) fileInput.value = '';
+  const fileInput = document.getElementById('file-input') as HTMLInputElement;
+  if (fileInput) fileInput.value = '';
 
-    const userPasswordInput = document.getElementById('user-password-input') as HTMLInputElement;
-    if (userPasswordInput) userPasswordInput.value = '';
+  const userPasswordInput = document.getElementById(
+    'user-password-input'
+  ) as HTMLInputElement;
+  if (userPasswordInput) userPasswordInput.value = '';
 
-    const ownerPasswordInput = document.getElementById('owner-password-input') as HTMLInputElement;
-    if (ownerPasswordInput) ownerPasswordInput.value = '';
+  const ownerPasswordInput = document.getElementById(
+    'owner-password-input'
+  ) as HTMLInputElement;
+  if (ownerPasswordInput) ownerPasswordInput.value = '';
 }
 
 async function updateUI() {
-    const fileDisplayArea = document.getElementById('file-display-area');
-    const toolOptions = document.getElementById('tool-options');
+  const fileDisplayArea = document.getElementById('file-display-area');
+  const toolOptions = document.getElementById('tool-options');
 
-    if (!fileDisplayArea) return;
+  if (!fileDisplayArea) return;
 
-    fileDisplayArea.innerHTML = '';
+  fileDisplayArea.innerHTML = '';
 
-    if (pageState.file) {
-        const fileDiv = document.createElement('div');
-        fileDiv.className = 'flex items-center justify-between bg-gray-700 p-3 rounded-lg text-sm';
+  if (pageState.file) {
+    const fileDiv = document.createElement('div');
+    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 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.textContent = pageState.file.name;
+    const nameSpan = document.createElement('div');
+    nameSpan.className = 'truncate font-medium text-gray-200 text-sm mb-1';
+    nameSpan.textContent = pageState.file.name;
 
-        const metaSpan = document.createElement('div');
-        metaSpan.className = 'text-xs text-gray-400';
-        metaSpan.textContent = formatBytes(pageState.file.size);
+    const metaSpan = document.createElement('div');
+    metaSpan.className = 'text-xs text-gray-400';
+    metaSpan.textContent = formatBytes(pageState.file.size);
 
-        infoContainer.append(nameSpan, metaSpan);
+    infoContainer.append(nameSpan, metaSpan);
 
-        const removeBtn = document.createElement('button');
-        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 = function () {
-            resetState();
-        };
+    const removeBtn = document.createElement('button');
+    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 = function () {
+      resetState();
+    };
 
-        fileDiv.append(infoContainer, removeBtn);
-        fileDisplayArea.appendChild(fileDiv);
-        createIcons({ icons });
+    fileDiv.append(infoContainer, removeBtn);
+    fileDisplayArea.appendChild(fileDiv);
+    createIcons({ icons });
 
-        if (toolOptions) toolOptions.classList.remove('hidden');
-    } else {
-        if (toolOptions) toolOptions.classList.add('hidden');
-    }
+    if (toolOptions) toolOptions.classList.remove('hidden');
+  } else {
+    if (toolOptions) toolOptions.classList.add('hidden');
+  }
 }
 
 function handleFileSelect(files: FileList | null) {
-    if (files && files.length > 0) {
-        const file = files[0];
-        if (file.type === 'application/pdf' || file.name.toLowerCase().endsWith('.pdf')) {
-            pageState.file = file;
-            updateUI();
-        }
+  if (files && files.length > 0) {
+    const file = files[0];
+    if (
+      file.type === 'application/pdf' ||
+      file.name.toLowerCase().endsWith('.pdf')
+    ) {
+      pageState.file = file;
+      updateUI();
     }
+  }
 }
 
 async function encryptPdf() {
-    if (!pageState.file) {
-        showAlert('No File', 'Please upload a PDF file first.');
-        return;
+  if (!pageState.file) {
+    showAlert('No File', 'Please upload a PDF file first.');
+    return;
+  }
+
+  const userPassword =
+    (document.getElementById('user-password-input') as HTMLInputElement)
+      ?.value || '';
+  const ownerPasswordInput =
+    (document.getElementById('owner-password-input') as HTMLInputElement)
+      ?.value || '';
+
+  if (!userPassword) {
+    showAlert('Input Required', 'Please enter a user password.');
+    return;
+  }
+
+  const ownerPassword = ownerPasswordInput || userPassword;
+  const hasDistinctOwnerPassword = ownerPasswordInput !== '';
+
+  const inputPath = '/input.pdf';
+  const outputPath = '/output.pdf';
+  let qpdf: any;
+
+  const loaderModal = document.getElementById('loader-modal');
+  const loaderText = document.getElementById('loader-text');
+
+  try {
+    if (loaderModal) loaderModal.classList.remove('hidden');
+    if (loaderText) loaderText.textContent = 'Initializing encryption...';
+
+    qpdf = await initializeQpdf();
+
+    if (loaderText) loaderText.textContent = 'Reading PDF...';
+    const fileBuffer = await readFileAsArrayBuffer(pageState.file);
+    const uint8Array = new Uint8Array(fileBuffer as ArrayBuffer);
+
+    qpdf.FS.writeFile(inputPath, uint8Array);
+
+    if (loaderText)
+      loaderText.textContent = 'Encrypting PDF with 256-bit AES...';
+
+    const args = [inputPath, '--encrypt', userPassword, ownerPassword, '256'];
+
+    // Only add restrictions if a distinct owner password was provided
+    if (hasDistinctOwnerPassword) {
+      args.push(
+        '--modify=none',
+        '--extract=n',
+        '--print=none',
+        '--accessibility=n',
+        '--annotate=n',
+        '--assemble=n',
+        '--form=n',
+        '--modify-other=n'
+      );
     }
 
-    const userPassword = (document.getElementById('user-password-input') as HTMLInputElement)?.value || '';
-    const ownerPasswordInput = (document.getElementById('owner-password-input') as HTMLInputElement)?.value || '';
-
-    if (!userPassword) {
-        showAlert('Input Required', 'Please enter a user password.');
-        return;
-    }
-
-    const ownerPassword = ownerPasswordInput || userPassword;
-    const hasDistinctOwnerPassword = ownerPasswordInput !== '';
-
-    const inputPath = '/input.pdf';
-    const outputPath = '/output.pdf';
-    let qpdf: any;
-
-    const loaderModal = document.getElementById('loader-modal');
-    const loaderText = document.getElementById('loader-text');
+    args.push('--', outputPath);
 
     try {
-        if (loaderModal) loaderModal.classList.remove('hidden');
-        if (loaderText) loaderText.textContent = 'Initializing encryption...';
-
-        qpdf = await initializeQpdf();
-
-        if (loaderText) loaderText.textContent = 'Reading PDF...';
-        const fileBuffer = await readFileAsArrayBuffer(pageState.file);
-        const uint8Array = new Uint8Array(fileBuffer as ArrayBuffer);
-
-        qpdf.FS.writeFile(inputPath, uint8Array);
-
-        if (loaderText) loaderText.textContent = 'Encrypting PDF with 256-bit AES...';
-
-        const args = [inputPath, '--encrypt', userPassword, ownerPassword, '256'];
-
-        // Only add restrictions if a distinct owner password was provided
-        if (hasDistinctOwnerPassword) {
-            args.push(
-                '--modify=none',
-                '--extract=n',
-                '--print=none',
-                '--accessibility=n',
-                '--annotate=n',
-                '--assemble=n',
-                '--form=n',
-                '--modify-other=n'
-            );
-        }
-
-        args.push('--', outputPath);
-
-        try {
-            qpdf.callMain(args);
-        } catch (qpdfError: any) {
-            console.error('qpdf execution error:', qpdfError);
-            throw new Error(
-                'Encryption failed: ' + (qpdfError.message || 'Unknown error')
-            );
-        }
-
-        if (loaderText) loaderText.textContent = 'Preparing download...';
-        const outputFile = qpdf.FS.readFile(outputPath, { encoding: 'binary' });
-
-        if (!outputFile || outputFile.length === 0) {
-            throw new Error('Encryption resulted in an empty file.');
-        }
-
-        const blob = new Blob([outputFile], { type: 'application/pdf' });
-        downloadFile(blob, `encrypted-${pageState.file.name}`);
-
-        if (loaderModal) loaderModal.classList.add('hidden');
-
-        let successMessage = 'PDF encrypted successfully with 256-bit AES!';
-        if (!hasDistinctOwnerPassword) {
-            successMessage +=
-                ' Note: Without a separate owner password, the PDF has no usage restrictions.';
-        }
-
-        showAlert('Success', successMessage, 'success', () => { resetState(); });
-    } catch (error: any) {
-        console.error('Error during PDF encryption:', error);
-        if (loaderModal) loaderModal.classList.add('hidden');
-        showAlert(
-            'Encryption Failed',
-            `An error occurred: ${error.message || 'The PDF might be corrupted.'}`
-        );
-    } finally {
-        try {
-            if (qpdf?.FS) {
-                try {
-                    qpdf.FS.unlink(inputPath);
-                } catch (e) {
-                    console.warn('Failed to unlink input file:', e);
-                }
-                try {
-                    qpdf.FS.unlink(outputPath);
-                } catch (e) {
-                    console.warn('Failed to unlink output file:', e);
-                }
-            }
-        } catch (cleanupError) {
-            console.warn('Failed to cleanup WASM FS:', cleanupError);
-        }
+      qpdf.callMain(args);
+    } catch (qpdfError: any) {
+      console.error('qpdf execution error:', qpdfError);
+      throw new Error(
+        'Encryption failed: ' + (qpdfError.message || 'Unknown error'),
+        { cause: qpdfError }
+      );
     }
+
+    if (loaderText) loaderText.textContent = 'Preparing download...';
+    const outputFile = qpdf.FS.readFile(outputPath, { encoding: 'binary' });
+
+    if (!outputFile || outputFile.length === 0) {
+      throw new Error('Encryption resulted in an empty file.');
+    }
+
+    const blob = new Blob([outputFile], { type: 'application/pdf' });
+    downloadFile(blob, `encrypted-${pageState.file.name}`);
+
+    if (loaderModal) loaderModal.classList.add('hidden');
+
+    let successMessage = 'PDF encrypted successfully with 256-bit AES!';
+    if (!hasDistinctOwnerPassword) {
+      successMessage +=
+        ' Note: Without a separate owner password, the PDF has no usage restrictions.';
+    }
+
+    showAlert('Success', successMessage, 'success', () => {
+      resetState();
+    });
+  } catch (error: any) {
+    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.'}`
+    );
+  } finally {
+    try {
+      if (qpdf?.FS) {
+        try {
+          qpdf.FS.unlink(inputPath);
+        } catch (e) {
+          console.warn('Failed to unlink input file:', e);
+        }
+        try {
+          qpdf.FS.unlink(outputPath);
+        } catch (e) {
+          console.warn('Failed to unlink output file:', e);
+        }
+      }
+    } catch (cleanupError) {
+      console.warn('Failed to cleanup WASM FS:', cleanupError);
+    }
+  }
 }
 
 document.addEventListener('DOMContentLoaded', function () {
-    const fileInput = document.getElementById('file-input') as HTMLInputElement;
-    const dropZone = document.getElementById('drop-zone');
-    const processBtn = document.getElementById('process-btn');
-    const backBtn = document.getElementById('back-to-tools');
+  const fileInput = document.getElementById('file-input') as HTMLInputElement;
+  const dropZone = document.getElementById('drop-zone');
+  const processBtn = document.getElementById('process-btn');
+  const backBtn = document.getElementById('back-to-tools');
 
-    if (backBtn) {
-        backBtn.addEventListener('click', function () {
-            window.location.href = import.meta.env.BASE_URL;
+  if (backBtn) {
+    backBtn.addEventListener('click', function () {
+      window.location.href = import.meta.env.BASE_URL;
+    });
+  }
+
+  if (fileInput && dropZone) {
+    fileInput.addEventListener('change', function (e) {
+      handleFileSelect((e.target as HTMLInputElement).files);
+    });
+
+    dropZone.addEventListener('dragover', function (e) {
+      e.preventDefault();
+      dropZone.classList.add('bg-gray-700');
+    });
+
+    dropZone.addEventListener('dragleave', function (e) {
+      e.preventDefault();
+      dropZone.classList.remove('bg-gray-700');
+    });
+
+    dropZone.addEventListener('drop', function (e) {
+      e.preventDefault();
+      dropZone.classList.remove('bg-gray-700');
+      const files = e.dataTransfer?.files;
+      if (files && files.length > 0) {
+        const pdfFiles = Array.from(files).filter(function (f) {
+          return (
+            f.type === 'application/pdf' ||
+            f.name.toLowerCase().endsWith('.pdf')
+          );
         });
-    }
+        if (pdfFiles.length > 0) {
+          const dataTransfer = new DataTransfer();
+          dataTransfer.items.add(pdfFiles[0]);
+          handleFileSelect(dataTransfer.files);
+        }
+      }
+    });
 
-    if (fileInput && dropZone) {
-        fileInput.addEventListener('change', function (e) {
-            handleFileSelect((e.target as HTMLInputElement).files);
-        });
+    fileInput.addEventListener('click', function () {
+      fileInput.value = '';
+    });
+  }
 
-        dropZone.addEventListener('dragover', function (e) {
-            e.preventDefault();
-            dropZone.classList.add('bg-gray-700');
-        });
-
-        dropZone.addEventListener('dragleave', function (e) {
-            e.preventDefault();
-            dropZone.classList.remove('bg-gray-700');
-        });
-
-        dropZone.addEventListener('drop', function (e) {
-            e.preventDefault();
-            dropZone.classList.remove('bg-gray-700');
-            const files = e.dataTransfer?.files;
-            if (files && files.length > 0) {
-                const pdfFiles = Array.from(files).filter(function (f) {
-                    return f.type === 'application/pdf' || f.name.toLowerCase().endsWith('.pdf');
-                });
-                if (pdfFiles.length > 0) {
-                    const dataTransfer = new DataTransfer();
-                    dataTransfer.items.add(pdfFiles[0]);
-                    handleFileSelect(dataTransfer.files);
-                }
-            }
-        });
-
-        fileInput.addEventListener('click', function () {
-            fileInput.value = '';
-        });
-    }
-
-    if (processBtn) {
-        processBtn.addEventListener('click', encryptPdf);
-    }
+  if (processBtn) {
+    processBtn.addEventListener('click', encryptPdf);
+  }
 });

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

@@ -8,6 +8,7 @@ import {
 import { PDFDocument } from 'pdf-lib';
 import { loadPdfWithPasswordPrompt } from '../utils/password-prompt.js';
 import JSZip from 'jszip';
+import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
 interface ExtractState {
   file: File | null;
@@ -99,8 +100,7 @@ async function handleFile(file: File) {
     showLoader('Loading PDF...');
     extractState.file = result.file;
     result.pdf.destroy();
-    extractState.pdfDoc = await PDFDocument.load(result.bytes, {
-      ignoreEncryption: true,
+    extractState.pdfDoc = await loadPdfDocument(result.bytes, {
       throwOnInvalidObject: false,
     });
     extractState.totalPages = extractState.pdfDoc.getPageCount();

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

@@ -7,6 +7,7 @@ import { icons, createIcons } from 'lucide';
 import JSZip from 'jszip';
 import { deduplicateFileName } from '../utils/deduplicate-filename.js';
 import { FlattenPdfState } from '@/types';
+import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
 const pageState: FlattenPdfState = {
   files: [],
@@ -115,7 +116,7 @@ async function flattenPdf() {
 
       const file = pageState.files[0];
       const arrayBuffer = await file.arrayBuffer();
-      const pdfDoc = await PDFDocument.load(arrayBuffer);
+      const pdfDoc = await loadPdfDocument(arrayBuffer);
 
       try {
         flattenFormsInDoc(pdfDoc);
@@ -154,7 +155,7 @@ async function flattenPdf() {
 
         try {
           const arrayBuffer = await file.arrayBuffer();
-          const pdfDoc = await PDFDocument.load(arrayBuffer);
+          const pdfDoc = await loadPdfDocument(arrayBuffer);
 
           try {
             flattenFormsInDoc(pdfDoc);

src/js/logic/form-creator.ts

@@ -49,6 +49,7 @@ import {
   PageData,
 } from '@/types';
 import { extractExistingFields as extractExistingPdfFields } from './form-creator-extraction.js';
+import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
 let fields: FormField[] = [];
 let selectedField: FormField | null = null;
@@ -3140,9 +3141,7 @@ async function handlePdfUpload(file: File) {
     if (!result) return;
     const arrayBuffer = result.bytes;
     uploadedPdfjsDoc = result.pdf;
-    uploadedPdfDoc = await PDFDocument.load(arrayBuffer, {
-      ignoreEncryption: true,
-    });
+    uploadedPdfDoc = await loadPdfDocument(arrayBuffer);
 
     // Check for existing fields and update counter
     existingFieldNames.clear();

src/js/logic/header-footer-page.ts

@@ -6,9 +6,10 @@ import {
   formatBytes,
   parsePageRanges,
 } from '../utils/helpers.js';
-import { PDFDocument as PDFLibDocument, rgb, StandardFonts } from 'pdf-lib';
+import { rgb, StandardFonts } from 'pdf-lib';
 import { loadPdfWithPasswordPrompt } from '../utils/password-prompt.js';
 import { HeaderFooterState } from '@/types';
+import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
 const pageState: HeaderFooterState = { file: null, pdfDoc: null };
 
@@ -68,9 +69,7 @@ async function handleFiles(files: FileList) {
     if (!result) return;
     showLoader('Loading PDF...');
 
-    pageState.pdfDoc = await PDFLibDocument.load(result.bytes, {
-      ignoreEncryption: true,
-    });
+    pageState.pdfDoc = await loadPdfDocument(result.bytes);
     pageState.file = result.file;
     result.pdf.destroy();
 
@@ -253,9 +252,12 @@ async function addHeaderFooter() {
         resetState();
       }
     );
-  } catch (e: any) {
+  } catch (e: unknown) {
     console.error(e);
-    showAlert('Error', e.message || 'Could not add header or footer.');
+    showAlert(
+      'Error',
+      e instanceof Error ? e.message : 'Could not add header or footer.'
+    );
   } finally {
     hideLoader();
   }

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

@@ -203,7 +203,9 @@ async function preprocessFile(file: File): Promise<File> {
       });
     } catch (e) {
       console.error(`Failed to convert HEIC: ${file.name}`, e);
-      throw new Error(`Failed to process HEIC file: ${file.name}`);
+      throw new Error(`Failed to process HEIC file: ${file.name}`, {
+        cause: e,
+      });
     }
   }
 
@@ -247,7 +249,9 @@ async function preprocessFile(file: File): Promise<File> {
       });
     } catch (e) {
       console.error(`Failed to convert WebP: ${file.name}`, e);
-      throw new Error(`Failed to process WebP file: ${file.name}`);
+      throw new Error(`Failed to process WebP file: ${file.name}`, {
+        cause: e,
+      });
     }
   }
 

src/js/logic/invert-colors-page.ts

@@ -6,6 +6,7 @@ import { applyInvertColors } from '../utils/image-effects.js';
 import * as pdfjsLib from 'pdfjs-dist';
 import { InvertColorsState } from '@/types';
 import { loadPdfWithPasswordPrompt } from '../utils/password-prompt.js';
+import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
 pdfjsLib.GlobalWorkerOptions.workerSrc = new URL(
   'pdfjs-dist/build/pdf.worker.min.mjs',
@@ -70,9 +71,7 @@ async function handleFiles(files: FileList) {
     if (!result) return;
     showLoader('Loading PDF...');
     result.pdf.destroy();
-    pageState.pdfDoc = await PDFLibDocument.load(result.bytes, {
-      ignoreEncryption: true,
-    });
+    pageState.pdfDoc = await loadPdfDocument(result.bytes);
     pageState.file = result.file;
     updateFileDisplay();
     document.getElementById('options-panel')?.classList.remove('hidden');

src/js/logic/n-up-pdf-page.ts

@@ -3,6 +3,7 @@ import { downloadFile, formatBytes, hexToRgb } from '../utils/helpers.js';
 import { createIcons, icons } from 'lucide';
 import { PDFDocument as PDFLibDocument, rgb, PageSizes } from 'pdf-lib';
 import { loadPdfWithPasswordPrompt } from '../utils/password-prompt.js';
+import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
 interface NUpState {
   file: File | null;
@@ -74,8 +75,7 @@ async function updateUI() {
       showLoader('Loading PDF...');
       result.pdf.destroy();
       pageState.file = result.file;
-      pageState.pdfDoc = await PDFLibDocument.load(result.bytes, {
-        ignoreEncryption: true,
+      pageState.pdfDoc = await loadPdfDocument(result.bytes, {
         throwOnInvalidObject: false,
       });
       hideLoader();

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

@@ -6,6 +6,7 @@ import { PDFDocument } from 'pdf-lib';
 import { loadPdfWithPasswordPrompt } from '../utils/password-prompt.js';
 import * as pdfjsLib from 'pdfjs-dist';
 import Sortable from 'sortablejs';
+import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
 pdfjsLib.GlobalWorkerOptions.workerSrc = new URL(
   'pdfjs-dist/build/pdf.worker.min.mjs',
@@ -176,8 +177,7 @@ async function handleFile(file: File) {
     if (!result) return;
     showLoader('Loading PDF...');
 
-    organizeState.pdfDoc = await PDFDocument.load(result.bytes, {
-      ignoreEncryption: true,
+    organizeState.pdfDoc = await loadPdfDocument(result.bytes, {
       throwOnInvalidObject: false,
     });
     organizeState.pdfJsDoc = result.pdf;

src/js/logic/page-dimensions-page.ts

@@ -5,16 +5,20 @@ import {
   convertPoints,
 } from '../utils/helpers.js';
 import { loadPdfWithPasswordPrompt } from '../utils/password-prompt.js';
-import { PDFDocument } from 'pdf-lib';
 import { icons, createIcons } from 'lucide';
-import { PageDimensionsState } from '@/types';
+import {
+  PageDimensionsState,
+  AnalyzedPageData,
+  UniqueSizeEntry,
+} from '@/types';
+import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
 const pageState: PageDimensionsState = {
   file: null,
   pdfDoc: null,
 };
 
-let analyzedPagesData: any[] = [];
+let analyzedPagesData: AnalyzedPageData[] = [];
 
 function calculateAspectRatio(width: number, height: number): string {
   const ratio = width / height;
@@ -35,11 +39,12 @@ function calculateArea(width: number, height: number, unit: string): string {
       convertedArea = (areaInPoints / (72 * 72)) * (25.4 * 25.4);
       unitSuffix = 'mm²';
       break;
-    case 'px':
+    case 'px': {
       const pxPerPoint = 96 / 72;
       convertedArea = areaInPoints * (pxPerPoint * pxPerPoint);
       unitSuffix = 'px²';
       break;
+    }
     default:
       convertedArea = areaInPoints;
       unitSuffix = 'pt²';
@@ -52,8 +57,8 @@ function calculateArea(width: number, height: number, unit: string): string {
 function getSummaryStats() {
   const totalPages = analyzedPagesData.length;
 
-  const uniqueSizes = new Map();
-  analyzedPagesData.forEach((pageData: any) => {
+  const uniqueSizes = new Map<string, UniqueSizeEntry>();
+  analyzedPagesData.forEach((pageData) => {
     const key = `${pageData.width.toFixed(2)}x${pageData.height.toFixed(2)}`;
     const label = `${pageData.standardSize} (${pageData.orientation})`;
     uniqueSizes.set(key, {
@@ -110,7 +115,7 @@ function renderSummary() {
             <ul class="space-y-1 text-sm text-gray-300">
               ${stats.uniqueSizes
                 .map(
-                  (size: any) => `
+                  (size: UniqueSizeEntry) => `
                 <li>• ${size.label}: ${size.count} page${size.count > 1 ? 's' : ''}</li>
               `
                 )
@@ -145,7 +150,7 @@ function renderTable(unit: string) {
 
     const pageNumCell = document.createElement('td');
     pageNumCell.className = 'px-4 py-3 text-white';
-    pageNumCell.textContent = pageData.pageNum;
+    pageNumCell.textContent = String(pageData.pageNum);
 
     const dimensionsCell = document.createElement('td');
     dimensionsCell.className = 'px-4 py-3 text-gray-300';
@@ -202,7 +207,7 @@ function exportToCSV() {
   ];
   const csvRows = [headers.join(',')];
 
-  analyzedPagesData.forEach((pageData: any) => {
+  analyzedPagesData.forEach((pageData) => {
     const width = convertPoints(pageData.width, unit);
     const height = convertPoints(pageData.height, unit);
     const aspectRatio = calculateAspectRatio(pageData.width, pageData.height);
@@ -239,7 +244,7 @@ function analyzeAndDisplayDimensions() {
   analyzedPagesData = [];
   const pages = pageState.pdfDoc.getPages();
 
-  pages.forEach((page: any, index: number) => {
+  pages.forEach((page, index) => {
     const { width, height } = page.getSize();
     const rotation = page.getRotation().angle || 0;
 
@@ -341,9 +346,7 @@ async function handleFileSelect(files: FileList | null) {
         result.pdf.destroy();
 
         pageState.file = result.file;
-        pageState.pdfDoc = await PDFDocument.load(result.bytes, {
-          ignoreEncryption: true,
-        });
+        pageState.pdfDoc = await loadPdfDocument(result.bytes);
         updateUI();
         analyzeAndDisplayDimensions();
       } catch (e) {

src/js/logic/page-numbers-page.ts

@@ -8,6 +8,7 @@ import {
   type PageNumberPosition,
   type PageNumberFormat,
 } from '../utils/pdf-operations.js';
+import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
 interface PageState {
   file: File | null;
@@ -89,9 +90,7 @@ async function handleFiles(files: FileList) {
     if (!result) return;
     showLoader('Loading PDF...');
 
-    pageState.pdfDoc = await PDFLibDocument.load(result.bytes, {
-      ignoreEncryption: true,
-    });
+    pageState.pdfDoc = await loadPdfDocument(result.bytes);
     pageState.file = result.file;
     result.pdf.destroy();
 

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

@@ -4,6 +4,7 @@ import { createIcons, icons } from 'lucide';
 import { PDFDocument as PDFLibDocument, degrees, PageSizes } from 'pdf-lib';
 import * as pdfjsLib from 'pdfjs-dist';
 import { loadPdfWithPasswordPrompt } from '../utils/password-prompt.js';
+import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
 pdfjsLib.GlobalWorkerOptions.workerSrc = new URL(
   'pdfjs-dist/build/pdf.worker.mjs',
@@ -98,7 +99,7 @@ async function updateUI() {
       pageState.pdfBytes = new Uint8Array(result.bytes);
       pageState.pdfjsDoc = result.pdf;
 
-      pageState.pdfDoc = await PDFLibDocument.load(pageState.pdfBytes, {
+      pageState.pdfDoc = await loadPdfDocument(pageState.pdfBytes, {
         throwOnInvalidObject: false,
       });
 
@@ -430,7 +431,7 @@ async function createBooklet() {
   showLoader('Creating Booklet...');
 
   try {
-    const sourceDoc = await PDFLibDocument.load(pageState.pdfBytes.slice());
+    const sourceDoc = await loadPdfDocument(pageState.pdfBytes.slice());
     const rotationMode =
       (
         document.querySelector(

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

@@ -20,6 +20,7 @@ pdfjsLib.GlobalWorkerOptions.workerSrc = new URL(
 ).toString();
 
 import { t } from '../i18n/i18n';
+import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
 interface PageData {
   id: string; // Unique ID for DOM reconciliation
@@ -435,8 +436,7 @@ async function loadPdfs(files: File[]) {
         pwResult.pdf.destroy();
         arrayBuffer = pwResult.bytes as ArrayBuffer;
 
-        const pdfDoc = await PDFLibDocument.load(arrayBuffer, {
-          ignoreEncryption: true,
+        const pdfDoc = await loadPdfDocument(arrayBuffer, {
           throwOnInvalidObject: false,
         });
         currentPdfDocs.push(pdfDoc);
@@ -859,8 +859,7 @@ async function handleInsertPdf(e: Event) {
     if (!pwResult) return;
     pwResult.pdf.destroy();
 
-    const pdfDoc = await PDFLibDocument.load(pwResult.bytes, {
-      ignoreEncryption: true,
+    const pdfDoc = await loadPdfDocument(pwResult.bytes, {
       throwOnInvalidObject: false,
     });
     currentPdfDocs.push(pdfDoc);

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

@@ -1,6 +1,7 @@
 import { PDFDocument, PDFName } from 'pdf-lib';
 import { createIcons, icons } from 'lucide';
 import { loadPdfWithPasswordPrompt } from '../utils/password-prompt.js';
+import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
 // State management
 const pageState: { pdfDoc: PDFDocument | null; file: File | null } = {
@@ -108,9 +109,7 @@ async function handleFileUpload(file: File) {
     if (!result) return;
     showLoader('Loading PDF...');
     result.pdf.destroy();
-    pageState.pdfDoc = await PDFDocument.load(result.bytes, {
-      ignoreEncryption: true,
-    });
+    pageState.pdfDoc = await loadPdfDocument(result.bytes);
     pageState.file = result.file;
     updateFileDisplay();
     document.getElementById('options-panel')?.classList.remove('hidden');

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

@@ -3,6 +3,7 @@ import * as pdfjsLib from 'pdfjs-dist';
 import { createIcons, icons } from 'lucide';
 import { initPagePreview } from '../utils/page-preview.js';
 import { loadPdfWithPasswordPrompt } from '../utils/password-prompt.js';
+import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
 pdfjsLib.GlobalWorkerOptions.workerSrc = new URL(
   'pdfjs-dist/build/pdf.worker.min.mjs',
@@ -122,9 +123,7 @@ async function handleFileUpload(file: File) {
     if (!result) return;
     showLoader('Loading PDF...');
     result.pdf.destroy();
-    pageState.pdfDoc = await PDFDocument.load(result.bytes, {
-      ignoreEncryption: true,
-    });
+    pageState.pdfDoc = await loadPdfDocument(result.bytes);
     pageState.file = result.file;
     pageState.detectedBlankPages = [];
     updateFileDisplay();

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

@@ -3,6 +3,7 @@ import { downloadFile, formatBytes } from '../utils/helpers.js';
 import { PDFDocument, PDFName } from 'pdf-lib';
 import { icons, createIcons } from 'lucide';
 import { loadPdfWithPasswordPrompt } from '../utils/password-prompt.js';
+import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
 interface PageState {
   file: File | null;
@@ -150,9 +151,7 @@ async function removeMetadata() {
     if (loaderModal) loaderModal.classList.remove('hidden');
     if (loaderText) loaderText.textContent = 'Removing all metadata...';
     result.pdf.destroy();
-    const pdfDoc = await PDFDocument.load(result.bytes, {
-      ignoreEncryption: true,
-    });
+    const pdfDoc = await loadPdfDocument(result.bytes);
 
     removeMetadataFromDoc(pdfDoc);
 

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

@@ -1,230 +1,250 @@
 import { showAlert } from '../ui.js';
-import { downloadFile, formatBytes, initializeQpdf, readFileAsArrayBuffer } from '../utils/helpers.js';
+import {
+  downloadFile,
+  formatBytes,
+  initializeQpdf,
+  readFileAsArrayBuffer,
+} from '../utils/helpers.js';
 import { icons, createIcons } from 'lucide';
 import { RemoveRestrictionsState } from '@/types';
 
 const pageState: RemoveRestrictionsState = {
-    file: null,
+  file: null,
 };
 
 function resetState() {
-    pageState.file = null;
+  pageState.file = null;
 
-    const fileDisplayArea = document.getElementById('file-display-area');
-    if (fileDisplayArea) fileDisplayArea.innerHTML = '';
+  const fileDisplayArea = document.getElementById('file-display-area');
+  if (fileDisplayArea) fileDisplayArea.innerHTML = '';
 
-    const toolOptions = document.getElementById('tool-options');
-    if (toolOptions) toolOptions.classList.add('hidden');
+  const toolOptions = document.getElementById('tool-options');
+  if (toolOptions) toolOptions.classList.add('hidden');
 
-    const fileInput = document.getElementById('file-input') as HTMLInputElement;
-    if (fileInput) fileInput.value = '';
+  const fileInput = document.getElementById('file-input') as HTMLInputElement;
+  if (fileInput) fileInput.value = '';
 
-    const passwordInput = document.getElementById('owner-password-remove') as HTMLInputElement;
-    if (passwordInput) passwordInput.value = '';
+  const passwordInput = document.getElementById(
+    'owner-password-remove'
+  ) as HTMLInputElement;
+  if (passwordInput) passwordInput.value = '';
 }
 
 async function updateUI() {
-    const fileDisplayArea = document.getElementById('file-display-area');
-    const toolOptions = document.getElementById('tool-options');
+  const fileDisplayArea = document.getElementById('file-display-area');
+  const toolOptions = document.getElementById('tool-options');
 
-    if (!fileDisplayArea) return;
+  if (!fileDisplayArea) return;
 
-    fileDisplayArea.innerHTML = '';
+  fileDisplayArea.innerHTML = '';
 
-    if (pageState.file) {
-        const fileDiv = document.createElement('div');
-        fileDiv.className = 'flex items-center justify-between bg-gray-700 p-3 rounded-lg text-sm';
+  if (pageState.file) {
+    const fileDiv = document.createElement('div');
+    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 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.textContent = pageState.file.name;
+    const nameSpan = document.createElement('div');
+    nameSpan.className = 'truncate font-medium text-gray-200 text-sm mb-1';
+    nameSpan.textContent = pageState.file.name;
 
-        const metaSpan = document.createElement('div');
-        metaSpan.className = 'text-xs text-gray-400';
-        metaSpan.textContent = formatBytes(pageState.file.size);
+    const metaSpan = document.createElement('div');
+    metaSpan.className = 'text-xs text-gray-400';
+    metaSpan.textContent = formatBytes(pageState.file.size);
 
-        infoContainer.append(nameSpan, metaSpan);
+    infoContainer.append(nameSpan, metaSpan);
 
-        const removeBtn = document.createElement('button');
-        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 = function () {
-            resetState();
-        };
+    const removeBtn = document.createElement('button');
+    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 = function () {
+      resetState();
+    };
 
-        fileDiv.append(infoContainer, removeBtn);
-        fileDisplayArea.appendChild(fileDiv);
-        createIcons({ icons });
+    fileDiv.append(infoContainer, removeBtn);
+    fileDisplayArea.appendChild(fileDiv);
+    createIcons({ icons });
 
-        if (toolOptions) toolOptions.classList.remove('hidden');
-    } else {
-        if (toolOptions) toolOptions.classList.add('hidden');
-    }
+    if (toolOptions) toolOptions.classList.remove('hidden');
+  } else {
+    if (toolOptions) toolOptions.classList.add('hidden');
+  }
 }
 
 function handleFileSelect(files: FileList | null) {
-    if (files && files.length > 0) {
-        const file = files[0];
-        if (file.type === 'application/pdf' || file.name.toLowerCase().endsWith('.pdf')) {
-            pageState.file = file;
-            updateUI();
-        }
+  if (files && files.length > 0) {
+    const file = files[0];
+    if (
+      file.type === 'application/pdf' ||
+      file.name.toLowerCase().endsWith('.pdf')
+    ) {
+      pageState.file = file;
+      updateUI();
     }
+  }
 }
 
 async function removeRestrictions() {
-    if (!pageState.file) {
-        showAlert('No File', 'Please upload a PDF file first.');
-        return;
+  if (!pageState.file) {
+    showAlert('No File', 'Please upload a PDF file first.');
+    return;
+  }
+
+  const password =
+    (document.getElementById('owner-password-remove') as HTMLInputElement)
+      ?.value || '';
+
+  const inputPath = '/input.pdf';
+  const outputPath = '/output.pdf';
+  let qpdf: any;
+
+  const loaderModal = document.getElementById('loader-modal');
+  const loaderText = document.getElementById('loader-text');
+
+  try {
+    if (loaderModal) loaderModal.classList.remove('hidden');
+    if (loaderText) loaderText.textContent = 'Initializing...';
+
+    qpdf = await initializeQpdf();
+
+    if (loaderText) loaderText.textContent = 'Reading PDF...';
+    const fileBuffer = await readFileAsArrayBuffer(pageState.file);
+    const uint8Array = new Uint8Array(fileBuffer as ArrayBuffer);
+
+    qpdf.FS.writeFile(inputPath, uint8Array);
+
+    if (loaderText) loaderText.textContent = 'Removing restrictions...';
+
+    const args = [inputPath];
+
+    if (password) {
+      args.push(`--password=${password}`);
     }
 
-    const password = (document.getElementById('owner-password-remove') as HTMLInputElement)?.value || '';
-
-    const inputPath = '/input.pdf';
-    const outputPath = '/output.pdf';
-    let qpdf: any;
-
-    const loaderModal = document.getElementById('loader-modal');
-    const loaderText = document.getElementById('loader-text');
+    args.push('--decrypt', '--remove-restrictions', '--', outputPath);
 
     try {
-        if (loaderModal) loaderModal.classList.remove('hidden');
-        if (loaderText) loaderText.textContent = 'Initializing...';
-
-        qpdf = await initializeQpdf();
-
-        if (loaderText) loaderText.textContent = 'Reading PDF...';
-        const fileBuffer = await readFileAsArrayBuffer(pageState.file);
-        const uint8Array = new Uint8Array(fileBuffer as ArrayBuffer);
-
-        qpdf.FS.writeFile(inputPath, uint8Array);
-
-        if (loaderText) loaderText.textContent = 'Removing restrictions...';
-
-        const args = [inputPath];
-
-        if (password) {
-            args.push(`--password=${password}`);
-        }
-
-        args.push('--decrypt', '--remove-restrictions', '--', outputPath);
-
-        try {
-            qpdf.callMain(args);
-        } catch (qpdfError: any) {
-            console.error('qpdf execution error:', qpdfError);
-            if (
-                qpdfError.message?.includes('password') ||
-                qpdfError.message?.includes('encrypt')
-            ) {
-                throw new Error(
-                    'Failed to remove restrictions. The PDF may require the correct owner password.'
-                );
-            }
-
-            throw new Error(
-                'Failed to remove restrictions: ' +
-                (qpdfError.message || 'Unknown error')
-            );
-        }
-
-        if (loaderText) loaderText.textContent = 'Preparing download...';
-        const outputFile = qpdf.FS.readFile(outputPath, { encoding: 'binary' });
-
-        if (!outputFile || outputFile.length === 0) {
-            throw new Error('Operation resulted in an empty file.');
-        }
-
-        const blob = new Blob([outputFile], { type: 'application/pdf' });
-        downloadFile(blob, `unrestricted-${pageState.file.name}`);
-
-        if (loaderModal) loaderModal.classList.add('hidden');
-
-        showAlert(
-            'Success',
-            'PDF restrictions removed successfully! The file is now fully editable and printable.',
-            'success',
-            () => { resetState(); }
+      qpdf.callMain(args);
+    } catch (qpdfError: any) {
+      console.error('qpdf execution error:', qpdfError);
+      if (
+        qpdfError.message?.includes('password') ||
+        qpdfError.message?.includes('encrypt')
+      ) {
+        throw new Error(
+          'Failed to remove restrictions. The PDF may require the correct owner password.',
+          { cause: qpdfError }
         );
-    } catch (error: any) {
-        console.error('Error during restriction removal:', error);
-        if (loaderModal) loaderModal.classList.add('hidden');
-        showAlert(
-            'Operation Failed',
-            `An error occurred: ${error.message || 'The PDF might be corrupted or password-protected.'}`
-        );
-    } finally {
-        try {
-            if (qpdf?.FS) {
-                try {
-                    qpdf.FS.unlink(inputPath);
-                } catch (e) {
-                    console.warn('Failed to unlink input file:', e);
-                }
-                try {
-                    qpdf.FS.unlink(outputPath);
-                } catch (e) {
-                    console.warn('Failed to unlink output file:', e);
-                }
-            }
-        } catch (cleanupError) {
-            console.warn('Failed to cleanup WASM FS:', cleanupError);
-        }
+      }
+
+      throw new Error(
+        'Failed to remove restrictions: ' +
+          (qpdfError.message || 'Unknown error'),
+        { cause: qpdfError }
+      );
     }
+
+    if (loaderText) loaderText.textContent = 'Preparing download...';
+    const outputFile = qpdf.FS.readFile(outputPath, { encoding: 'binary' });
+
+    if (!outputFile || outputFile.length === 0) {
+      throw new Error('Operation resulted in an empty file.');
+    }
+
+    const blob = new Blob([outputFile], { type: 'application/pdf' });
+    downloadFile(blob, `unrestricted-${pageState.file.name}`);
+
+    if (loaderModal) loaderModal.classList.add('hidden');
+
+    showAlert(
+      'Success',
+      'PDF restrictions removed successfully! The file is now fully editable and printable.',
+      'success',
+      () => {
+        resetState();
+      }
+    );
+  } catch (error: any) {
+    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.'}`
+    );
+  } finally {
+    try {
+      if (qpdf?.FS) {
+        try {
+          qpdf.FS.unlink(inputPath);
+        } catch (e) {
+          console.warn('Failed to unlink input file:', e);
+        }
+        try {
+          qpdf.FS.unlink(outputPath);
+        } catch (e) {
+          console.warn('Failed to unlink output file:', e);
+        }
+      }
+    } catch (cleanupError) {
+      console.warn('Failed to cleanup WASM FS:', cleanupError);
+    }
+  }
 }
 
 document.addEventListener('DOMContentLoaded', function () {
-    const fileInput = document.getElementById('file-input') as HTMLInputElement;
-    const dropZone = document.getElementById('drop-zone');
-    const processBtn = document.getElementById('process-btn');
-    const backBtn = document.getElementById('back-to-tools');
+  const fileInput = document.getElementById('file-input') as HTMLInputElement;
+  const dropZone = document.getElementById('drop-zone');
+  const processBtn = document.getElementById('process-btn');
+  const backBtn = document.getElementById('back-to-tools');
 
-    if (backBtn) {
-        backBtn.addEventListener('click', function () {
-            window.location.href = import.meta.env.BASE_URL;
+  if (backBtn) {
+    backBtn.addEventListener('click', function () {
+      window.location.href = import.meta.env.BASE_URL;
+    });
+  }
+
+  if (fileInput && dropZone) {
+    fileInput.addEventListener('change', function (e) {
+      handleFileSelect((e.target as HTMLInputElement).files);
+    });
+
+    dropZone.addEventListener('dragover', function (e) {
+      e.preventDefault();
+      dropZone.classList.add('bg-gray-700');
+    });
+
+    dropZone.addEventListener('dragleave', function (e) {
+      e.preventDefault();
+      dropZone.classList.remove('bg-gray-700');
+    });
+
+    dropZone.addEventListener('drop', function (e) {
+      e.preventDefault();
+      dropZone.classList.remove('bg-gray-700');
+      const files = e.dataTransfer?.files;
+      if (files && files.length > 0) {
+        const pdfFiles = Array.from(files).filter(function (f) {
+          return (
+            f.type === 'application/pdf' ||
+            f.name.toLowerCase().endsWith('.pdf')
+          );
         });
-    }
+        if (pdfFiles.length > 0) {
+          const dataTransfer = new DataTransfer();
+          dataTransfer.items.add(pdfFiles[0]);
+          handleFileSelect(dataTransfer.files);
+        }
+      }
+    });
 
-    if (fileInput && dropZone) {
-        fileInput.addEventListener('change', function (e) {
-            handleFileSelect((e.target as HTMLInputElement).files);
-        });
+    fileInput.addEventListener('click', function () {
+      fileInput.value = '';
+    });
+  }
 
-        dropZone.addEventListener('dragover', function (e) {
-            e.preventDefault();
-            dropZone.classList.add('bg-gray-700');
-        });
-
-        dropZone.addEventListener('dragleave', function (e) {
-            e.preventDefault();
-            dropZone.classList.remove('bg-gray-700');
-        });
-
-        dropZone.addEventListener('drop', function (e) {
-            e.preventDefault();
-            dropZone.classList.remove('bg-gray-700');
-            const files = e.dataTransfer?.files;
-            if (files && files.length > 0) {
-                const pdfFiles = Array.from(files).filter(function (f) {
-                    return f.type === 'application/pdf' || f.name.toLowerCase().endsWith('.pdf');
-                });
-                if (pdfFiles.length > 0) {
-                    const dataTransfer = new DataTransfer();
-                    dataTransfer.items.add(pdfFiles[0]);
-                    handleFileSelect(dataTransfer.files);
-                }
-            }
-        });
-
-        fileInput.addEventListener('click', function () {
-            fileInput.value = '';
-        });
-    }
-
-    if (processBtn) {
-        processBtn.addEventListener('click', removeRestrictions);
-    }
+  if (processBtn) {
+    processBtn.addEventListener('click', removeRestrictions);
+  }
 });

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

@@ -5,6 +5,7 @@ import { PDFDocument as PDFLibDocument } from 'pdf-lib';
 import JSZip from 'jszip';
 import { deduplicateFileName } from '../utils/deduplicate-filename.js';
 import { batchDecryptIfNeeded } from '../utils/password-prompt.js';
+import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
 interface ReverseState {
   files: File[];
@@ -79,7 +80,7 @@ function updateUI() {
 
 async function reverseSingleFile(file: File): Promise<Uint8Array> {
   const arrayBuffer = await file.arrayBuffer();
-  const pdfDoc = await PDFLibDocument.load(arrayBuffer);
+  const pdfDoc = await loadPdfDocument(arrayBuffer);
 
   const newPdf = await PDFLibDocument.create();
   const pageCount = pdfDoc.getPageCount();

src/js/logic/rotate-custom-page.ts

@@ -8,6 +8,7 @@ import {
 } from '../utils/render-utils.js';
 import { loadPdfWithPasswordPrompt } from '../utils/password-prompt.js';
 import * as pdfjsLib from 'pdfjs-dist';
+import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
 pdfjsLib.GlobalWorkerOptions.workerSrc = new URL(
   'pdfjs-dist/build/pdf.worker.min.mjs',
@@ -235,8 +236,7 @@ async function updateUI() {
       }
       showLoader('Loading PDF...');
 
-      pageState.pdfDoc = await PDFLibDocument.load(result.bytes, {
-        ignoreEncryption: true,
+      pageState.pdfDoc = await loadPdfDocument(result.bytes, {
         throwOnInvalidObject: false,
       });
 

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

@@ -9,6 +9,7 @@ import {
 import { rotatePdfPages } from '../utils/pdf-operations.js';
 import { loadPdfWithPasswordPrompt } from '../utils/password-prompt.js';
 import * as pdfjsLib from 'pdfjs-dist';
+import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
 pdfjsLib.GlobalWorkerOptions.workerSrc = new URL(
   'pdfjs-dist/build/pdf.worker.min.mjs',
@@ -207,8 +208,7 @@ async function updateUI() {
       }
       showLoader('Loading PDF...');
 
-      pageState.pdfDoc = await PDFLibDocument.load(result.bytes, {
-        ignoreEncryption: true,
+      pageState.pdfDoc = await loadPdfDocument(result.bytes, {
         throwOnInvalidObject: false,
       });
 

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

@@ -6,16 +6,9 @@ import {
   downloadFile,
 } from '../utils/helpers.js';
 import { loadPdfWithPasswordPrompt } from '../utils/password-prompt.js';
-import { PDFDocument } from 'pdf-lib';
 import { t } from '../i18n/i18n';
-
-interface SignState {
-  file: File | null;
-  pdfDoc: any;
-  viewerIframe: HTMLIFrameElement | null;
-  viewerReady: boolean;
-  blobUrl: string | null;
-}
+import { loadPdfDocument } from '../utils/load-pdf-document.js';
+import type { SignState, PDFViewerWindow } from '@/types';
 
 const signState: SignState = {
   file: null,
@@ -124,7 +117,7 @@ async function updateFileDisplay() {
 
   const removeBtn = document.createElement('button');
   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.innerHTML = '<i data-lucide="trash-2" class="w-4 h-4"></i>';
   removeBtn.onclick = () => {
     signState.file = null;
     signState.pdfDoc = null;
@@ -180,20 +173,26 @@ async function setupSignTool() {
   signState.viewerIframe = iframe;
 
   const pdfBytes = await readFileAsArrayBuffer(signState.file);
-  const blob = new Blob([pdfBytes as BlobPart], { type: 'application/pdf' });
+  const blob = new Blob([new Uint8Array(pdfBytes as ArrayBuffer)], {
+    type: 'application/pdf',
+  });
   signState.blobUrl = URL.createObjectURL(blob);
 
   try {
     const existingPrefsRaw = localStorage.getItem('pdfjs.preferences');
-    const existingPrefs = existingPrefsRaw ? JSON.parse(existingPrefsRaw) : {};
-    delete (existingPrefs as any).annotationEditorMode;
+    const existingPrefs: Record<string, unknown> = existingPrefsRaw
+      ? JSON.parse(existingPrefsRaw)
+      : {};
+    delete existingPrefs.annotationEditorMode;
     const newPrefs = {
       ...existingPrefs,
       enableSignatureEditor: true,
       enablePermissions: false,
     };
     localStorage.setItem('pdfjs.preferences', JSON.stringify(newPrefs));
-  } catch {}
+  } catch (e) {
+    console.warn('Failed to update pdfjs.preferences in localStorage', e);
+  }
 
   const viewerUrl = new URL(
     `${import.meta.env.BASE_URL}pdfjs-viewer/viewer.html`,
@@ -206,7 +205,7 @@ async function setupSignTool() {
     hideLoader();
     signState.viewerReady = true;
     try {
-      const viewerWindow: any = iframe.contentWindow;
+      const viewerWindow = iframe.contentWindow as PDFViewerWindow | null;
       if (viewerWindow && viewerWindow.PDFViewerApplication) {
         const app = viewerWindow.PDFViewerApplication;
         const doc = viewerWindow.document;
@@ -235,7 +234,12 @@ async function setupSignTool() {
               'editorHighlightButton'
             ) as HTMLButtonElement | null;
             highlightBtn?.click();
-          } catch {}
+          } catch (e) {
+            console.warn(
+              'Failed to auto-click highlight button in PDF viewer',
+              e
+            );
+          }
         });
       }
     } catch (e) {
@@ -258,7 +262,8 @@ async function applyAndSaveSignatures() {
   }
 
   try {
-    const viewerWindow: any = signState.viewerIframe.contentWindow;
+    const viewerWindow = signState.viewerIframe
+      .contentWindow as PDFViewerWindow | null;
     if (!viewerWindow || !viewerWindow.PDFViewerApplication) {
       showAlert('Viewer not ready', 'The PDF viewer is still initializing.');
       return;
@@ -277,11 +282,11 @@ async function applyAndSaveSignatures() {
         app.pdfDocument.annotationStorage
       );
       const pdfBytes = new Uint8Array(rawPdfBytes);
-      const pdfDoc = await PDFDocument.load(pdfBytes);
+      const pdfDoc = await loadPdfDocument(pdfBytes);
       pdfDoc.getForm().flatten();
       const flattenedPdfBytes = await pdfDoc.save();
 
-      const blob = new Blob([flattenedPdfBytes as BlobPart], {
+      const blob = new Blob([new Uint8Array(flattenedPdfBytes)], {
         type: 'application/pdf',
       });
       downloadFile(

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

@@ -14,6 +14,7 @@ import { isCpdfAvailable } from '../utils/cpdf-helper.js';
 import { showWasmRequiredDialog } from '../utils/wasm-provider.js';
 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(
@@ -98,9 +99,7 @@ document.addEventListener('DOMContentLoaded', () => {
             }
             result.pdf.destroy();
             state.files[0] = result.file;
-            state.pdfDoc = await PDFLibDocument.load(result.bytes, {
-              ignoreEncryption: true,
-            });
+            state.pdfDoc = await loadPdfDocument(result.bytes);
           }
           // Update page count
           metaSpan.textContent = `${formatBytes(file.size)} • ${state.pdfDoc.getPageCount()} pages`;
@@ -148,9 +147,7 @@ document.addEventListener('DOMContentLoaded', () => {
           }
           result.pdf.destroy();
           state.files[0] = result.file;
-          state.pdfDoc = await PDFLibDocument.load(result.bytes, {
-            ignoreEncryption: true,
-          });
+          state.pdfDoc = await loadPdfDocument(result.bytes);
           showLoader('Rendering page previews...');
         } else {
           throw new Error('No PDF document loaded');

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

@@ -247,7 +247,8 @@ async function convertToPdf() {
       } catch (error) {
         console.error(`Failed to process ${file.name}:`, error);
         throw new Error(
-          `Could not process "${file.name}". The file may be corrupted.`
+          `Could not process "${file.name}". The file may be corrupted.`,
+          { cause: error }
         );
       }
     }

src/js/logic/text-color-page.ts

@@ -11,6 +11,7 @@ import { PDFDocument as PDFLibDocument } from 'pdf-lib';
 import * as pdfjsLib from 'pdfjs-dist';
 import { TextColorState } from '@/types';
 import { loadPdfWithPasswordPrompt } from '../utils/password-prompt.js';
+import { loadPdfDocument } from '../utils/load-pdf-document.js';
 
 pdfjsLib.GlobalWorkerOptions.workerSrc = new URL(
   'pdfjs-dist/build/pdf.worker.min.mjs',
@@ -75,9 +76,7 @@ async function handleFiles(files: FileList) {
     if (!result) return;
     showLoader('Loading PDF...');
     result.pdf.destroy();
-    pageState.pdfDoc = await PDFLibDocument.load(result.bytes, {
-      ignoreEncryption: true,
-    });
+    pageState.pdfDoc = await loadPdfDocument(result.bytes);
     pageState.file = result.file;
     updateFileDisplay();
     document.getElementById('options-panel')?.classList.remove('hidden');

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

@@ -1,238 +1,260 @@
 import forge from 'node-forge';
 import { ExtractedSignature, SignatureValidationResult } from '@/types';
 
-
 export function extractSignatures(pdfBytes: Uint8Array): ExtractedSignature[] {
-    const signatures: ExtractedSignature[] = [];
-    const pdfString = new TextDecoder('latin1').decode(pdfBytes);
+  const signatures: ExtractedSignature[] = [];
+  const pdfString = new TextDecoder('latin1').decode(pdfBytes);
 
-    // Find all signature objects for /Type /Sig
-    const sigRegex = /\/Type\s*\/Sig\b/g;
-    let sigMatch;
-    let sigIndex = 0;
+  // Find all signature objects for /Type /Sig
+  const sigRegex = /\/Type\s*\/Sig\b/g;
+  let sigMatch;
+  let sigIndex = 0;
 
-    while ((sigMatch = sigRegex.exec(pdfString)) !== null) {
-        try {
-            const searchStart = Math.max(0, sigMatch.index - 5000);
-            const searchEnd = Math.min(pdfString.length, sigMatch.index + 10000);
-            const context = pdfString.substring(searchStart, searchEnd);
-            const byteRangeMatch = context.match(/\/ByteRange\s*\[\s*(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s*\]/);
-            if (!byteRangeMatch) continue;
+  while ((sigMatch = sigRegex.exec(pdfString)) !== null) {
+    try {
+      const searchStart = Math.max(0, sigMatch.index - 5000);
+      const searchEnd = Math.min(pdfString.length, sigMatch.index + 10000);
+      const context = pdfString.substring(searchStart, searchEnd);
+      const byteRangeMatch = context.match(
+        /\/ByteRange\s*\[\s*(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s*\]/
+      );
+      if (!byteRangeMatch) continue;
 
-            const byteRange = [
-                parseInt(byteRangeMatch[1], 10),
-                parseInt(byteRangeMatch[2], 10),
-                parseInt(byteRangeMatch[3], 10),
-                parseInt(byteRangeMatch[4], 10),
-            ];
+      const byteRange = [
+        parseInt(byteRangeMatch[1], 10),
+        parseInt(byteRangeMatch[2], 10),
+        parseInt(byteRangeMatch[3], 10),
+        parseInt(byteRangeMatch[4], 10),
+      ];
 
-            const contentsMatch = context.match(/\/Contents\s*<([0-9A-Fa-f]+)>/);
-            if (!contentsMatch) continue;
+      const contentsMatch = context.match(/\/Contents\s*<([0-9A-Fa-f]+)>/);
+      if (!contentsMatch) continue;
 
-            const hexContents = contentsMatch[1];
-            const contentsBytes = hexToBytes(hexContents);
+      const hexContents = contentsMatch[1];
+      const contentsBytes = hexToBytes(hexContents);
 
-            const reasonMatch = context.match(/\/Reason\s*\(([^)]*)\)/);
-            const locationMatch = context.match(/\/Location\s*\(([^)]*)\)/);
-            const contactMatch = context.match(/\/ContactInfo\s*\(([^)]*)\)/);
-            const nameMatch = context.match(/\/Name\s*\(([^)]*)\)/);
-            const timeMatch = context.match(/\/M\s*\(D:(\d{4})(\d{2})(\d{2})(\d{2})(\d{2})(\d{2})/);
+      const reasonMatch = context.match(/\/Reason\s*\(([^)]*)\)/);
+      const locationMatch = context.match(/\/Location\s*\(([^)]*)\)/);
+      const contactMatch = context.match(/\/ContactInfo\s*\(([^)]*)\)/);
+      const nameMatch = context.match(/\/Name\s*\(([^)]*)\)/);
+      const timeMatch = context.match(
+        /\/M\s*\(D:(\d{4})(\d{2})(\d{2})(\d{2})(\d{2})(\d{2})/
+      );
 
-            let signingTime: string | undefined;
-            if (timeMatch) {
-                signingTime = `${timeMatch[1]}-${timeMatch[2]}-${timeMatch[3]}T${timeMatch[4]}:${timeMatch[5]}:${timeMatch[6]}`;
-            }
+      let signingTime: string | undefined;
+      if (timeMatch) {
+        signingTime = `${timeMatch[1]}-${timeMatch[2]}-${timeMatch[3]}T${timeMatch[4]}:${timeMatch[5]}:${timeMatch[6]}`;
+      }
 
-            signatures.push({
-                index: sigIndex++,
-                contents: contentsBytes,
-                byteRange,
-                reason: reasonMatch ? decodeURIComponent(escape(reasonMatch[1])) : undefined,
-                location: locationMatch ? decodeURIComponent(escape(locationMatch[1])) : undefined,
-                contactInfo: contactMatch ? decodeURIComponent(escape(contactMatch[1])) : undefined,
-                name: nameMatch ? decodeURIComponent(escape(nameMatch[1])) : undefined,
-                signingTime,
-            });
-        } catch (e) {
-            console.warn('Error extracting signature at index', sigIndex, e);
-        }
+      signatures.push({
+        index: sigIndex++,
+        contents: contentsBytes,
+        byteRange,
+        reason: reasonMatch
+          ? decodeURIComponent(escape(reasonMatch[1]))
+          : undefined,
+        location: locationMatch
+          ? decodeURIComponent(escape(locationMatch[1]))
+          : undefined,
+        contactInfo: contactMatch
+          ? decodeURIComponent(escape(contactMatch[1]))
+          : undefined,
+        name: nameMatch ? decodeURIComponent(escape(nameMatch[1])) : undefined,
+        signingTime,
+      });
+    } catch (e) {
+      console.warn('Error extracting signature at index', sigIndex, e);
     }
+  }
 
-    return signatures;
+  return signatures;
 }
 
 export function validateSignature(
-    signature: ExtractedSignature,
-    pdfBytes: Uint8Array,
-    trustedCert?: forge.pki.Certificate
+  signature: ExtractedSignature,
+  pdfBytes: Uint8Array,
+  trustedCert?: forge.pki.Certificate
 ): SignatureValidationResult {
-    const result: SignatureValidationResult = {
-        signatureIndex: signature.index,
-        isValid: false,
-        signerName: 'Unknown',
-        issuer: 'Unknown',
-        validFrom: new Date(0),
-        validTo: new Date(0),
-        isExpired: false,
-        isSelfSigned: false,
-        isTrusted: false,
-        algorithms: { digest: 'Unknown', signature: 'Unknown' },
-        serialNumber: '',
-        byteRange: signature.byteRange,
-        coverageStatus: 'unknown',
-        reason: signature.reason,
-        location: signature.location,
-        contactInfo: signature.contactInfo,
-    };
+  const result: SignatureValidationResult = {
+    signatureIndex: signature.index,
+    isValid: false,
+    signerName: 'Unknown',
+    issuer: 'Unknown',
+    validFrom: new Date(0),
+    validTo: new Date(0),
+    isExpired: false,
+    isSelfSigned: false,
+    isTrusted: false,
+    algorithms: { digest: 'Unknown', signature: 'Unknown' },
+    serialNumber: '',
+    byteRange: signature.byteRange,
+    coverageStatus: 'unknown',
+    reason: signature.reason,
+    location: signature.location,
+    contactInfo: signature.contactInfo,
+  };
 
-    try {
-        const binaryString = String.fromCharCode.apply(null, Array.from(signature.contents));
-        const asn1 = forge.asn1.fromDer(binaryString);
-        const p7 = forge.pkcs7.messageFromAsn1(asn1) as any;
+  try {
+    const binaryString = String.fromCharCode.apply(
+      null,
+      Array.from(signature.contents)
+    );
+    const asn1 = forge.asn1.fromDer(binaryString);
+    const p7 = forge.pkcs7.messageFromAsn1(asn1) as any;
 
-        if (!p7.certificates || p7.certificates.length === 0) {
-            result.errorMessage = 'No certificates found in signature';
-            return result;
-        }
-
-        const signerCert = p7.certificates[0] as forge.pki.Certificate;
-
-        const subjectCN = signerCert.subject.getField('CN');
-        const subjectO = signerCert.subject.getField('O');
-        const subjectE = signerCert.subject.getField('E') || signerCert.subject.getField('emailAddress');
-        const issuerCN = signerCert.issuer.getField('CN');
-        const issuerO = signerCert.issuer.getField('O');
-
-        result.signerName = (subjectCN?.value as string) ?? 'Unknown';
-        result.signerOrg = subjectO?.value as string | undefined;
-        result.signerEmail = subjectE?.value as string | undefined;
-        result.issuer = (issuerCN?.value as string) ?? 'Unknown';
-        result.issuerOrg = issuerO?.value as string | undefined;
-        result.validFrom = signerCert.validity.notBefore;
-        result.validTo = signerCert.validity.notAfter;
-        result.serialNumber = signerCert.serialNumber;
-
-        const now = new Date();
-        result.isExpired = now > result.validTo || now < result.validFrom;
-
-        result.isSelfSigned = signerCert.isIssuer(signerCert);
-
-        // Check trust against provided certificate
-        if (trustedCert) {
-            try {
-                const isTrustedIssuer = trustedCert.isIssuer(signerCert);
-                const isSameCert = signerCert.serialNumber === trustedCert.serialNumber;
-
-                let chainTrusted = false;
-                for (const cert of p7.certificates) {
-                    if (trustedCert.isIssuer(cert) ||
-                        (cert as forge.pki.Certificate).serialNumber === trustedCert.serialNumber) {
-                        chainTrusted = true;
-                        break;
-                    }
-                }
-
-                result.isTrusted = isTrustedIssuer || isSameCert || chainTrusted;
-            } catch {
-                result.isTrusted = false;
-            }
-        }
-
-        result.algorithms = {
-            digest: getDigestAlgorithmName(signerCert.siginfo?.algorithmOid || ''),
-            signature: getSignatureAlgorithmName(signerCert.signatureOid || ''),
-        };
-
-        // Parse signing time if available in signature
-        if (signature.signingTime) {
-            result.signatureDate = new Date(signature.signingTime);
-        } else {
-            // Try to extract from authenticated attributes
-            try {
-                const signedData = p7 as any;
-                if (signedData.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;
-                        }
-                    }
-                }
-            } catch { /* ignore */ }
-        }
-
-        if (signature.byteRange && signature.byteRange.length === 4) {
-            const [start1, len1, start2, len2] = signature.byteRange;
-            const totalCovered = len1 + len2;
-            const expectedEnd = start2 + len2;
-
-            if (expectedEnd === pdfBytes.length) {
-                result.coverageStatus = 'full';
-            } else if (expectedEnd < pdfBytes.length) {
-                result.coverageStatus = 'partial';
-            }
-        }
-
-        result.isValid = true;
-
-    } catch (e) {
-        result.errorMessage = e instanceof Error ? e.message : 'Failed to parse signature';
+    if (!p7.certificates || p7.certificates.length === 0) {
+      result.errorMessage = 'No certificates found in signature';
+      return result;
     }
 
-    return result;
+    const signerCert = p7.certificates[0] as forge.pki.Certificate;
+
+    const subjectCN = signerCert.subject.getField('CN');
+    const subjectO = signerCert.subject.getField('O');
+    const subjectE =
+      signerCert.subject.getField('E') ||
+      signerCert.subject.getField('emailAddress');
+    const issuerCN = signerCert.issuer.getField('CN');
+    const issuerO = signerCert.issuer.getField('O');
+
+    result.signerName = (subjectCN?.value as string) ?? 'Unknown';
+    result.signerOrg = subjectO?.value as string | undefined;
+    result.signerEmail = subjectE?.value as string | undefined;
+    result.issuer = (issuerCN?.value as string) ?? 'Unknown';
+    result.issuerOrg = issuerO?.value as string | undefined;
+    result.validFrom = signerCert.validity.notBefore;
+    result.validTo = signerCert.validity.notAfter;
+    result.serialNumber = signerCert.serialNumber;
+
+    const now = new Date();
+    result.isExpired = now > result.validTo || now < result.validFrom;
+
+    result.isSelfSigned = signerCert.isIssuer(signerCert);
+
+    // Check trust against provided certificate
+    if (trustedCert) {
+      try {
+        const isTrustedIssuer = trustedCert.isIssuer(signerCert);
+        const isSameCert = signerCert.serialNumber === trustedCert.serialNumber;
+
+        let chainTrusted = false;
+        for (const cert of p7.certificates) {
+          if (
+            trustedCert.isIssuer(cert) ||
+            (cert as forge.pki.Certificate).serialNumber ===
+              trustedCert.serialNumber
+          ) {
+            chainTrusted = true;
+            break;
+          }
+        }
+
+        result.isTrusted = isTrustedIssuer || isSameCert || chainTrusted;
+      } catch {
+        result.isTrusted = false;
+      }
+    }
+
+    result.algorithms = {
+      digest: getDigestAlgorithmName(signerCert.siginfo?.algorithmOid || ''),
+      signature: getSignatureAlgorithmName(signerCert.signatureOid || ''),
+    };
+
+    // Parse signing time if available in signature
+    if (signature.signingTime) {
+      result.signatureDate = new Date(signature.signingTime);
+    } else {
+      // Try to extract from authenticated attributes
+      try {
+        const signedData = p7 as any;
+        if (signedData.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;
+            }
+          }
+        }
+      } catch (e) {
+        console.warn(
+          'Failed to extract signing time from authenticated attributes',
+          e
+        );
+      }
+    }
+
+    if (signature.byteRange && signature.byteRange.length === 4) {
+      const [start1, len1, start2, len2] = signature.byteRange;
+      const totalCovered = len1 + len2;
+      const expectedEnd = start2 + len2;
+
+      if (expectedEnd === pdfBytes.length) {
+        result.coverageStatus = 'full';
+      } else if (expectedEnd < pdfBytes.length) {
+        result.coverageStatus = 'partial';
+      }
+    }
+
+    result.isValid = true;
+  } catch (e) {
+    result.errorMessage =
+      e instanceof Error ? e.message : 'Failed to parse signature';
+  }
+
+  return result;
 }
 
 export async function validatePdfSignatures(
-    pdfBytes: Uint8Array,
-    trustedCert?: forge.pki.Certificate
+  pdfBytes: Uint8Array,
+  trustedCert?: forge.pki.Certificate
 ): Promise<SignatureValidationResult[]> {
-    const signatures = extractSignatures(pdfBytes);
-    return signatures.map(sig => validateSignature(sig, pdfBytes, trustedCert));
+  const signatures = extractSignatures(pdfBytes);
+  return signatures.map((sig) => validateSignature(sig, pdfBytes, trustedCert));
 }
 
 export function countSignatures(pdfBytes: Uint8Array): number {
-    return extractSignatures(pdfBytes).length;
+  return extractSignatures(pdfBytes).length;
 }
 
 function hexToBytes(hex: string): Uint8Array {
-    const bytes = new Uint8Array(hex.length / 2);
-    for (let i = 0; i < hex.length; i += 2) {
-        bytes[i / 2] = parseInt(hex.substr(i, 2), 16);
-    }
+  const bytes = new Uint8Array(hex.length / 2);
+  for (let i = 0; i < hex.length; i += 2) {
+    bytes[i / 2] = parseInt(hex.substr(i, 2), 16);
+  }
 
-    let actualLength = bytes.length;
-    while (actualLength > 0 && bytes[actualLength - 1] === 0) {
-        actualLength--;
-    }
+  let actualLength = bytes.length;
+  while (actualLength > 0 && bytes[actualLength - 1] === 0) {
+    actualLength--;
+  }
 
-    return bytes.slice(0, actualLength);
+  return bytes.slice(0, actualLength);
 }
 
 function getDigestAlgorithmName(oid: string): string {
-    const digestAlgorithms: Record<string, string> = {
-        '1.2.840.113549.2.5': 'MD5',
-        '1.3.14.3.2.26': 'SHA-1',
-        '2.16.840.1.101.3.4.2.1': 'SHA-256',
-        '2.16.840.1.101.3.4.2.2': 'SHA-384',
-        '2.16.840.1.101.3.4.2.3': 'SHA-512',
-        '2.16.840.1.101.3.4.2.4': 'SHA-224',
-    };
-    return digestAlgorithms[oid] || oid || 'Unknown';
+  const digestAlgorithms: Record<string, string> = {
+    '1.2.840.113549.2.5': 'MD5',
+    '1.3.14.3.2.26': 'SHA-1',
+    '2.16.840.1.101.3.4.2.1': 'SHA-256',
+    '2.16.840.1.101.3.4.2.2': 'SHA-384',
+    '2.16.840.1.101.3.4.2.3': 'SHA-512',
+    '2.16.840.1.101.3.4.2.4': 'SHA-224',
+  };
+  return digestAlgorithms[oid] || oid || 'Unknown';
 }
 
 function getSignatureAlgorithmName(oid: string): string {
-    const signatureAlgorithms: Record<string, string> = {
-        '1.2.840.113549.1.1.1': 'RSA',
-        '1.2.840.113549.1.1.5': 'RSA with SHA-1',
-        '1.2.840.113549.1.1.11': 'RSA with SHA-256',
-        '1.2.840.113549.1.1.12': 'RSA with SHA-384',
-        '1.2.840.113549.1.1.13': 'RSA with SHA-512',
-        '1.2.840.10045.2.1': 'ECDSA',
-        '1.2.840.10045.4.1': 'ECDSA with SHA-1',
-        '1.2.840.10045.4.3.2': 'ECDSA with SHA-256',
-        '1.2.840.10045.4.3.3': 'ECDSA with SHA-384',
-        '1.2.840.10045.4.3.4': 'ECDSA with SHA-512',
-    };
-    return signatureAlgorithms[oid] || oid || 'Unknown';
+  const signatureAlgorithms: Record<string, string> = {
+    '1.2.840.113549.1.1.1': 'RSA',
+    '1.2.840.113549.1.1.5': 'RSA with SHA-1',
+    '1.2.840.113549.1.1.11': 'RSA with SHA-256',
+    '1.2.840.113549.1.1.12': 'RSA with SHA-384',
+    '1.2.840.113549.1.1.13': 'RSA with SHA-512',
+    '1.2.840.10045.2.1': 'ECDSA',
+    '1.2.840.10045.4.1': 'ECDSA with SHA-1',
+    '1.2.840.10045.4.3.2': 'ECDSA with SHA-256',
+    '1.2.840.10045.4.3.3': 'ECDSA with SHA-384',
+    '1.2.840.10045.4.3.4': 'ECDSA with SHA-512',
+  };
+  return signatureAlgorithms[oid] || oid || 'Unknown';
 }