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bentopdf/docs/tools/page-dimensions.md

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2026-03-20 21:48:48 +05:30
---
title: Page Dimensions
description: Analyze PDF page sizes, orientations, aspect ratios, and rotation. Detect mixed-size documents and export data to CSV.
---
# Page Dimensions
A diagnostic tool that reads every page in your PDF and reports its exact dimensions, orientation, standard size name, aspect ratio, area, and rotation. Useful for catching mixed-size pages before printing or for documenting the properties of a PDF you received.
## How It Works
1. Upload a PDF file. Analysis starts automatically -- no button to press.
2. A summary panel shows total pages, number of unique page sizes, and whether the document has mixed sizes.
3. Browse the full results table with per-page details.
4. Switch display units between Points, Inches, Millimeters, or Pixels.
5. Click **Export to CSV** to save the data.
## Reported Fields
| Column | Description |
| ------------- | ------------------------------------------- |
| Page # | Sequential page number |
| Dimensions | Width x Height in the selected unit |
| Standard Size | Matched name (A4, Letter, etc.) or "Custom" |
| Orientation | Portrait or Landscape |
| Aspect Ratio | Width-to-height ratio as a decimal |
| Area | Page area in the selected unit squared |
| Rotation | Page rotation in degrees |
## Features
- Automatic detection of standard paper sizes (A3, A4, A5, Letter, Legal, Tabloid, and more)
- Mixed-size document warning with a breakdown of which sizes appear and how many pages use each
- Unit conversion between points, inches, millimeters, and pixels (at 96 PPI)
- CSV export for use in spreadsheets or documentation systems
## Use Cases
- Verifying all pages are A4 before submitting a document to a print shop
- Diagnosing why a merged PDF prints with unexpected margins on certain pages
- Documenting the page layout of a large PDF archive for metadata records
- Identifying rotated pages that need correction
## Tips
- If the summary shows "Mixed Sizes," use the Fix Page Size tool to standardize before printing.
- The rotation field helps identify pages that display correctly but have a non-zero rotation attribute, which can cause issues in some workflows.
## Related Tools
- [Fix Page Size](./fix-page-size) -- standardize pages after identifying mixed sizes
- [Compress PDF](./compress-pdf) -- optimize the PDF after fixing page issues
- [Rotate PDF](./rotate-pdf) -- correct rotated pages