🔍 Compare PDFs
Spot differences between two PDF versions
🔒 Your image never leaves your device. All processing happens locally in your browser using pdfjs-dist + diff (client-side). No upload, no server, no tracking.
Features
- Side-by-Side View — Both PDFs render next to each other with differences highlighted.
- Text & Layout Diffs — Detects text changes, inserted/deleted pages, and moved content.
- Downloadable Report — Export a diff summary as a printable PDF.
- 100% Private — Both files stay in your browser.
How It Works
- Upload original PDF — Drop or browse.
- Upload revised PDF — Drop or browse the new version.
- Compare — Click Compare — results appear instantly.
- Download report — Save the diff summary if you want.
Use Cases
- Check contract revisions before signing
- Spot edits between book drafts
- Compare legal filings version to version
Frequently Asked Questions
Does it compare images?
Visually yes, but pixel-level image diffs are not highlighted — text and layout are.
Upload to server?
No. Both PDFs stay in your browser.
Max size?
Around 100 MB per file.
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