Compare two PDFs
Drop the old version and the new version. Changed lines line up side by side with the exact words highlighted — so you know precisely what was edited in that contract, paper or terms-of-service before you sign off on it.
How it works
- Drop both PDFs — 🅰️ the older version, 🅱️ the newer one (add them together or one after the other).
- Compare. Each page's text is extracted and aligned; identical lines stay quiet, changes glow red (removed) and green (added), down to the word.
- Keep a record. Download the plain-text report listing every change per page.
Frequently asked questions
What exactly is compared?
The text layer — the words on each page, in reading order. Layout shifts, fonts, colors and images are not compared; a paragraph that moved but kept its wording shows as unchanged.
Can I compare scanned documents?
Scans have no text layer, so there's nothing to diff. Run both files through the OCR tool first to give them a text layer, then compare the results.
The two versions have different page counts — does that work?
Yes. Pages are compared one-to-one and any extra pages are flagged; the summary warns you that the counts differ.
Are my documents uploaded?
No — and for unsigned contracts, that's not a small thing. Both files are read and compared entirely in your browser.