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Compare two PDFs

Add the old and new version of a document and see every word that was added or removed, highlighted.

Your files never leave your device
Original PDF

Changed PDF

Files stay in this browser tab. Close the page and they are gone.

How it works

  1. Add the original PDF.
  2. Add the changed PDF.
  3. Read the highlighted differences.

Questions

Does it compare images and layout?

It compares the text. Changes to pictures, colours or layout are not shown.

Does it work with scanned PDFs?

Scans have no text to compare. Run them through OCR PDF first, then compare.

Are my files uploaded anywhere?

No. The tool runs entirely in your browser, so your files never leave your device and nothing is kept after you close the page. You can check it yourself: once the page has loaded, turn on airplane mode — the tool keeps working.

Is it free? Is there a file limit?

Yes, it is free, with no sign-up and no watermark. There is no upload limit because nothing is uploaded; very large files are limited only by your device’s memory.

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