Compare two PDFs
Compare the text of two versions page by page: additions and deletions are highlighted, with a changed-pages summary and a downloadable report.
Your files never leave your device
How to compare two PDFs
- 1
Upload both versions
The original document and the modified one.
- 2
Compare
Text is extracted per page and differences are computed.
- 3
Review and download
Highlighted diffs per page + .txt report.
Why use this tool
Page by page
Know exactly which pages changed and which did not.
Side by side
Removed in red on the left, added in green on the right.
Honest
We compare text: if a change is visual only, we tell you we cannot see it.
Private
Neither document leaves your device.
Frequently asked questions
What kind of differences does it detect?
Differences in extractable TEXT: added, removed or modified lines. Changes to images, colors, fonts or positions are not detected.
How are the documents aligned?
Page 1 with page 1, page 2 with page 2, and so on. Within each page, lines are aligned with a longest-common-subsequence (LCS) algorithm, the same principle git uses.
Does it work with scanned PDFs?
Only if they have a text layer (OCR). A pure scan has no text to compare and its pages will appear empty.
Can I save the result?
Yes, you can download a .txt report with the summary and every added and removed line per page.