Compare PDF

Word-level diff between two PDF versions, side by side.

Drop the ORIGINAL PDF here

Your file never leaves your device · No signup · No daily limit

Up to 100 MB per file

Drop the MODIFIED PDF here

Your file never leaves your device · No signup · No daily limit

Up to 100 MB per file

How it works

Drop the original PDF on the left and the modified version on the right.
Run the comparison: text is extracted page by page and diffed word by word.
Review per-page cards: additions highlighted in green, deletions struck through in red, with +/− counts per page and a total summary.
Swap the two files with one click if you loaded them in the wrong order.

The diff is text-level: wording changes are caught precisely, but layout shifts, image changes, and formatting-only edits are not flagged.
Pages are compared by position (page 3 vs page 3); an inserted page shifts later comparisons and shows as heavy add/remove around the insertion.
Extremely dense pages fall back to line-level diffing past 20,000 tokens to stay fast.

Only if they contain a text layer. Run both files through PDF OCR first, then compare the searchable versions.

A moved block appears as a deletion in its old place and an addition in the new one. The tool does not track movement as a separate change type.

Yes. Extraction and diffing run in your browser; neither version is uploaded. Which is exactly what you want when comparing unsigned contract drafts.