How to compare and diff pdf contract revisions
- Step 1Upload the previous contract version — Drop the original draft into the diff tool.
- Step 2Upload the revised contract — Drop the counterpart's revisions alongside.
- Step 3Compare and review changes — Step through each highlighted change.
- Step 4Accept, reject, or note — Mark each change for acceptance, rejection, or discussion in the negotiation.
Frequently asked questions
Can I use PDF diff to review an NDA received as a PDF?+
Yes — compare your template NDA with the received version to instantly see all changes made by the counterpart.
Does the tool work on PDFs with track changes already applied?+
The tool compares two distinct PDF files. PDFs with embedded Track Changes from Word conversion may show formatting artefacts — compare the clean PDF versions instead.
What if the page numbering changed between versions?+
The diff compares text content, not page layout. Page number differences are treated as text changes.
Privacy first
All PDF processing runs locally in your browser using PDF-lib and pdf.js. No file is ever uploaded — only metadata counters are saved for signed-in dashboard stats.