What is this PDF compare tool?
A free, browser-based tool that compares the text of two PDFs and shows the differences line by line — added lines in green and removed lines in red. There's nothing to install and no sign-up, and because everything runs locally in your browser, your files are never uploaded to a server.
How to compare two PDFs
- Upload the first PDF as “Original” and the second as “Changed”.
- The tool extracts the text from both PDFs and computes a line-level diff automatically.
- Review the highlighted diff and the summary of additions and deletions. Optionally download the diff as a .txt file.
Common use cases
- Checking what changed between two revisions of a contract or proposal.
- Verifying that a re-exported document matches the original wording.
- Spotting unintended edits before sending out a final version.
Good to know
This tool compares the text layer of each PDF, so it works best with text-based documents. Scanned, image-only PDFs without a text layer won't produce a diff. The comparison is text-level — visual or pixel differences are out of scope.