What it does
PDF Compare highlights the differences between two PDFs, covering both text changes and visual page differences.
- Text + visual diff
How do I compare two PDFs?
Compare two PDFs by uploading both; the tool highlights the differences between them — changed text and visual changes — side by side so you can spot edits quickly. Review the highlighted diff in your browser, with neither file uploaded.
- Side-by-side and overlay comparison
- Highlights added, removed and changed text
- Visual page-difference view
- 100% client-side
What is
PDF Compare
A tool that detects and highlights the differences between two versions of a PDF, in text and appearance.
PDF Tools
Related terms
diffversion compare
Frequently Asked Questions
Yes.
Added, removed and modified text is highlighted so you can see exactly what changed between versions.
Yes.
A pixel-level page overlay reveals layout and graphic changes as well as text.
No.
Both PDFs are compared locally in your browser.
Detailed Explanation
How it works
Text is extracted with pdf.js and diffed; pages are also rendered to canvases and compared pixel-by-pixel for a visual overlay.
- Text diff + pixel diff
Use cases
Check contract revisions, proofread document versions, and confirm what changed between drafts.
- Contracts and drafts
Limitations
Very different layouts can make alignment harder; scanned PDFs compare visually rather than by text.
- Alignment on big changes
Privacy
Both files are compared in the browser and are never uploaded.
- 100% local