Compare PDFs
Side-by-side text diff between two PDFs, page by page.
Drop your PDF here, or click to browse
Add multiple PDFs — drag-and-drop or click
Updated 2026 · Maintained by the CrispPDF team
Contract revisions, policy updates, and document versions often differ by just a few words—but finding those words manually is tedious. CrispPDF's Compare tool highlights every addition, deletion, and change between two PDFs.
Upload both versions and view a side-by-side diff. Added text appears in green, deleted text in red, and unchanged content stays neutral. Scroll through pages to catch every modification.
For legal teams reviewing contract amendments, the visual diff ensures nothing slips past. For educators comparing draft and final student submissions, it speeds up grading.
Because comparison runs in your browser, confidential documents stay private. After comparing, merge the preferred version with other files or compress for email.
// How to use
How to use Compare PDFs
- 1
Upload both PDFs
Drop the original PDF on the left and the revised PDF on the right.
- 2
Run the diff
Click Compare. CrispPDF highlights added, removed, and moved text page by page.
- 3
Review changes
Step through the changes with side-by-side previews and colour-coded markers.
- 4
Download the diff report
Save a PDF report of the differences — perfect for contract review and version audits.
// Why CrispPDF
Why use CrispPDF for compare pdfs?
CrispPDF runs entirely in your browser — your files never touch a server. No signup, no watermarks, no daily limits, no upsells. We built it because every other PDF site is slow, ad-stuffed, or hides the good features behind a paywall. CrispPDF is fast on a phone, fast on a laptop, fast on a 10-year-old machine. Output is byte-clean: signatures stay sharp, compressed PDFs stay readable, conversions preserve layout where the source allows. And because nothing leaves your device, even confidential documents are safe to process. Bookmark this page, share it with your team, and stop juggling five different PDF sites for five different tasks.
- No signup, no email gate
- No watermarks on output
- Files never stored on a server
- Works on phone, tablet, and desktop
// FAQ
Compare PDFs — frequently asked questions
+How to compare an old and new PDF to see what changed?
Upload both files to CrispPDF and view the highlighted diff instantly.
+Will it highlight the exact text differences?
Yes. Additions, deletions, and changes are color-coded for easy scanning.
+Is this tool secure for contracts?
Yes. Both files stay on your device—nothing is uploaded to CrispPDF servers.
+How do I compare two PDF files for differences?
Upload both to CrispPDF's Compare tool and review the visual diff.
+Can I see highlighted text changes side-by-side?
Yes. The tool displays both versions with changes color-marked.
+Is there a free PDF diff tool?
Yes. CrispPDF is 100 % free—no signup, no watermark.