Visually Compare Two PDF Files
Upload two PDF documents and instantly highlight the exact pixel differences between them locally in your browser.
Spot Tiny Changes Automatically
Don't rely on your eyes to find differences in revised contracts or designs. Our tool highlights exact pixel changes in red.
How to Compare PDFs
Upload Original
Select the first version of your PDF.
Upload Revision
Select the second version to compare.
View Highlights
We render both and overlap them to expose any additions or deletions in red.
Perfect for Contracts & Proofs
Lawyers and designers use our visual diff tool to ensure no unauthorized changes were snuck into a document.
Confidential Document Comparison
Comparing sensitive NDA contracts? Our tool is 100% local. The documents never touch our servers.
Real-Time Diff Rendering
Generate visual diffs instantly in your browser thanks to hardware-accelerated canvas rendering.
Frequently Asked Questions
Does it find text or pixel differences?
It renders the PDF and finds visual pixel differences, which includes text, fonts, and images.
What do the red marks mean?
Red highlights indicate areas where the two PDFs differ visually.
Is it safe for legal documents?
Yes, all processing is strictly local and private.