Compare PDF
Upload two PDFs to see what changed between them
Original Document
Drop the original PDF here
Modified Document
Drop the modified PDF here
How it works
Upload two PDFs
Drop the original and modified versions
Auto-detect changes
We compare every pixel on each page
View the diff
See changes highlighted in side-by-side, overlay, or diff view
Compare PDF — find differences between files, free
Compare two PDF documents online for free and spot the differences instantly. Our compare PDF tool shows your files side by side and highlights what changed between versions — great for contracts, drafts, and revisions, with no signup.
Comparing PDFs saves you from manually hunting for edits. Files are processed securely and deleted automatically afterwards.
How to compare pdf
- 1
Upload your file
Drag and drop your file into the box above, or click to browse and select it from your device.
- 2
Choose your options
Adjust the available settings to get exactly the result you need for compare pdf.
- 3
Run the tool
Click the Compare PDF button and our servers process your file in seconds.
- 4
Download the result
Save your finished file instantly. It's automatically deleted from our servers afterwards.
Why use our compare pdf tool?
100% free
Compare PDF is completely free with no hidden fees, sign-ups, or usage limits.
Fast & secure
Files are processed on secure servers over HTTPS and deleted automatically after a short time.
Works on any device
Runs in any modern browser on desktop, tablet, or mobile — nothing to download.
Compare PDF — frequently asked questions
How do I compare two PDFs for free?+
Upload both PDFs and click Compare. The tool shows them side by side and highlights the differences.
Does it highlight changes?+
Yes. Differences between the two documents are highlighted so they're easy to see.
What's it useful for?+
Comparing contract versions, document drafts, and any revisions where you need to find what changed.
Is it secure?+
Yes. Files are uploaded over encrypted HTTPS and deleted automatically after processing.