Compare PDF
Spot the differences between two PDFs, side by side.
Processed in your browser. Your files are not uploaded.
How to use Compare PDF
- Step 1
Add both versions
Select the original (version A) and the modified PDF (version B).
- Step 2
Review the changes
Compare page by page side by side, as a highlighted difference or with a slider, with every added, removed and altered line listed.
- Step 3
Export a report
Download a PDF report of the differences.
Frequently asked questions
How are differences found?
Pages are rendered and compared pixel by pixel (added ink in green, removed in red), and their text is compared line by line, with altered lines compared word by word.
What if pages were added or removed?
Pages are compared in order, so an inserted page shifts the rest. The text comparison still lists what changed.
Are my files kept private and secure?
Yes. The tool runs entirely in your browser: your files are processed on your device and never uploaded to our servers, so there's nothing for us to store, see or leak.
Is there a file size limit for free users?
Free accounts and guests can process files up to 10 MB. Pro and Team raise the limit to 100 MB per file.
Do I need to create an account or install software?
There's nothing to install: the tool runs in your web browser. You can drop a file and process it right away without an account. To download the result, sign in or create a free account (3 free downloads a month), or go Pro for unlimited downloads.
Is it free?
Yes. With a free account you can download up to 3 files a month from any tool, or upgrade to Pro for unlimited use.