Free Online PDF Tool
Compare Two PDF Files
Upload two versions of a PDF and see the differences between them highlighted side by side.
Open Compare PDF →No signup required · Free up to 20MB per file
How to Use Compare PDF
- Upload the original and the revised PDF files.
- Click Compare.
- Review the highlighted differences between the two versions.
Frequently Asked Questions
What kind of changes does this detect?
It highlights differences in the visible content between the two files, making it easy to spot what changed between versions.
Is my file uploaded to a server?
No. This tool runs entirely in your browser — your file is never uploaded anywhere, so nothing ever leaves your device.