Both files are rendered page by page. A pixel-difference pass paints changed areas so you can spot inserted, deleted, or moved content at a glance.
Compare two PDFs
Side-by-side visual diff that highlights changed regions per page.
Compare two PDFs: Side-by-side visual diff that highlights changed regions per page. Add your file to the tool above, apply it, and download the result — free, in any browser, with no sign-up.
- 100% free — no sign-up
- Files processed privately
- Fast — no upload wait
- No file-count limit
About this tool
How to use Compare PDF
1. Add your file
Drop your file onto the Compare PDF workspace above, or click to browse for it.2. Choose the options
Adjust the settings for compare pdf — the defaults work for most files.3. Download the result
The result is generated in your browser — nothing is uploaded. Click Download to save it.
Frequently asked questions
Is Compare PDF free to use?
Yes. Compare PDF is completely free with no watermark, no account, and no file-count limit.
Are my files uploaded to a server?
No. Processing happens in your browser using WebAssembly and the Canvas API. Your documents never leave your device.
Which browsers are supported?
Any modern browser — Chrome, Edge, Firefox, or Safari. No extension or desktop app is required.
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