Compare PDF
See text differences between two PDF versions.
or drop files here
Processed on your device — never uploaded
How to use Compare PDF
See what changed between two versions of a document.
- Select two PDFs — the original first, the new version second.
- Press Compare.
- Review removed (red) and added (green) passages side by side; download the report as HTML.
Tips for best results
- Comparison is text-based. For scanned PDFs, run OCR PDF on both files first.
Questions
Does it compare images?
No, only text content.
Is Osd-Scan really free?
Yes. Every web tool is free with no sign-up, no watermark and no daily limit. The website is supported by ads. A paid desktop app for Windows (one-time purchase, no ads) is coming soon.
Are my files uploaded to a server?
No. All processing happens inside your browser on your own device. Your documents never leave your computer or phone, so nobody — including us — can see them. You can even disconnect from the internet after the page loads.
Which browsers are supported?
Current versions of Chrome, Edge, Firefox, Safari and Samsung Internet on Windows, macOS, Linux, Android and iPhone/iPad. For the camera scanner on a phone the page must be opened over https.