Compare PDF Files
A free, secure, and fast way to find differences between two PDF documents.
How to Compare PDFs in 3 Steps
1. Select Your PDFs
Upload two PDF files you want to compare. The files are processed securely in your browser, **never uploaded** to any server.
2. Compare Documents
Click "Compare PDFs" to analyze both documents. Our tool will highlight text differences and display side-by-side comparison.
3. Review Differences
Examine highlighted changes with synchronized scrolling. Added text appears in green, removed text in red with strikethrough.
Your Security is Our Priority
100% Private & Secure
Your PDFs are processed entirely in your browser. No files are ever uploaded to a server, guaranteeing your data's privacy.
Instant, Browser-Based
Because there are no uploads, the comparison process is instant. Your PDF comparison is ready as soon as you click the button.
Completely Free
Compare unlimited PDF files for free. No watermarks, no limits, and no registration required.
Frequently Asked Questions
Is it safe to compare confidential PDFs with this tool?
Yes. This tool is **100% secure**. All processing happens locally in your web browser. Your PDF files are never uploaded to any server, so your sensitive information remains completely private.
What types of differences can this tool detect?
Our PDF comparison tool primarily detects text differences. It highlights added text in green and removed text in red with strikethrough. For visual changes, you can also view the documents side-by-side with synchronized scrolling.
Can I compare scanned PDF documents?
This tool works best with text-based PDFs. For scanned documents (image-based PDFs), you would need to use our PDF OCR tool first to extract text, then compare the resulting text-based PDFs.
Does the tool work with password-protected PDFs?
No, this tool cannot process password-protected or encrypted PDFs. You would need to remove the password protection first using our Unlock PDF tool before comparing.