Compare PDF Files Side-by-Side Free
Visually compare two PDF files side-by-side to spot changes and text differences.
How to Compare PDF
Upload Two PDFs
Select the two PDF documents you want to compare for differences side by side.
Review Differences
View both documents side-by-side with visual highlights marking text and formatting changes.
Download Comparison
Review and save or export the comparison results showing all detected differences.
Compare two PDF documents side-by-side
Spot differences between drafts, versions, or legal documents. Upload two PDFs side-by-side and see visual highlights of text and formatting variations.
The comparison runs entirely in your local browser workspace. No document data is sent over the network, protecting your proprietary agreements.
Frequently Asked Questions
How secure is Compare PDF?
Compare PDF uses industry-standard algorithms processed entirely within your browser. No passwords, encryption keys, or file data are transmitted over the internet, making it as secure as offline desktop software.
Is it safe to use Compare PDF with confidential documents?
Absolutely. Compare PDF processes everything locally inside your web browser using JavaScript and WebAssembly. Your files are never uploaded to any external server. Sensitive documents, contracts, and personal files remain completely private on your device.
Is Compare PDF really free? Are there hidden limits?
Yes, Compare PDF is 100% free with no hidden costs. There are no file size limits, no daily usage caps, no watermarks on your output, and no account registration required. Use it as many times as you need.
Can I compare PDFs with different page counts?
Yes. The tool compares documents page-by-page. Extra pages in the longer document are highlighted as additions.