Compare PDF Documents
Side-by-side visual and revision comparison between two PDF documents.
Document A (Original)
Upload Document A
First version / original PDF
Document B (Modified Revision)
Upload Document B
Revised / modified PDF
How to use Compare PDF in 3 easy steps
No software installation required. 100% free and runs smoothly on mobile, tablet, or desktop.
1. Upload Document A
Select your initial or baseline PDF version.
2. Upload Document B
Select the revised or newly edited PDF version.
3. Compare Revisions
Navigate through pages side-by-side to review changes.
Guaranteed Document Confidentiality
Your files stay on your machine. Client-side tools do not send your files to our servers.
Frequently Asked Questions
Everything you need to know about Compare PDF on HoudiniPDF.
How does side-by-side comparison work?
Both documents are rendered page-by-page in synchronization so you can spot layout, wording, and numerical revisions.
Can I compare documents with different page counts?
Yes! The navigator allows browsing all pages of whichever document is longer.
Are contracts safe to inspect here?
Yes, 100% in-browser processing guarantees that contracts and legal documents never leave your computer.
Is there any fee or subscription required?
No, HoudiniPDF is completely free.
Can I print or download a diff report?
You can download each version independently or annotate differences with "Edit PDF".
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