Compare PDF
Compare visual differences side-by-side between two of your PDF files.
First PDF Document
Select PDF file 1
Second PDF Document
Select PDF file 2
About Compare PDF Online
Compare two PDF documents online to find text and layout changes visual difference for free.
How to Use Compare PDF
Select First PDF
Upload the original or draft version of your PDF file.
Select Second PDF
Upload the revised or final version of your PDF file.
Highlight Changes
View the side-by-side comparison to instantly locate added, deleted, or modified text.
Specifications & System Limits
100% Client-Side Privacy
Files are processed entirely within your browser memory via WebAssembly. Your documents never touch external servers.
Super Fast & No Waiting
Instant high-speed conversion with ultra-low latency. Never wait in arbitrary processing queues.
100% Free & No Watermarks
All PDF tools are accessible free of charge without watermarks, hidden paywalls, or required registration.
Frequently Asked Questions (FAQ)
Our tool parses both PDF files and compares their layouts and characters to visually highlight differences so you do not have to spot them manually.
No, this comparison tool is free and has no usage limits.
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Give us a star rating or report any bugs you encountered with this tool.
About Compare PDF Online
Compare two PDF documents online to find text and layout changes visual difference for free.
How to Use Compare PDF
Select First PDF
Upload the original or draft version of your PDF file.
Select Second PDF
Upload the revised or final version of your PDF file.
Highlight Changes
View the side-by-side comparison to instantly locate added, deleted, or modified text.
Specifications & System Limits
100% Client-Side Privacy
Files are processed entirely within your browser memory via WebAssembly. Your documents never touch external servers.
Super Fast & Reliable
Instant high-speed conversion with ultra-low latency. Never wait in arbitrary processing queues.
100% Free & No Watermark
All tools on KAOpdf are completely free with no watermarks, no file limits, and no account registration required.
Frequently Asked Questions (FAQ)
How does KAOpdf compare documents?+
Our tool parses both PDF files and compares their layouts and characters to visually highlight differences so you do not have to spot them manually.
Is there any cost for comparing PDFs?+
No, this comparison tool is free and has no usage limits.