Compare PDFs
Original
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Supports PDF files up to 100MB
Revised
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Supports PDF files up to 100MB
Compare Two PDFs Online Free
See exactly what changed between two versions — added lines, removed lines, and a similarity score.
How to Use Compare PDFs
1
Upload the original PDF.
2
Upload the revised PDF.
3
Review the added, removed, and changed text side by side.
Frequently Asked Questions
What does the similarity score mean?
It is the percentage of text the two documents share. 100% means the text is identical; lower scores mean more changes were detected.
Are my files secure?
Yes. Files are processed over secure connections and are not stored after your session.
Do I need to install anything?
No. Everything runs in your browser on any device.