Private by design
This tool processes files locally in your browser whenever supported.
Drop two PDFs here
Choose the two PDF files you want to compare. pdfcat will prepare the workspace and generate a difference summary in your browser.
By using pdfcat, you agree to process your file locally and securely in your browser.Files
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Free PDF tool
Compare PDF Files Online Free
Compare two PDF files online for free with pdfcat. Review page count, file size, and text differences without signing up.
Focused workflow
Compare two PDFs by page count, file size, and extracted text so you can quickly spot high-level differences.
No watermark
pdfcat does not add a watermark to your completed file.
Common questions
Compare PDF FAQ
How do I compare PDF files?
Upload the required file, choose the options for Compare PDF, preview the result, and download the finished file.
Is Compare PDF free?
Yes. pdfcat requires no account and does not add a watermark to the finished file.
Does pdfcat upload my file?
This tool runs in your browser whenever the required capability is supported. Any hosted processing is clearly identified before upload.