Compare PDF
See the differences between two PDF documents side by side.
Original (A)
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Compared (B)
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Frequently asked questions
Is it really free?+
Yes. Compare PDF is 100% free — no sign-up, no watermarks. We cap usage at 10 operations per day per visitor to keep the service fast for everyone.
Are my files private?+
For most tools your file never leaves your browser — everything runs locally. For Office conversions (which need LibreOffice on our server), files are processed and deleted immediately after conversion.
Is there a file size limit?+
Browser-based tools depend on your device's memory; most files under 200 MB work fine. Server-side conversions are capped at 50 MB.