How do I compare two PDF files?

Upload both the original PDF and the revised PDF together on our Compare PDF tool to run parallel visual and text scanning.

Will the tool highlight text changes?

Yes, our backend text diff algorithm highlights added text, deleted text, and layout shifts.

Yes, our interactive frontend includes synchronized scrolling, allowing you to visually review differences side-by-side.

The downloadable comparison report will follow our naming rule: xy_compared.pdf.

Yes, like all our services, Compare PDF is 100% free with no premium limitations or watermarks.

Yes. Files are processed in our secure sandboxed environments and auto-deleted from our servers within 30 minutes.

For scanned PDFs, we recommend running OCR on both documents first so text differences can be highlighted properly.

Yes! While side-by-side view is best on desktop, our responsive layouts adapt for mobile scrolling.

Our engine will align matching pages and highlight pages that have been completely added or deleted.

You can upload files up to 50MB each.

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Choose original and revised files

🔒 Fully secure in-memory processing.