How does PDF comparison work?

We extract text from both PDFs and run a word-level diff algorithm. Changes are highlighted in green (additions) and red (deletions).

Does it work with scanned PDFs?

It works best with text-based PDFs. For scanned documents, run OCR first to make text extractable.

Is my document private?

Many tools run in your browser so files may never leave your device. When cloud processing is used, uploads are transferred over HTTPS, processed on our workers, and staging files are removed automatically per our retention policy.

Can I compare more than 2 files?

Currently the tool compares two PDFs at a time. For multiple versions, compare them in pairs.

Compare PDF Online — Side-by-Side Diff Tool | PDFTrusted

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Compare PDF Online — Side-by-Side Diff Tool | PDFTrusted | PDFTrusted