Step 1 — Open Two PDF Files
Original PDF
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Modified PDF
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Upload two PDFs and see exactly what changed between them — added text, removed content, and modified sections highlighted visually. Local processing.
PDF comparison identifies differences between two versions of a document — useful for reviewing contract revisions, checking that a final version matches the approved draft, or auditing changes between document versions. The comparison highlights additions, deletions, and modified sections so reviewers can focus only on what changed rather than reading both documents in full.
Contract review. Verify that a revised contract returned by the counterparty matches the agreed changes — and hasn't introduced additional modifications you didn't approve.
Document version control. Check whether the "final" version of a report or policy document matches the last approved draft, especially when documents pass through multiple people before sign-off.
Compliance auditing. Confirm that a regulatory submission or compliance document hasn't changed between the draft reviewed internally and the version submitted externally.
Proofreading. Spot differences between a marked-up draft and the supposedly corrected final version, catching any corrections that were missed.
Template verification. Confirm that a filled-in document based on a template hasn't accidentally overwritten or deleted boilerplate clauses.
Does the comparison work on scanned PDFs?
Scanned PDFs contain no text layer — only images. Text-based comparison requires a searchable text layer in both documents. Run OCR on scanned files first using rifix.xyz/ocr to add a text layer, then compare.
Are my documents uploaded to a server?
No. Both PDFs are processed entirely in your browser. Your document content — including any sensitive contract terms, financial figures, or confidential clauses — never leaves your device.
Can I compare PDFs in different languages?
Yes. The comparison works on text content regardless of language. Unicode text including Latin, Cyrillic, Arabic, Chinese, and other scripts is compared character by character.
What if the page count is different between the two versions?
Page additions and deletions are treated as added or removed content blocks. The comparison shows which pages are new or missing and highlights the content differences on matching pages.
Upload two PDFs and see exactly what changed between them — added text, removed content, and modified sections highlighted visually. Local processing.
PDF comparison identifies differences between two versions of a document — useful for reviewing contract revisions, checking that a final version matches the approved draft, or auditing changes between document versions. The comparison highlights added content, removed content, and changed sections. For legal documents, contracts, and compliance materials where tracking changes is critical, visual comparison saves significant manual review time. Both documents are processed entirely in your browser — your contract terms and sensitive document content never leave your device.
All tools on rifix.xyz process files entirely in your browser. No document content is uploaded to any server. Processing happens on your own device — your files stay completely private.