Lawyers charge $500/hr to read contracts. ContractDiff scans for gotcha clauses and diffs versions like GitHub for legal — in seconds, entirely on your machine.
How it works: a deterministic pattern engine (18 expert-curated clause signatures) — not a trained model, no API calls, no data leaves this page. PDF, Word and text files parse locally in your browser.
Risk Scanner
Upload or paste any contract, ToS, or NDA. The scanner hunts 18 known gotcha patterns and explains each in plain English with counter-language you can send back.
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Drop a contract here — PDF, Word (.docx) or .txtor click to browse · parsed 100% locally
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Risk score
Scan summary
Words analyzed—
High-severity flags—
Medium-severity flags—
Advisory flags—
Estimated lawyer review cost avoided—
Version Diff
Old version left, new version right — PDF, Word or text on either side. Word-level diff shows every change, and the added language is re-scanned for new traps.
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Version A — originalPDF / .docx / .txt
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Version B — updatedPDF / .docx / .txt
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0words removed
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0risky changes
Gotcha Clause Library
The 18 patterns the scanner hunts — what they mean, why they hurt, and the counter-language to request.