Find every defined-term error in your contract — in minutes, not hours.

Upload a Word document. DefCheck highlights every defined term that's never used, every capitalized term that's never defined, and suggests the term you probably meant — then hands you a findings report ready to review yourself or paste into an AI assistant.

U.S. Patent 10,713,482 Finds 98%+ of expert-confirmed issues Processed in memory — never stored

Single document Paired documents

Drop your Word document here

or click to browse — DOC or DOCX, up to 4 MB (free version)

Flag lower-cased uses Mark cross-references Ignored terms (0)

Your document is processed in memory and permanently deleted the moment the check completes — nothing is ever written to disk.

What the highlights mean

Defined term, used correctly Definition never used Capitalized term, not defined In a heading (informational)

Findings report

Run a check. A 50-page agreement takes seconds; 200+ pages, two to three minutes.

Get two things back: a PDF of your document with every term color-highlighted, and a findings report here — each issue with page number, context, and the defined term you probably meant. Page numbers in the report match the PDF exactly.

Optionally, paste the report into an AI assistant like Claude or ChatGPT for a reviewer-style memo. The report shares only flagged snippets — never your document.

See a sample findings report →

Why it matters

A 150-page agreement can carry 400+ defined terms. One misused or undefined term creates ambiguity — and defined-term errors have led to costly lawsuits.

Measured, not guessed

Benchmarked against SEC-filed agreements hand-reviewed by a securities attorney: DefCheck surfaces 98%+ of expert-confirmed issues while filtering out ~75% of the noise (TOCs, headings, signature pages).

It knows the common slips

Suggestions draw on 30,000+ human-reviewed flags across 7,200 SEC contracts. When your draft says "Issuing Bank" but defines "Issuing Lender," it tells you which term you meant.