About ContractScanner

What this tool is, how it works, and what it isn't

What ContractScanner is

ContractScanner is a free tool for getting a fast first read on a contract before you sign it. Paste in the text (or drop in a PDF, DOCX, or TXT file) and it scans for common red-flag clauses — unfair liability terms, one-sided IP assignment, no-notice termination, overly broad non-competes, auto-renewal traps, and more — and explains each one in plain English, with a suggested starting point for negotiation.

How it actually works

ContractScanner is not powered by a large language model. It runs a library of pattern-matching rules against the text you paste, entirely in your browser — nothing is uploaded to a server. Each rule looks for the kind of wording that commonly signals a specific type of risky clause, and when it matches, ContractScanner shows you the exact excerpt, an explanation of why it matters, and negotiation language to consider.

We built it this way deliberately: pattern matching is predictable, fast, free to run at scale, and — because nothing leaves your browser — it means contract text you paste in never touches a server, a database, or a third party. That's true regardless of your plan; the free account required to scan (one scan per account) exists only to manage usage limits and billing, and is never connected to what you actually scan. You can read the full list of what it checks for in the clause glossary.

What ContractScanner is not

It's not a law firm, and it doesn't provide legal advice. A pattern scan can miss risky clauses that are unusually worded, and it can flag language that isn't actually a problem in your specific situation. Think of it as a fast, free first pass — not a replacement for a licensed attorney, especially for contracts with real financial or legal stakes.

Why we built it

Most people sign contracts — freelance agreements, NDAs, leases, employment offers — without a lawyer reading them first, usually because a full legal review isn't worth the cost for a routine agreement. ContractScanner exists to close part of that gap: giving anyone an instant, free way to catch the most common problems before they sign, and to understand in plain language what they're actually agreeing to.

Questions or feedback

Visit our contact page or email us directly at hello@contractscanner.net. See also our Privacy Policy and Terms of Service.