ChatGPT Detector
Check whether text was written by ChatGPT, with a per-sentence breakdown of the signals behind every flag. Free, no sign-up.
The markers are consistent: unusually even sentence lengths, high word predictability, a small stock of connective phrases, abstract nouns where a concrete detail belongs, and repeated sentence openers. Each flagged sentence names which of these fired.
A warning about the whole category: no ChatGPT detector is reliable enough to accuse anyone on. Detectors disagree with each other constantly and misfire most often on writing by non-native English speakers. Use the output to improve prose, never as proof.
FAQ
We look for the statistical shape models produce in general rather than a version-specific fingerprint, which ages far better than a model-specific classifier.
Then the signal genuinely weakens, because the text really has changed. That is the honest answer, and it is also why detection is unreliable in the first place.
Yes. No account needed. The sentence-level analysis runs in your browser with no limit, and signed-out visitors also get one free detector check a day.
The writing analysis and your Style DNA run in your browser. For a real AI score, the text you check is sent to an AI-detection provider, and we never store it. When you rewrite on a paid plan, the draft is sent to our server, rewritten and sent back without being stored. AI features (rewriting, humanizing and Copilot) send the text to Cloudflare Workers AI, which processes it and doesn't keep it.
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