AI Detector for Teachers
A free AI detector built around what teachers actually need: which sentences look machine-written, and why, not a verdict.
Detection scores are not evidence. They vary between tools, they misfire on non-native English writers, and no vendor will stand behind one in an academic-integrity hearing. What a heatmap gives you instead is something concrete to discuss: these four sentences read as machine-written, and here is the specific reason each one does.
That reframing is more useful pedagogically too. A student who can see that their writing has flat rhythm and no concrete detail has been given a writing lesson. A student handed a percentage has been given an accusation.
FAQ
No. Please do not use any detector that way, including the expensive ones. Institutions that have tried are losing those cases.
Process: drafts, version history, notes, and a conversation about the work. Detection output can start that conversation but cannot conclude it.
Because their prose tends to be more even in rhythm and to use a narrower, more common vocabulary, which is exactly what these systems measure. It is a documented and unresolved bias in the whole category.
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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