AI Text Detector
Paste your text to check it for AI-writing patterns. This tool uses transparent, explainable heuristics — sentence burstiness, repetition, word patterns and typical AI phrases — and gives you a 0 to 100 likelihood score with a full per-signal breakdown.
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AI likelihood
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Signal breakdown (higher bar = more AI-like)
Important disclaimer: no AI detector is definitive — including this one. The score is based on stylistic heuristics only and is indicative, not proof. Short texts, translated writing, and formal non-native English can all score higher than expected. Do not use this result for grading, hiring, or disciplinary decisions.
How to use
- Paste the text you want to check into the box above (aim for at least 100 words).
- Click Analyze text to get the score and the per-signal breakdown.
- Read the signal bars to see exactly which patterns pushed the score up or down.
What the six signals measure
- Burstiness: human writing mixes short and long sentences; AI text is often uniformly paced.
- Repetition rate: repeated words and trigrams are more common in machine-generated prose.
- AI phrase markers: words like "delve", "moreover" and "in conclusion" appear disproportionately in AI drafts.
- Em-dash frequency: heavy em-dash use is a known stylistic fingerprint of current AI models.
- Word-length spread: the mix of short and long words is compared to a natural range.
- Common-word ratio: texts built almost entirely from the most common words look more machine-like.
Everything runs locally in your browser — your text is never uploaded or stored.