Free AI Content Detector

Honest probabilistic analysis of AI-generated text — with sentence-level highlighting, confidence scoring, and detailed writing metrics. No fake 99% certainty claims.

No account needed
Honest uncertainty
Key stays in your browser
Powered by Gemini 2.5 Flash
One-time setup required. This tool uses Google Gemini's free API. Your key is saved only in your browser — never sent to any server other than Google.
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Analysis is probabilistic. No AI detector achieves 100% accuracy. Results reflect linguistic patterns only — never use as sole judgment of authorship.

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Paste any text above and click Analyze to get started.