AI DETECTOR - Probably the best AI detector with free no sign-up access.

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An AI detector (also called AI checker) is a tool that analyzes text to determine whether it was written by a human or generated by artificial intelligence models like ChatGPT, Gemini, or Llama. Our detector uses three core linguistic metrics: perplexity (text predictability), burstiness (sentence length variability), and entropy (word choice randomness). Lower perplexity, low burstiness, and lower entropy typically indicate AI-generated content.

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We built the most accurate AI text detector because we believe you deserve to know the truth about what you're reading — no black boxes, no guesswork. What We Believe AI is transforming the world — but that transformation should happen with transparency, not secrecy. We believe: - Truth matters. You have the right to know whether what you're reading was written by a human or a machine. - Detection should be explainable. A score without context is useless. That's why we provide sentence-by-sentence analysis with clear reasoning. - Privacy is non-negotiable. Your text is transmitted encrypted and never stored permanently. - Education comes first. Teachers and students shouldn't have to pay hundreds of dollars to protect academic integrity.