Free AI Detector
Detect AI-generated text free with statistical analysis: burstiness, vocabulary diversity, AI-phrase fingerprints & more. Confidence score with full breakdown.
Our AI detector uses the same class of statistical signals as commercial detectors: burstiness (humans vary sentence length, AI doesn't), vocabulary diversity, repeated phrasing patterns, AI-fingerprint phrases, contraction usage, and sentence-opener variety.
Each signal is analysed independently and shown in the results, so you can see exactly why text scored the way it did — not just a black-box number.
For reliable results paste at least 80 words; 200+ words gives high confidence. Very short texts don't contain enough signal for any detector to judge accurately.
Frequently Asked Questions
How accurate is the AI detector?
It analyses six independent statistical signals and reports a confidence level based on text length. Like all AI detectors, results are probabilistic — use them as guidance, not proof.
What does burstiness mean?
Burstiness measures sentence-length variation. Human writing mixes short and long sentences; AI writing tends to keep them uniform. Low burstiness is a strong AI signal.
How can I make AI text undetectable?
Use our free AI Humanizer — it removes the exact patterns this detector measures.