Paste text below to check if it was likely written by AI. 100% free, no signup required.
After you submit at least 30 words, the detector checks for selected phrases, sentence-length consistency, formal transitions, and contractions. It combines these signals into a score from 0% to 95% and labels the sample as likely human-written, possibly mixed or AI-assisted, or likely AI-generated.
This is a small, rule-based heuristic, not a machine-learning authorship test. Common phrases can appear in human writing, and generated text can avoid the patterns it checks. A score is only a prompt for further review.
The analysis runs in this page in your browser and does not send the pasted text to a detection API. Do not use the result alone to accuse someone, make academic or employment decisions, or determine whether a text is authentic. For consequential checks, seek context and independent evidence.
No. The result is an estimate based on limited text patterns and can produce false positives or false negatives.
The tool requires at least 30 words. Longer text gives its pattern checks more material, but does not guarantee accuracy.