AI Text Detector
See which passages of a text were probably written by AI.
Paste a text of at least 300 characters. An open-source language model measures how predictable each passage is — the core idea behind Fast-DetectGPT — and highlights the passages that look generated. Works in English, French and Arabic.
AI Text Detector
1 credit
The verdict you get
Never a bare percentage: each verdict comes with a short explanation and the limits of the method.
What we look at
Free plan · 10 credits a month · No credit card
Paste the text
At least 300 characters; longer texts give more reliable results.
Passage-by-passage scoring
Each block of 2–3 sentences gets its own score, so mixed texts are visible.
A verdict in three levels
Probably human, uncertain or probably AI — never a bare percentage — with a short explanation and the limits of the method.
When to use the AI Text Detector
A cover letter reads like a template
See which paragraphs look generated, passage by passage.
A teacher receives an unusually polished essay
Get an indication to start a conversation — never a sanction on its own.
A review or testimonial feels generic
Check whether the wording looks machine-written.
We name our methods because a verdict should be explainable.
In your result
A result is an indication, not proof. Detectors can be wrong, especially on compressed, edited or very short content. Only submit content you have the right to share. If you think a verdict is wrong, tell us from the result page.
Other detectors
See which passages of a text were probably written by AI.
Free plan: 10 credits every month. No credit card required.