Is your text flagged as AI?
Paste your text below for an instant AI-probability score with sentence-level highlighting. If it's flagged, humanize it in one click — your meaning intact.
5 free checks/day · up to 300 words each · sign in for the free-trial version or get a subscription for more & longer text.
● Detection engine last updated: October 6, 2026
How this AI detector works
This tool scores your text with a professional-grade detection engine — the same class of detector universities and publishers actually use. The percentage is the model's estimate that the text was AI-generated — it measures statistical patterns like predictability and sentence uniformity, not a banned-word list. A high score is not proof of anything, but it is what a grader's software will see. Learn the mechanics in how AI detectors actually work.
Flagged? Our AI humanizer restructures the sentence patterns detectors key on — not just swapping synonyms — and shows you a fresh score on every rewrite, plus a meaning check you can run yourself. The first 5 rewrites are free — no credit card needed.
Frequently asked questions
Is this AI detector really free?
Yes. 5 checks a day, up to 300 words each, no account and no card. Sign in and you get the free trial of the full app. A paid plan lifts the daily cap and takes longer text.
How accurate is this AI detector?
It runs a professional grade engine, the same class universities and publishers use. Treat the number as an estimate, not proof. It measures how predictable and how uniform your sentences are, so a high score tells you what a grader's software will probably see, not who wrote the text.
Which AI models can it detect?
Text from any of the big ones. ChatGPT, Claude, Gemini, DeepSeek, Llama and the rest. It keys on the statistical habits every large language model shares, not on one model's favourite words.
What should I do if my text is flagged?
Hit Fix it and the text moves straight into the rewriter, which rebuilds the sentence patterns detectors look for. Each rewrite comes back with a fresh score, so you can see whether it worked. There is also a meaning check you can run in ChatGPT or Claude to confirm your point survived. First 5 rewrites are free.
Is my text stored?
Not for long. To avoid checking the same text twice, the result, including the checked sentences, is kept for up to 48 hours and then deleted. After that we keep only the score and a fingerprint of the text, for 30 days. To score it, the text is sent to an outside detection service, which handles it under its own terms, so don't check confidential passages. The privacy policy has the details.