AI text detector
AI text detector
Paste an essay, article or email. Run a free quick check on English text, or a Deep check for sentence-by-sentence evidence.
Free quick check · no sign-up
- — Scores shown exactly as the engine returns them
- — “Inconclusive” is a real answer, not an error
- — Credits come back automatically if a check fails
What the check looks at
Sentence scores
Each sentence gets the engine's human score, so you can see which parts read as generated instead of guessing from one number.
Hidden-character tricks
Zero-width characters and look-alike letters are flagged, because they are used to slip text past detectors.
Detected language
The report names the language the engine read, so you know whether the check ran on the text you meant.
Works best when
- The text has at least 300 words; 600 or more gives steadier scores.
- It is one person's original wording rather than a quote collection or a list.
- It is in a language the detector has been tested on (listed on every report).
How to read results
One scale, three honest answers.
The engine returns a human score from 0 to 100. We show that number unchanged, next to the engine version, and place it on a scale with a wide middle zone. When the evidence is mixed, we say so.
0–29 · Likely AI
Strong AI signals. Still look for drafts, sources or the original file before acting on it.
30–69 · Inconclusive
Mixed or weak signals, common with edited, translated or very short text. Not a verdict either way.
70–100 · Likely human
Few AI signals. Detectors can be fooled, so a high score is not a guarantee either.
Thresholds: mapping v1. Full method and known failure cases on the Methodology page.
Pay for checks, not features.
One credit system for everything. Sign up with a verified email and get 15 credits to try it.
- Image
- 3 credits
- Text
- 1 / 100 words
- Plans from
- $9.90/mo
Questions
Is the AI text detector free?
Yes, the quick check is free: English text of 150 to 1,500 words, 3 checks a day without an account and 10 a day when signed in. The Deep check, with sentence scores and more languages, uses credits: sign up with a verified email for 15 free credits, then 1 credit per 100 words.
Can it detect ChatGPT, Claude and Gemini?
The engine is built to flag text from widely used models, including those. It can still miss text that was heavily edited or paraphrased, and it can be wrong about human writing.
Do you keep my text?
Quick checks are not stored: we keep only a usage count. Deep check text is private to your account and deleted after 30 days, and you can delete a report at any time.