Free · Sentence by sentence · Not stored by default
ChatGPT AI Detector
Your text is only sent when you press Scan and is not stored, unless you choose to share a report or tick the feedback box. Quick scans are unlimited; deep scans use your daily allowance.
What OpenAI says about ChatGPT text marks
OpenAI has built text watermarking tools but has not turned them on in ChatGPT, according to public reports. Detectors judge ChatGPT text by style, not by a hidden mark.
Status: Built but not switched on. Checked 12 October 2026. This changes as providers announce things; tell us if it is out of date.
How ChatGPT writing tends to read
ChatGPT output often shows upbeat, structured answers, stock openers and closers, and words like delve, tapestry and landscape. These habits are what the detector scores. Human writers share some of them, which is why a score is a signal and never proof.
ChatGPT detector questions
Can this detect ChatGPT text?+
It detects the style of machine-written text, which includes ChatGPT's typical habits: upbeat, structured answers, stock openers and closers, and words like delve, tapestry and landscape. OpenAI has built text watermarking tools but has not turned them on in ChatGPT, according to public reports. Detectors judge ChatGPT text by style, not by a hidden mark.
How does the ChatGPT detector work?+
It reads every sentence for the habits of chat-model writing: even rhythm, stock phrases, formal wording with few contractions, tidy lists of three and repeated openers. A deep scan adds a language-model review on top of the statistics.
How accurate is it?+
It gives a signal, not proof. Short text, translated text, heavily edited text and very formal human writing can be misread either way, so every result shows a confidence level. Never use one score to accuse someone of using AI.
Can it tell which AI model wrote the text?+
No. It estimates whether text reads as machine-written, not which company's model produced it. Model-specific marks, where they exist, need the provider's own key.
Is my text stored?+
Not by default. Text is only sent when you press Scan and is not stored, unless you choose to share a report (kept 30 days) or tick the box that shares it with us as feedback.
Why does it say low confidence?+
Under about 80 words there is too little to judge, and scores in the middle range are uncertain by nature. Paste more text, or read the highlighted sentences yourself.