Free · Sentence by sentence · Not stored by default
Copilot 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 Microsoft says about Copilot text marks
We know of no published text watermark for Microsoft Copilot. Its output is judged by writing style.
Status: No published text mark. Checked 12 October 2026. This changes as providers announce things; tell us if it is out of date.
How Copilot writing tends to read
Copilot output often shows short, friendly answers with a summary line and a follow-up question. These habits are what the detector scores. Human writers share some of them, which is why a score is a signal and never proof.
Copilot detector questions
Can this detect Copilot text?+
It detects the style of machine-written text, which includes Copilot's typical habits: short, friendly answers with a summary line and a follow-up question. We know of no published text watermark for Microsoft Copilot. Its output is judged by writing style.
How does the Copilot 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.