Best Free AI Content Detector
Get an honest estimate of whether text was AI-generated - with confidence and signals, not proof.
✦ 1 credit per use · 5 free a day
100% free
No signup
No watermark
Files processed in memory, never stored
✨
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How it works
- Paste the text. Drop in the passage you want to check.
- Analyze. You get a verdict, a confidence level and the signals behind it (queuing if busy).
- Read it as a hint. Treat the result as an estimate, not a definitive judgement.
About this tool
Paste a passage and get an honest estimate of whether it was likely written by AI, with a confidence level and a short note on the signals behind it. We’re deliberately upfront about the limits: no AI detector is reliable, they produce both false positives and false negatives, and a result here is an indication, not proof - never use it to accuse someone. It runs a language model on a GPU, so at busy times your request queues briefly and then runs. Nothing you paste is stored.
What people use it for
- Sanity-check whether a passage reads as AI-written
- Get a second opinion on suspicious text
- Understand which signals look AI-like
- Screen text before a closer human review
Frequently asked questions
Not very - and we won’t pretend otherwise. All AI detectors produce false positives and false negatives, especially on short, edited or non-native-English text. Treat the result as a weak signal, never as proof.
No. A result here is an estimate, not evidence, and acting on it to penalise someone would be unfair. Use it as one input to your own judgement, not a verdict.
A short verdict (likely human, mixed/unclear, or likely AI), a confidence level, and a sentence on the signals behind the estimate.
It runs a language model on a shared GPU. At busy times requests are served in order so none fail; you keep your place and the result appears when ready.
Up to about 6000 characters per run. Longer documents can be checked a section at a time.
No. It’s processed in memory to produce the estimate and is not kept on a server.
Yes - AI Content Detector is completely free, with no watermark on the output and no credit card required.
Yes. It runs in your browser, so AI Content Detector works on phones and tablets as well as desktop - there is no app to install.
No. AI Content Detector works with no signup at all; an optional free account only exists to unlock higher usage limits.
Usually just a few seconds for a typical file - AI Content Detector starts working the moment you give it your input.