GPTVerify
Free AI text detector with sentence level reasonsCheck whether a text was written by AI, with explanations
Highlights
What you can do with it
- A student checks a paper before submitting it
- A teacher reviews assignments for AI written sections
- A publisher screens submissions for generated text
How to use it
- 1 Paste the text you want to check into the tool, up to 25,000 characters.
- 2 Let the detector work through it sentence by sentence.
- 3 Read the confidence score for each sentence and the overall result.
- 4 Open the explanations for flagged sentences to see the reasoning.
Who it is for
Pros
- Explanations make results easier to judge
- Free and simple paste and check flow
- Catches AI rewritten text, not only raw generation
Limitations
- No detector is fully reliable, so treat the score as a prompt to read rather than a verdict
- Short texts under 300 words give weaker results
- Using a detector to accuse someone can have real consequences, so confirm before acting
What GPTVerify is
GPTVerify is a free tool for checking whether text was written by AI. It does not return a single number. Instead it classifies text as AI generated, AI rewritten, or human written, marks sentences individually, and gives an explanation for each marked sentence so you can see what drove the label. Each sentence also carries a confidence score, and those roll up into an overall result. The tool needs at least 50 characters and works better on texts of 300 words or more, with a limit of 25,000 characters per scan. It is aimed at students, educators, publishers, and professionals who need to check originality.
What you can do with it
- Check whether a draft contains AI generated passages
- Catch text that was human written then rewritten by AI
- See which sentences were flagged and why
- Get a per sentence confidence score plus an overall result
Who it is for
- Students checking their own work before submitting
- Teachers and educators reviewing assignments
- Publishers and editors screening submitted content
What to watch out for
No detector is fully reliable. Human writing can look machine generated and machine writing can look human, so treat the output as a reason to read closely rather than a verdict you can act on. Short texts under 300 words produce weaker results, and the site says as much. Using a detector to accuse a student or a writer carries real consequences, so confirm with a conversation before acting on a score. And the 25,000 character limit means long documents need to be checked in pieces, which can hide context that changes the picture.
FAQ
What does it detect?
Text that is AI generated, AI rewritten, or human written, with sentence level classification and explanations.
How long can the text be?
Up to 25,000 characters per scan, with a minimum of 50 characters. The site recommends at least 300 words for better accuracy.
Can I rely on the result?
No detector is fully reliable. Use the score and explanations as a reason to read closely, not as a final verdict.
Why it is free
What the official page says： 免费
Free limits, trial length and features are decided by the official site and can change at any time.
Product preview
Screenshot archived from the listing page, for preview only.
