Check pasted text
Paste anything from 50 to 15,000 words and get a score in seconds.
Free AI Detector
Check whether an essay, report or document was written by AI. Paste your text or upload a file. No sign up.
How to check if text is AI generated
- Paste your text, or upload a PDF, Word or text file.
- Select Check for AI. Long documents are checked one passage at a time.
- Read the overall score, then see which passages look human or AI-written.
What this AI checker does
Check PDF and Word documents
Upload a PDF, Word (.docx) or text file and it is checked straight away.
See passage-by-passage results
Every passage is marked likely human, mixed or likely AI, so you can see where the score comes from.
Free with no sign up
No account, no trial and no credit card.
A signal, not proof
AI detectors estimate how likely it is that text was generated by AI. They can be wrong in both directions, so use the result as one piece of evidence and always read the work yourself.
Questions about AI detection
Is this AI detector free?
Yes. It is free to use, with no sign up. You can run up to 20 checks every 10 minutes.
How accurate is this AI detector?
No AI detector is always right. It works best on English passages of a few hundred words and can make mistakes on short or very generic text. Treat the result as a signal, not proof.
Can it detect ChatGPT, Claude and Gemini?
It looks for patterns common to AI-generated writing rather than one specific chatbot. Very new AI models, or AI text that a person has heavily rewritten, can go undetected.
What does the AI likelihood percentage mean?
It is how strongly the detector believes the text is AI-generated, not the percentage of the text an AI wrote. A score under 35% is shown as likely human, 35% to 75% as mixed, and 75% or more as likely AI.
Can human writing be flagged as AI?
Yes. Short, formal or formulaic writing is flagged by mistake more often. Don't use this score alone to accuse anyone or to make decisions about someone's work.
Is my text saved?
No. Your text is sent securely to be scored, then discarded. We don't save it and don't use it for training. Uploaded files are read in your browser, so only their text is sent.
Which files can I upload?
PDF, Word (.docx), .txt and .md files up to 25 MB. Scanned PDFs have no readable text, so paste the text from those instead.
Which languages does it support?
English only. Results for other languages would not be reliable, so the detector declines them.
What is the word limit?
Between 50 and 15,000 words per check. Longer documents can be checked in parts.
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