Is it AI or human?
Paste any text to see how likely it is to be AI-generated, with every suspicious sentence highlighted.
Sentence-level results
See exactly which sentences read as machine-written instead of a single opaque number.
Explains the score
Get the specific signals behind each result, plus burstiness and vocabulary stats.
Fix it in one click
Send flagged text straight to the humanizer and re-check in seconds.
Frequently asked questions
How does the AI detector work?+
It analyzes writing patterns that differ between people and language models: rhythm and sentence-length variation (burstiness), predictable word choice, stock phrases, repetitive structure and the presence of specific, personal detail. It returns an overall score plus a score for every sentence.
Which AI models can it detect?+
It's designed for text from ChatGPT (GPT-4 and newer), Claude, Gemini, Llama, Copilot, Jasper and similar tools.
How accurate is it?+
No AI detector is 100% accurate. Short texts, very formal writing and writing by non-native speakers are the hardest cases. Treat the score as a helpful signal, not proof.
Is the AI detector free?+
Yes. Guests get 5 free checks a day, and free accounts get 20 a day. Paid plans raise the limits and the length of text you can check.
What should I do if my text is flagged as AI?+
Look at the highlighted sentences, then use the HumanizeGo humanizer to rewrite them with a more natural rhythm and wording, and check again.