AI Text Detector
Paste any passage of text to estimate how likely it was generated by AI. You'll get a clear 0–100 score and sentence-level highlights showing where the AI signals are strongest.
It's free and works on any text — essays, messages, descriptions, or snippets. As with all AI detectors, treat the result as guidance rather than a definitive answer (how accurate are they?).
Sentence-level highlights
See the exact lines that read as AI.
Every major model
ChatGPT, Claude, Gemini — not just one.
Instant & free
No sign-up. Same text, same score.
Honest by design
A probability, never a false verdict.
Frequently asked questions
How does the AI text detector work?+
It analyzes statistical patterns in the text — predictability and variation across sentences — to estimate the probability that it was machine-generated.
What's the minimum text length?+
Short snippets are unreliable. Aim for at least 100 characters (roughly 15+ words); below that, scores are pulled toward the middle.
Is my text stored?+
Text is used only to produce your result and is not saved without consent. Avoid pasting sensitive personal information.
⚠️ Disclaimer: AI Killer results are probabilistic signals and are not 100% accurate. Detectors can flag human writing as AI, so do not use this as the sole basis for accusations of plagiarism, cheating, or academic misconduct.