Check Any Text for AI Patterns
Paste text below to score it across four statistical signals. Everything runs in your browser — no text leaves your device, no account required.
How the Signals Work
Frequently Asked Questions
Is this tool accurate?
It is a statistical heuristic, not a machine learning model. For production use or high-stakes decisions, use a dedicated detector from our benchmark — Originality.ai (91% accuracy) or GPTZero (87%) are the strongest options.
Does this send my text anywhere?
No. All computation runs entirely in your browser. No text is transmitted to any server. You can verify this in your browser network tab while running an analysis.
Why does humanized AI text score low?
AI humanizer tools specifically remove the patterns this detector measures. Even dedicated ML detectors struggle with humanized text — in our bypass study, accuracy dropped an average of 31 percentage points across all tested tools.
Why does _why's Guide score near 0%?
_why's writing has wildly variable sentence lengths (burstiness CV 0.94 vs AI average 0.31), zero formulaic transition phrases, and high vocabulary diversity (TTR 0.74 vs AI average 0.57). It is statistically the opposite of AI-generated text. Full analysis here.