Free Tool
AI Detector
Paste any text and get an instant AI probability score. No sign-up, no cost, no data sent to servers. Then see why this approach has fundamental limits — and what actual proof of authorship looks like.
Frequently Asked Questions
How accurate is this AI detector?+
This tool uses basic text heuristics — sentence uniformity, vocabulary diversity, known AI phrases. Like all AI detectors, it produces probability estimates, not proof. It can flag human writing as AI and miss AI writing entirely. No text-based detector is reliable enough for high-stakes decisions.
Can AI detectors prove who wrote something?+
No. AI detectors analyze the finished text and estimate probability. They cannot determine who wrote something or how it was written. For proof of human authorship, you need process-based verification that captures behavioral signals during writing.
What is better than an AI detector?+
Behavioral certification captures how writing happens — keystroke timing, revision patterns, pause behavior — then issues a signed certificate with a public verification page. This provides evidence rather than a probability score. Learn how it works.
Is this AI detector free?+
Yes. Completely free with no sign-up required. The tool runs entirely in your browser — your text is never sent to any server.
Is my text stored or sent anywhere?+
No. All analysis happens in your browser using JavaScript. Your text never leaves your device. We have no server-side component for this tool.