Paste text, get an AI-tell score instantly, in your browser. Nothing is uploaded — this runs the exact lite perplexity + burstiness heuristic that untell's loop uses. It's an honest weak proxy, not a commercial detector — high score = reads machine-like, worth humanizing.
This is the zero-dependency lite tier — a deliberately weak demo signal. The real ensemble (RoBERTa, MAGE, Fast-DetectGPT, RADAR, Binoculars + commercial APIs) runs in the installed tool. No tool, including this one, is a ground-truth detector; detectors are noisy and falsely flag non-native English writers at high rates. Use as a signal, not a verdict.