Paste text. See how far it sits from the real human distribution for its register.
The exact same deterministic scorer as scripts/stylo.py — ported to JS and verified to match to 4 decimals. Runs entirely in your browser; nothing is uploaded.
Distance ≤ 0.75 ≈ comfortably inside the human band (a tunable editorial heuristic, not a detector score). An outlier is a hard flag — a feature sits >3 bands outside the human range. Defeating commercial AI detectors is an explicit non-goal.