See which AI tells your text carries — and how to fix them.

What this is — and isn't

Is: a fast, transparent stylometric scanner. It flags patterns that read machine-written — uniform sentence rhythm, AI-favoured phrasing, missing contractions, a too-predictable word stream — and shows you each one, with the measurement behind it.

Isn't: proof of anything. It has false positives on formal, non-native, and heavily edited human writing, and false negatives on lightly edited AI text. That's true of every text detector, whatever their landing pages claim — which is why every result here shows which signals fired, so a score can be understood and contested, not just believed. How to read the score →

How it works

ScanForAI runs the open-source aiscan engine. Tier 1 is a set of open stylometric heuristics (you can read the exact formulas). Tier 2 runs a small open language model (GPT-2) on our own hardware to measure how predictable your text is, token by token — machine text is eerily predictable. No third-party AI APIs are involved, and anonymous scans are never stored.

Prefer the terminal?

The scanner is an open HTTP API — pipe any file straight in:

curl -s --data-binary @draft.txt "https://scanforai.com/api/scan?format=text"

Full API docs →