AI Writing Detection Score Estimator

Paste text and get an estimated AI-detection score based on the same signals GPTZero and Originality.ai use: burstiness (sentence length variation) and overused AI vocabulary patterns.

100% freeNo sign-upRuns in your browserNo upload · data stays private

📖 Read the full AI Writing Detection Score Estimator guide — how it works, examples & FAQ →

How to use this tool

  1. Paste your text.
  2. Read the AI probability score.
  3. Follow the tip to reduce the score if needed.

Example

"Delving into the nuanced landscape..." → AI probability: 87%

Why it's private

This tool runs entirely in your browser using JavaScript. Whatever you paste is processed on your own device — it is never uploaded to a server, logged, or stored. Built by Calabi, which also strips AI metadata and C2PA signals from images and video.

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