ChatZero

Private by design

The private AI detector that runs in your browser

Review writing for strong AI-like patterns without creating an account or sending your text to a server.

100% privateText never leaves your device
FreeNo sign-up
Clear resultsSentence-level highlights
0 words · 0 characters

How it works

01

Paste or open

Add text directly, or open a .txt or .docx file locally.

02

Analyze privately

A browser-based classifier scores paragraph-sized passages.

03

Review highlights

See only the passages with strong AI-like signals.

Learn how scoring works

Built for careful decisions

Questions, answered honestly

Is my text stored?
How accurate is it?
Why was my human writing flagged?
Does it work on short text?
Can AI detectors be fooled?
Read all answers

Check your writing without sharing it

No account, no upload, and no claim that a probability is proof.