Private by design — your text never leaves your browser

We measure AI writing tells, including our own.

Fifteen rules, checked against 959 documents written before ChatGPT existed. One of them cleared. Paste a draft and you get every flag with the rate behind it, so you know what it is worth. Free, no signup, and your text never leaves your browser.

A reader sees this

"In today's fast-paced digital landscape, our team is thrilled to leverage cutting-edge solutions…"

2 tells in 13 words your reader noticed both — the highlights are the giveaways
See how it works ↓

Read the study: 14 of our 15 rules did not survive it

Here's what happens when you paste

No account, no upload, nothing to install. Three steps, all on your own computer.

Paste anything you're about to send

An email, a post, a memo. It stays on your screen — the check runs in your browser, not on a server.

The robot bits light up

Each highlight is a tell — a word or habit readers recognize as AI. Hover one to see why, with the research behind it.

Swap in plainer words

One click per fix. Word swaps only — the structure, meaning, and voice stay yours.

New here? What's a "tell"?

A tell is a word or writing habit that AI uses far more often than people do — so often that readers have learned to spot it. You don't need to know how AI works to fix them; you just need to know which ones you're sending.

All the tells, defined and measured ›
Why does AI writing sound like AI? ›

Rising this week "not just X, but Y" ▲ in ~6% of sampled ChatGPT messages This week in AI writing ›