No draft handy? Try a sample:
Highlights update as you type and stay in your browser. The two buttons send your text to an AI model for review, and we keep it for 30 days. You get 20 checks and 5 rewrites a day.
This tool measures writing patterns. It cannot tell who wrote a text, and its score should not be used to grade, hire or discipline anyone.
What gives an AI email away
Most AI emails fail the same way: three sentences of warm-up before the request, and a closing line that repeats it. People reading on a phone skip to the question, and if they have to hunt for it, the email reads as generated.
| Habit | Typical line | What the rewrite does |
|---|---|---|
| Filler opener | "I hope this email finds you well. I wanted to reach out regarding..." | Starts with the subject or the ask |
| Buried request | The question sits in the last paragraph | Moves it into the first two sentences |
| Stock words | crucial, robust, align, invaluable, shared vision | Uses the plain word or cuts it |
| Not X, it's Y | "The goal is not to rush, it's to make sure everyone is heard." | States what you want |
| Cheerful sign-off line | "Looking forward to hearing from you!" | Ends on the last concrete point, keeps your sign-off name |
Press Work email under the box to load a sample with all five habits and watch the highlights.
What the rewrite keeps
Your greeting line, your sign-off and name, every date, number and name in the text, and the point of view. It won't add a deadline, a meeting time or a reason you didn't give. Where a line would be stronger with one, the tool asks you for it instead: which report, which day, how long the call should be.
The rewrite usually comes out a little shorter. It is told to stay within 15% of your length, so it won't turn a long update into two lines.
Before you send
- Read the subject line on its own. The tool doesn't see it, and models write the same generic ones ("Quick question", "Following up").
- Check that the ask has a date or a size: "15 minutes Thursday" gets a faster yes than "find some time".
- Cut one paragraph. If the email still works, leave it out.
How it works
This page runs the same tool as the AI Humanizer. Yellow highlights come from rules in your browser and update as you type. Check sends the text to an AI review that flags whole sentences in red and gives a 0 to 100 score. Rewrite writes three versions, reviews each, keeps the best, and repeats once. The score measures writing habits. It cannot tell who wrote a text. How we tested it, and where it is wrong most, is on the main tool page.
FAQ
Will the person I email know it was written with AI?
We can't promise either way, and we don't test against detectors. The rewrite removes the habits our review flags, and the details you add from the list are what make it sound like you.
Does it keep my greeting and sign-off?
Yes. On this page the rewrite is told to keep the greeting and sign-off lines exactly as you wrote them and to change the body only.
Is my email stored?
Yes, for 30 days, when you press Check or Rewrite. The text goes to an AI model hosted on Tencent Cloud and we keep a copy for 30 days to fix mistakes. The highlights under the box never leave your browser. Don't paste anything confidential.
How many emails can I check?
20 checks and 5 rewrites a day, free, with no account. Each email can be 40 to 1,200 words.
Updates
- : First release, with rewrite rules tuned for this kind of text.
More tools
- AI Humanizer: the general version, for any draft.
- Cover Letter Humanizer: fix the generic lines in an AI cover letter.
- LinkedIn Post Humanizer: drop the hook-and-lesson template from a post.
- textGrain, explained: what OpenAI's invisible text watermark can and cannot prove.