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.
Why AI cover letters sound the same
Ask a model for a cover letter and it fills the gaps in your prompt with safe claims: passion, dedication, a perfect fit. Those claims can't be checked, so a reader skips them. What gets read is the one sentence with a project, a number or a tool in it.
| Habit | Typical line | What the rewrite does |
|---|---|---|
| Stock opener | "I am writing to express my strong interest in..." | Opens with your most concrete experience |
| Unbacked claims | "I thrive in fast-paced environments", "deep passion" | Cuts them unless the letter backs them with a fact |
| Rule of three | "seamless, intuitive, and user-centered" | Keeps the word that carries meaning |
| Not X, it's Y | "My approach is not just about looks, it's about solving problems." | Says what you did |
| Ideal-fit closing | "I am confident I would be an ideal fit for your team." | Ends on the last concrete point |
Press Cover letter under the box to load a sample and see each habit highlighted.
What the rewrite keeps
Your salutation, sign-off and name, the role, the company, every number and employer in the letter, and a formal first-person tone. It won't invent a project, a metric or a skill. The list under the rewrite asks for those instead: how many users, which tool, what changed after you shipped it.
Adding two of those details does more than any rewrite. A letter that names one result from your last job reads as yours.
Before you send
- Put the company's name and one thing you know about its product in the first paragraph. The tool can't know that.
- Check every number against your CV. Recruiters compare them.
- Read it aloud. Any sentence you wouldn't say in an interview, cut.
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 it pass an AI detector used by employers?
We don't test against detectors and we don't promise it. The rewrite removes the habits our own review flags. The details you add from the list matter more, because they are what no model could have written.
Is it fair to use AI for a cover letter?
Most employers care whether the letter is true and specific. Use the tool on your own draft and add your own facts. Don't let a rewrite claim experience you don't have.
Is my cover letter 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.
Can recruiters use this to screen applicants?
Please don't. On our test set the review marked 3 of 50 human texts as likely AI, one of them a job post. That error rate is too high for any decision about a person.
Updates
- : First release, with rewrite rules tuned for this kind of text.
More tools
- AI Humanizer: the general version, for any draft.
- Email Humanizer: rewrite an AI-drafted email, keeping greeting and sign-off.
- LinkedIn Post Humanizer: drop the hook-and-lesson template from a post.
- textGrain, explained: what OpenAI's invisible text watermark can and cannot prove.