AI Rewriter
Rewrite text to be clearer, more formal, friendlier, more persuasive, or simpler.
Before you use this: These AI tools run on a free Cloudflare allowance, so they are limited to 5 requests per person per day. Every other tool on this site is unlimited — the difference is that those run entirely on your device, while this one needs a server.
Result
How to use this tool
- Select your file, drag it onto the box above.
- Processing starts automatically — there is nothing to configure.
- Check the result panel, which shows the original size, the final size and the page count.
- Click Download to save it.
Where the paraphraser keeps the same shape and changes the words, the rewriter is free to restructure — splitting sentences, reordering, cutting padding — while keeping every fact intact.
AI Rewriter — the specification
| Input | Up to 6,000 characters |
|---|---|
| Styles | Concise, formal, friendly, persuasive, simple |
| Limit | 5 per day per person |
| Rule | Facts preserved; structure may change |
How it works
This is the one part of the site that needs a server. A language model cannot run in a browser at usable speed, so your text is sent to a small Cloudflare Worker, processed at the edge, and returned. The file — where there is one — never leaves your device; only text does.
How it is kept safe and free: there is no API key anywhere, because Cloudflare's AI is bound directly to the Worker rather than authenticated with a token that could be stolen from the page. The prompts live on the server, not in your browser, so the endpoint cannot be repurposed as somebody's free chatbot. An invisible human check and a per-person daily cap keep the shared free allowance available to actual visitors.
Nothing you send is stored, logged, or used for training.
What this page sends, and what the model is told
Every other tool on this site publishes a measured run, because every other tool runs on your device and anyone can reproduce the numbers. This one sends text to a server, and a language model does not give the same answer twice — so printing one response here and calling it a measurement would be dishonest. What can be published exactly is the contract: what leaves your browser, and what the model is told to do with it.
Step one: exactly what is sent
One HTTPS POST, with this body and nothing else. No file, no cookie, no account, no identifier for you:
{
"task": "rewrite",
"text": "<the text you typed>",
"tone": "formal",
"turnstile": "<one-time human-check token>"
}
Note what is not in there: the prompt. The browser sends a task name, never an instruction. That is what stops the endpoint being repurposed as somebody else’s free chatbot, and it is why there is no API key anywhere in this page’s source for you to find.
Step two: exactly what the model is told
The server holds the prompt. This is it, verbatim, for this page:
You rewrite text to a requested style while keeping every fact intact. Return only the rewritten text, with no commentary.
And the message your text is wrapped in:
Rewrite this to be formal: <the text you typed>
The limits, as the server enforces them
| Model | @cf/meta/llama-4-scout-17b-16e-instruct, on Cloudflare Workers AI |
|---|---|
| Longest text accepted | 6,000 characters — longer is refused, not silently truncated |
| Longest reply generated | 600 tokens |
| Per person, per day | 5 requests, resetting at midnight UTC |
| Whole site, per day | 280 requests, after which the tool stops rather than starts costing money |
| Accepted from | https://onlineaitool.com and https://www.onlineaitool.com only |
Why you should still read the output. The prompt above tells the model not to invent facts, and that instruction helps. It is not a guarantee. Treat what comes back as a draft to check against what you actually know — particularly for anything with a date, a figure or a name in it.
Who needs AI Rewriter
Turning a rambling email into three clear sentences, softening a blunt message, or making dense writing readable.
AI Rewriter — frequently asked questions
What is the difference from the paraphraser?
The paraphraser swaps wording and keeps the structure. The rewriter can restructure — splitting long sentences, reordering points, removing padding. Use the rewriter when the writing itself needs work, not just the vocabulary.
Can I check the result?
Run it through the readability checker on this site — it is free, unlimited, and shows whether the rewrite genuinely got simpler.
Is my text sent to a server?
Yes — and this is the one part of the site where that is true. AI needs a model that cannot run in a browser, so your text goes to a Cloudflare Worker, is processed, and comes straight back. It is not stored, not logged, and not used for training. If that matters for your document, use the tools that run fully on your device instead.
Why only 5 uses a day?
The AI runs on Cloudflare's free tier, which gives the whole site a fixed daily allowance. Without a per-person cap, one script could drain it before breakfast and nobody else would get to use it. The limit resets at midnight UTC.
Can I trust the output?
Read it before you use it. Language models produce fluent text that can still be wrong, and they occasionally invent detail. The prompts here explicitly instruct the model not to add facts you did not provide, but treat every result as a first draft to check, not a finished document.
Is this tool really free?
Yes. No account, no trial period, no watermark on the output and no cap on how many times you use it. The site is funded by advertising.
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Background reading: Text and Developer Tools That Never Upload Your Data
Your file never leaves your device. Open your browser's Network tab while you use this page and you will see no upload — how that works.
Disclaimer. AI output is a draft, not a fact-check. Read it before you use it, and never let it invent an employer, a qualification or a number you cannot stand behind. Full disclaimer.