The best AI rewriter is the one that fits the job: a quick tone change on an email, careful paraphrasing of a source for an essay, or a full document. This comparison puts five free AI rewriter tools side by side, QuillBot, Grammarly, Scribbr, Ahrefs and our own just AI it, using only what each tool says on its own public pages.
A note on fairness: we make just AI it. That is why we didn't score or rank output quality, and why our tool is listed last with its gaps stated. Every fact about another tool links to the page it came from, and we checked those pages on October 27, 2026. If a page didn't state something, the table says so instead of guessing.
How we compared these AI rewriter tools
- We read each tool's public product page, and QuillBot's help center for its free limit, on October 27, 2026.
- We compared four things a free user hits first: how much text one run takes, which modes or tones are free, whether you need an account, and which languages the page lists.
- We left out prices, because plans change often, and star ratings, because we did not run a review study.
- We did not run the other tools on test text or judge their output. The before and after examples on this page come from our own tool, run on October 27, 2026.
Best AI rewriter comparison table
From each tool's own page, checked October 27, 2026. Sources are listed at the end of this page.
| Tool | Free input per run | Modes or tones | Account | Languages |
|---|---|---|---|---|
| QuillBot Paraphraser | Up to 100 words at a time (help center, updated October 22, 2026) | Free: Standard and Fluency. Premium adds all 9 modes and unlimited Custom modes | Page title says "No Sign-up Required" | Page says 20+ languages |
| Grammarly Paraphraser | Not stated on the page | Six preset styles plus a custom voice | Page title says "No Sign-up"; the page says multilingual paraphrasing needs a free Grammarly account | English, Spanish, French, German, Portuguese and Italian |
| Scribbr Paraphrasing Tool | Up to 125 words per input | Standard and Fluency | No signup, per the page | Page says it works for texts in different languages |
| Ahrefs Paragraph Rewriter | The input counter on the page shows 2,048 | Tone selector, Formal shown by default; variants option | Not stated on the page | Language selector shows English by default; full list not stated on the page |
| just AI it (this site) | Up to 2,000 characters per rewrite, 25 rewrites a day, up to 5 a minute | Six everyday tones (Professional, Friendlier, Shorter, Clearer, More confident, Polite) and seven fun styles | No signup | Everyday tones are told to reply in the language you write in; fun styles are in English |
The AI rewriter tools, one by one
QuillBot Paraphraser
An AI paraphrasing tool with a Synonym Slider, a click-to-see thesaurus and document upload. QuillBot's page describes it as working "like a full-sentence thesaurus" and lists 10+ modes, including Fluency, Simple, Shorten, Humanize and Custom.
A good fit if
- You want to control how much of the vocabulary changes, using the Synonym Slider.
- You want to upload a document or pick individual synonyms word by word.
- You may want Premium later for more modes and no word limit.
Keep in mind
- The free version is limited to 100 words per paraphrase and two modes, according to QuillBot's help center.
- The paraphraser page also states the free version has "limited usage".
Source: QuillBot, Paraphrasing Tool page; QuillBot Help Center, "What is the difference between free and Premium in the Quillbot Paraphraser?" (updated October 22, 2026), checked October 27, 2026.
Grammarly Paraphraser
A paraphrasing agent inside Grammarly. The page lists six preset writing styles, a custom voice you can describe, and paraphrasing in six languages. It sits alongside Grammarly's other agents, such as citation finding and reader reactions.
A good fit if
- You already use Grammarly and want paraphrasing in the same place.
- You want a custom voice that the page says is applied to future rewrites.
- You write in one of the six listed languages.
Keep in mind
- The page does not state a free input limit, so check it in the tool.
- Some features on the page are described as part of signing up for Grammarly.
Source: Grammarly, Free Paraphrasing Tool page, checked October 27, 2026.
Scribbr Paraphrasing Tool
A free paraphraser aimed at academic writing. Scribbr's page says it is powered by QuillBot, is ad-free, needs no signup and offers Standard and Fluency modes, with an interactive thesaurus and document upload.
A good fit if
- You are a student paraphrasing sources and want the citation and plagiarism guidance on the same site.
- You want an ad-free tool with no account.
- You want to upload a Word document, Google Doc or PDF.
Keep in mind
- Each input is limited to 125 words.
- It is powered by QuillBot, so it shares the same underlying service as QuillBot's paraphraser, per Scribbr's page.
Source: Scribbr, Free AI Paraphrasing Tool page, checked October 27, 2026.
Ahrefs Paragraph Rewriter
A free paragraph rewriter in Ahrefs' set of writing tools. The tool on the page has a tone selector (Formal is shown by default), an Edit structure option and a variants option (1 variant is shown by default).
A good fit if
- You want to rewrite one paragraph with a set tone.
- You want more than one variant to choose from.
- You already use Ahrefs' other free writing tools.
Keep in mind
- The page does not list the full set of tones or languages, so check them in the tool.
- The page describes it as a paragraph tool.
Source: Ahrefs, Free AI Paragraph Rewriter page, checked October 27, 2026.
just AI it (this site)
Our own free rewriter. One box, one button: paste text, pick a tone and get one rewritten version back. It is a tone rewriter rather than a synonym-by-synonym paraphraser.
A good fit if
- You want a quick tone change on a message, email or paragraph without an account.
- You want to compare the same text in several tones.
Keep in mind
- There is no synonym slider, thesaurus, document upload or citation tool.
- It returns one version per run, and the daily count resets at midnight UTC.
Source: this site's own limits, the same ones shown on every tool page.
Which AI rewriter is best for your task
- Fine control over word changes: QuillBot, for its Synonym Slider and click-to-see synonyms.
- Paraphrasing sources for an essay: Scribbr or QuillBot, both with document upload, or Grammarly if you also want its citation finder. Cite every source either way.
- Writing in Spanish, French, German, Portuguese or Italian: Grammarly lists all five plus English; QuillBot lists 20+ languages. just AI it's everyday tones are told to reply in the language you write in.
- One paragraph with a set tone and a variants option: the Ahrefs Paragraph Rewriter.
- A quick tone change with no account: just AI it, up to 2,000 characters per rewrite. For your own writing, try the rewording tool or the essay rewriter.
What just AI it returns: one message, three tones
Real output from our own tool, run on October 27, 2026 and copied as it came back. We did not run these through the other tools.
hi, just checking if you had a chance to look at my proposal, i sent it last tuesday and havent heard back
Hello, I’m following up to see whether you’ve had a chance to review my proposal, which I sent last Tuesday. I’d appreciate an update when you have a moment.
hi, just checking if you had a chance to look at my proposal, i sent it last tuesday and havent heard back
Hi, I just wanted to check whether you’ve had a chance to look over my proposal. I sent it last Tuesday and would love to hear your thoughts when you have a moment.
hi, just checking if you had a chance to look at my proposal, i sent it last tuesday and havent heard back
Hi, have you had a chance to review my proposal? I sent it last Tuesday and haven’t heard back.
What to check in any free AI rewriter
- Does it keep your facts? Check every number, date and name in the result.
- What is the free limit per run, and is it counted in words or characters? 100 words is roughly a short paragraph; 2,000 characters is a few paragraphs.
- Do you need an account, and what happens to the text you paste? Read the privacy policy of any tool before you paste private details.
- Does it support your language and the tone you need?
- Does it claim to hide AI use? Be wary of that. A rewriter should help you say what you mean, not disguise where text came from.
Best AI rewriter FAQ
What is the best AI rewriter?
There isn't one best AI rewriter for everyone. QuillBot has a Synonym Slider for how much the wording changes. Grammarly fits people who already write in Grammarly, Scribbr suits students paraphrasing sources, Ahrefs rewrites one paragraph with a set tone, and just AI it is built for quick tone changes without an account. Pick by the job, then try it on your own text.
What is the best free AI rewriter?
It depends on the limit that matters to you. Per their own pages on October 27, 2026, QuillBot's free paraphraser takes up to 100 words at a time and Scribbr's takes up to 125 words per input. The Ahrefs input counter shows 2,048. just AI it takes up to 2,000 characters per rewrite, 25 rewrites a day. Grammarly's page does not state a free input limit.
Did you test the output quality of every tool?
No. This page compares facts each tool states on its own public pages, such as limits, modes, signup and languages, and links to them. Output quality depends on your text, so we did not rank it. The example outputs on this page come from our own tool only.
Why isn't just AI it ranked first?
We make just AI it, so ranking ourselves first would not be a fair comparison. It is listed last with its limits stated plainly, including what it doesn't have, such as a thesaurus, document upload or citation tools.
Is using an AI rewriter cheating?
Not by itself, but rules differ. Many schools and employers allow editing help and some ban AI tools for certain work. Rewrite your own writing, cite any source you paraphrase, and check the policy that applies to you.
What is the difference between an AI rewriter and a paraphrasing tool?
They overlap. A paraphrasing tool restates an idea in new words. A tone rewriter changes how the text sounds and is told to keep the facts. Try one on the just AI it home page.
How often is this comparison updated?
The facts were checked on October 27, 2026. Tools change their limits and plans often, so check each tool's own page, linked in the sources, before you rely on a number.
Sources
All pages checked on October 27, 2026. Product names belong to their owners. This page is not affiliated with or endorsed by any of them.
- QuillBot, Paraphrasing Tool page, https://quillbot.com/paraphrasing-tool
- QuillBot Help Center, "What is the difference between free and Premium in the Quillbot Paraphraser?" (updated October 22, 2026), https://help.quillbot.com/hc/en-us/articles/35855733045143-What-is-the-difference-between-free-and-Premium-in-the-QuillBot-Paraphraser
- Grammarly, Free Paraphrasing Tool page, https://www.grammarly.com/paraphrasing-tool
- Scribbr, Free AI Paraphrasing Tool page, https://www.scribbr.com/paraphrasing-tool/
- Ahrefs, Free AI Paragraph Rewriter page, https://ahrefs.com/writing-tools/paragraph-rewriter
Related tools
- Try the free AI rewriter on our home page, six tones and no signup.
- The rewording tool rewords a sentence or a short email in one tap.
- The paragraph rewriter puts the main point of a long block first.
- The essay rewriter works one essay paragraph at a time and keeps your argument.
- The sentence rewriter fixes one clunky line.