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AI Paraphrasing Tool

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Let’s rewrite!

Start typing, paste your text, or upload a Word, PDF or text file. Select any word to freeze it.

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Your paraphrase will appear herePick a mode, add your text, then press Paraphrase. Click any word in the result for synonyms.
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Free AI Paraphrasing Tool

Free AI paraphrasing tool

What the AI Paraphrasing Tool by AI Writing Assistant does

This is the AI paraphraser in the toolkit: paste a passage, choose how far you want it moved, and get it back saying the same thing in different words. An AI powered paraphrasing tool is only as good as its judgement about what to leave alone, so this one holds names, numbers, dates and links steady while it rebuilds the sentences around them. Nine modes, a synonyms slider and a freeze control decide how much actually changes.

How the AI paraphrasing tool works

Three steps, and the third one is where the work actually happens.

1

Paste the passage

Type it, paste it, or upload a PDF, DOCX, TXT or Markdown file. There is no sign-up and nothing to install.

2

Choose a mode and how far to go

Nine modes set the register — Standard, Fluency, Formal, Academic, Simple, Creative, Shorten, Expand or a Custom instruction you write yourself. The synonyms slider decides whether the AI rewrite is light, balanced or extensive.

3

Check what changed, then keep or redo it

Every changed word is highlighted, so you can see at a glance what moved and what did not. Click any word for alternatives, freeze the ones that must stay, edit the result in place, or step back to an earlier version.

What this AI rewriter does that most do not

Names and numbers stay put

Protect names & numbers is on by default, so a figure like 3.4 kg, a date, a citation or an organisation never quietly becomes something else. This is the single most common way a rewritten passage goes wrong.

You can see exactly what moved

Changed words are highlighted against the original. Nothing else in this category shows you the diff, and it is the fastest way to catch a rewrite that went further than you wanted.

Freeze the words that must not change

Click a term — a defined phrase, a product name, a piece of jargon with no synonym — and freeze it. It survives every subsequent run.

Three degrees of change

Light keeps close to your wording. Balanced restructures sentences. Extensive rebuilds them. The slider is the honest version of “how different do you need this to be?”

It works on a sentence or a paragraph

Use the AI sentence rewriter on one awkward line, or run several paragraphs through at once. The controls are the same either way.

Sixty-four languages

Rewrite in the language you wrote in, or pick another. Across 73 regional variants, so British and American English are handled as the different registers they are.

See what the AI rewrite actually changed

The result comes back with every altered word highlighted against your original, so a paraphrase is something you can check rather than something you have to trust.

  • Highlighted words are the ones that moved. Everything unhighlighted is exactly as you wrote it.
  • In this run the year, the organisation, 3.4 kg and 12 weeks are all untouched — that is Protect names & numbers doing its job.
  • Click any highlighted word to swap it for another option, or freeze it so it stops changing.
  • Switch to Original at any time to compare the two side by side.
The AI paraphrasing tool showing a rewritten research passage with every changed word highlighted, while the year, the organisation name, 3.4 kg and 12 weeks remain unchanged.
A real run, unedited, in Standard mode at Balanced.

Nine modes and a slider, not one button

“Rewrite this” is not one instruction. Making a sentence plainer and making it more formal are opposite jobs, so they are separate modes.

  • Six modes are free: Standard, Fluency, Formal, Simple, Shorten and Expand.
  • Academic, Creative and Custom are part of Pro, along with the Extensive synonyms level.
  • Custom takes an instruction in your own words — “keep it under 40 words and lose the jargon”.
  • Protect names & numbers sits under the slider and is on unless you turn it off.
The mode menu of the AI paraphrasing tool listing Standard, Fluency, Formal, Academic, Simple, Creative, Shorten and Expand, with the synonyms slider and the Protect names and numbers switch below it.
The mode sheet, with the synonyms slider and protection switch.

One passage, one paraphrase

Standard mode at Balanced, unedited. The source is a made-up summary of a research finding, chosen because it is full of the things a careless rewrite breaks.

Your text

A 2024 review by the Cochrane Collaboration found that intermittent fasting produced a mean weight loss of 3.4 kg over 12 weeks, but the authors noted that the evidence base was small and the results may not hold in larger populations. Adherence, rather than the fasting protocol itself, appeared to be the strongest predictor of outcome.

Paraphrased

A 2024 Cochrane Collaboration review reported that intermittent fasting led to an average weight loss of 3.4 kg after 12 weeks, though the authors cautioned that the evidence pool was limited and the findings might not apply to larger groups. Compliance, rather than the specific fasting regimen, seemed to be the most significant factor influencing results.

The sentences were rebuilt — clause order changed, “produced” became “led to”, “Adherence” became “Compliance” — while 2024, Cochrane Collaboration, 3.4 kg and 12 weeks came through untouched. The hedges survived too: may not hold became might not apply, which is the same strength of claim.

Nine ways to say the same thing

The mode is not decoration. Simple and Formal pull in opposite directions, and picking the wrong one is why a rewrite can come back worse than what you started with. Six are free; three are part of Pro.

Standard

Natural rewrite at the same level of formality. The default, and the right answer most of the time.

Fluency

Smoother, more natural, error-free wording. The mode for a second-language draft that says the right thing awkwardly.

Formal

Polished and professional. Contractions go, hedges firm up, the register lifts.

Academic Pro

Precise, objective, scholarly. Built for a literature review rather than a blog post.

Simple

Plain words and shorter sentences. The one to reach for when the original is jargon.

Creative Pro

Fresh vocabulary and varied structure. The furthest from your original wording.

Shorten

Say the same thing in fewer words, without dropping a fact.

Expand

Fuller sentences, no new facts. It elaborates what is there; it does not invent.

Custom Pro

Describe the style you want in your own words and it follows the instruction.

Rewriting your own words is not the same as rewriting someone else’s

Almost every page about paraphrasing blurs these two, then answers questions about the second while saying “your text”. The rules are completely different, so it is worth being clear which one you are doing.

Your own draft

No citation, no integrity question, no one to credit. Use any mode as freely as you like — this is editing, and rewriting your own sentence until it reads properly is just writing.

The only two risks are meaning drift and losing your voice, and both are visible in the highlighted diff. If you are working in a second language, rewriting your own draft into clearer English raises no integrity question at all — the ideas were always yours.

Someone else’s text

You still cite it. The citation is for the idea, not the wording, so it is required even if you changed every single word. This is the rule people most often get wrong, and it is why “I paraphrased it” is not a defence.

The structure has to genuinely change, not just the vocabulary. And where the exact wording is the point — a definition, a legal phrase, a line someone will be held to — quote it instead.

Patchwriting, and how much change is enough

There is a name for a rewrite that swaps synonyms into somebody else’s sentence frame. Universities teach it. No other tool in this category mentions it.

  • PatchwritingKeeping the original author’s sentence structure and order of ideas while replacing individual words. It is what a lazy paraphrase produces, and most institutions treat it as plagiarism even when every word has been changed.
  • What a real paraphrase changesThe sentence structure and the order in which the ideas arrive — not just the vocabulary. If you can lay your version over the original and the clauses still line up one for one, you have patchwritten it.
  • Sharing some wording is fineSome words have no acceptable synonym. Photosynthesis, myocardial infarction, the defendant, net operating loss — keeping them is correct, not lazy. More changed words is not a better paraphrase.
  • Paraphrase, summarise or quote?Quote when the exact wording is the point. Paraphrase when the idea matters and the wording does not. Summarise when only the gist is needed. All three need a citation.
  • Rewriting to get past a checkerRewording text specifically so a similarity report will not flag it is a separate offence from the copying itself. Being undetected is not the same as being honest, and this is not what the tool is for.

The failure mode nobody warns you about

A rewrite rarely breaks a passage loudly. It shifts the strength of a claim by one notch and reads perfectly well afterwards.

Balanced

Compliance, rather than the specific fasting regimen, seemed to be the most significant factor influencing results.

Extensive

Compliance, rather than the specific fasting regimen, emerged as the most significant factor influencing results.

Two real runs of the same sentence. Seemed to be reports an impression; emerged as reports a finding. In a summary of research that is a different claim, and it is the kind of thing that survives proofreading because nothing is misspelled. Read the hedges — may, appeared, suggests, tends to — before you accept any paraphrase of a source.

Can you use an AI article rewriter to republish someone else’s article?

It is the most searched thing in this category and the least honestly answered, so here is the plain version.

Technically, yes

An AI article rewriter will reword a competitor’s post into something a duplicate-content check will not flag. That part works, and every tool selling “plagiarism-free output” is describing this.

It is still their article

The reporting, the research and the ideas did not change hands because the sentences did. Search engines have been ranking on originality rather than word-level uniqueness for years, and rewritten copy has nothing new to offer.

What actually works

Use it on your own drafts: a version that reads better, a section shortened, a technical passage made plain. That is the job this AI text rewriter is built for, and it is the one with an outcome.

A student writing at a library table with open textbooks and a laptop.

Text you should leave exactly as it is

  • Direct quotations. If it is inside quotation marks it has to match the source word for word. Paraphrasing a quote and leaving the marks on is a misquotation.
  • Legal and contractual wording. Statutes, clauses, terms and consent language mean what they say because of the words chosen. A smoother version is a different document.
  • Definitions and dosing instructions. Anything where being approximately right is the same as being wrong.
  • Somebody’s own account. Testimony, a personal statement, an interview answer. Rewriting how a person described their own experience takes it away from them.

If you need the passage in your work and it belongs on this list, quote it and cite it. That is the correct move, not a fallback.

Who the AI paraphraser is for

Students and researchers

Bring a source into your own words for a literature review, then cite it. The highlighted diff makes it easy to check you have restructured rather than reworded.

A student writing at a library table with open textbooks and a laptop.

Professionals

Make a technical paragraph plain for a client, tighten a report that runs long, or lift the register of something written in a hurry.

A professional at an office desk on a call, reviewing printed documents beside two monitors.

Second-language writers

Say what you meant to say. Rewriting your own English draft into clearer English is editing, and it raises no integrity question at all — the ideas were always yours.

Someone reading a message on a phone while sitting on a sofa at home.

“Rewrite my sentence” — when one line will not come out right

Sometimes the problem is not the tool. Here is what to try before you reach for synonyms.

Split it

A sentence that resists rewriting is usually two sentences wearing one coat. Break it at the comma and both halves get easier.

Find the verb

If the action is hidden in a noun — carried out an assessment of — put it back in the verb: assessed. Most awkward sentences are one nominalisation away from fine.

Say it out loud

Then type what you said. Typing rewrite my sentence AI into a search box usually means one specific line is stuck — and when the result still sounds off, the structure is the problem, not the vocabulary.

Then run Simple

Of the nine modes, Simple is the one that reliably rescues a tangled line, because it shortens and unpacks rather than decorating.

Frequently asked questions

Is using an AI paraphrasing tool considered cheating?

Using one to rewrite your own draft is editing, and no institution objects to that. Using one on someone else’s work without citing them is plagiarism — exactly as it would be if you had reworded it by hand. The tool does not change what is and is not allowed; it just makes both faster.

Do I still have to cite it if I changed every word?

Yes. The citation credits the idea, not the wording, so it is required even when no words are shared with the source. This is the rule people most often get wrong.

What is patchwriting?

Keeping the original author’s sentence structure and order of ideas while swapping individual words for synonyms. Most institutions treat it as plagiarism even when every word has changed. A real paraphrase restructures the sentence, not just its vocabulary.

How much do I need to change for it to count as my own writing?

Enough that the structure and the order of ideas are yours. Lay your version over the original: if the clauses still line up one for one, it is patchwriting no matter how many synonyms you used. And if the passage is someone else’s, it needs a citation regardless of how much changed.

Is it different if I am rewriting my own draft?

Completely. There is nobody to credit and no integrity question — it is editing. Use any mode as freely as you like. The only things to watch are meaning drift and losing your own voice, and the highlighted diff shows you both.

Is this AI rewriter free to use?

Yes — it is a free AI rewrite tool with no account needed, within a per-run word allowance shown next to the editor. Six of the nine modes and two of the three synonym levels are free; Academic, Creative, Custom and Extensive are part of Pro. The pricing page has the detail.

Will the paraphraser change my numbers, names and citations?

Not by default. Protect names & numbers is switched on, which holds figures, dates, proper nouns and links exactly as you typed them. You can also click any individual word and freeze it so it survives every run.

Can I use an AI rewriter to get past a plagiarism checker?

You should not, and we would rather say so plainly. Rewording text specifically so a similarity report will not flag it is treated as a separate offence from the copying itself. Being undetected is not the same as being honest. Paraphrase the source properly and cite it — that is both allowed and easier.

What is the difference between paraphrasing, summarising and quoting?

Quote when the exact wording is the point. Paraphrase when the idea matters and the wording does not. Summarise when only the gist is needed and the detail is not. All three require a citation when the source is not yours.

Is an AI rephraser the same thing as a paraphrasing tool?

Yes. Rephraser, paraphraser, reworder and rewriter all describe the same job: saying the same thing in different words. The distinctions are marketing, not method.

Can it rewrite a whole article, or just a sentence?

Both. Use the AI sentence rewriter on one awkward line, or paste several paragraphs and run them together. There is a word allowance per run, and you can upload a PDF, DOCX, TXT or Markdown file rather than pasting.

Can I use an AI article rewriter for SEO content?

Rewriting your own article to read better is worth doing. Rewriting someone else’s to republish is not: the ideas and the reporting are still theirs, and search engines have ranked on originality rather than word-level uniqueness for years. Reworded copy has nothing new to offer a reader.

Can it paraphrase in other languages?

Yes, in 64 languages across 73 regional variants, or it will detect the language you pasted. British and American English are handled as separate variants, since they are different registers rather than the same one.

What happens to the text I paste in?

It is sent in order to produce the rewrite and is not stored as text afterwards. Your work is saved in your own browser so you can come back to it. See the privacy policy for the detail.

The rest of the toolkit

Summarise instead when you only need the gist, check the grammar of what you have rewritten, or shift the register with the tone changer. One plan covers all of them, including the ones we have not built yet.