The 8 Best AI Rewriters on the Market

What if you could hand it over to a tool that takes your draft, realigns it with your style, and gives you a set of better variants?

That’s exactly what the best AI rewriter tools promise.

In this article, we’ll walk you through eight of the top options for polishing, repurposing and elevating existing content fast.

1. Wordtune

Wordtune is an AI-driven writing assistant whose primary job is helping you rephrase sentences, adjust tone, improve clarity and flow. It helps you say exactly what you mean by giving alternative phrasing suggestions while retaining the same meaning.

Features

• Rewrite / Paraphrase: You highlight a sentence or phrase and Wordtune offers several alternative ways to express it.
• Tone adjustment: Options like “Make it casual” or “Make it formal” let you change how the sentence comes across.
• Shorten / Expand: If you have a sentence that’s too long or too sparse, Wordtune offers “Shorten it” or “Expand it” to tighten or flesh out the wording.
• Summarize / Read: Beyond rewriting sentences, there’s a summarizing feature (sometimes branded “Wordtune Read”) that lets you compress longer passages, articles, or even transcripts into bite-sized versions.
• Integrations & extensions: Wordtune offers a browser extension (Chrome/Edge) and works with tools like Google Docs, Gmail, Outlook, which lets you work where you already write.

Rewriting quality

Many writers -including me- praise Wordtune excels at sentence-level improvements: making wording clearer, removing passive voice, tightening phrasing.

However, bigger rewrites — full paragraphs, major structural changes — can run into limitations. Sometimes it can miss the original context or shift nuance in a way you’d need to check manually.

Pricing

Wordtune offers a free tier and paid plans. Here’s a snapshot:

• Free plan: Allows you basic rewriting features but with limits (for example, 10 rewrites per day) in the free version.
• Paid plans: $6.99/month (annually billed) for limited daily use (30 rewrites per day) and higher tiers with unlimited rewrites.
• For teams or heavy usage, there are “Unlimited” or business plans with no caps, additional features (brand tone, premium support).

2. QuillBot

QuillBot is an AI-based writing assistant centred on rewriting existing text and improving your sentences. It’s especially popular among students, professionals and content creators for paraphrasing, grammar correction, summarisation and more.

Features
QuillBot offers a spectrum of capabilities you can lean on:

• A Paraphraser tool: It rewrites sentences/paragraphs, offering different “modes” such as Standard, Fluency, Formal, Creative, Shorten and Expand.
• Grammar and Spell Checker: It detects and corrects errors, helping your content look clean.
• Summarizer: Useful if you have long blocks of text you want to turn into bullet-points or a more compact form.
• Plagiarism Checker (premium): Helps ensure your rewritten text is unique and safe from duplication issues.
• Translator (some versions): It supports translation into multiple languages, which may help if you work in multilingual markets.
• Browser and App Extensions: QuillBot integrates with Chrome, Microsoft Word, Google Docs, making it easier to embed into your workflow.

Rewriting Quality
QuillBot paraphrasing tool is solid for sentence-level rewriting, especially when you need to avoid repetition or refresh old copy. For example, reviewers highlight how the different modes allow for tone and style adjustments.

However, some users report that because the tool focuses on sentence structure and synonyms, the rewritten text can occasionally feel “off” — overly formal, stilted, or losing some nuance of your original meaning.

Pricing
QuillBot offers both a free version and paid plans:

• Free: Basic use with restrictions (e.g., limited word-count for paraphrasing, fewer modes).
• Premium: Depending on billing period, you’ll pay around US $19.95/month if billed monthly; or as low as ~US $8.33/month if billed annually.
  It’s worth noting that even with Premium, some features (like summariser word limits) still have caps.

3. Grammarly

Grammarly is a widely-used AI-powered writing assistant that helps you refine text with a focus on grammar, clarity, tone and style. It can also serve as a polishing & rewriting too to ensure your text reads well and doesn’t include errors.

Features
Here’s what Grammarly brings to the rewriting/editing table:

• Grammar, spelling and punctuation checks: It catches errors you might miss, so your content stays clean and professional.
• Clarity and readability suggestions: It flags wordy sentences, passive voice, unclear structure and recommends better phrasing.
• Tone detection & adjustment: It lets you tailor your text’s tone (e.g., formal, friendly) to match your audience.
• Browser extension / integrations: Works as a plugin in Google Docs, Microsoft Word, browser editors, so you can use it inside your existing workflow.
• Paraphrasing / rewriting support (limited): It offers suggestions for rewriting sentences, alternative wordings or reorganising text, though this is less robust than dedicated rewriter tools.
• Plagiarism check (in premium version): Good for content marketers concerned about copy-duplication or content reuse issues.

Rewriting Quality

On the plus side: Grammarly is excellent for cleaning up content. It reliably fixes surface errors, improves readability and tone, and helps your brand voice stay consistent. Reviewers call it “one of the most advanced tools for checking spelling and grammar errors.”

On the flip side: When it comes to deep rewriting, while it does suggest alternative wordings and sentence structures, these changes are usually minimal, more about polish than transformation.

Pricing
Grammarly offers a free version and paid tiers:

• Free plan: Covers basic grammar/spell check and general suggestions. Good to start with if you’re on a budget.
• Premium plan: Pro (individuals/teams): $12/member/month billed annually, or $30/member/month billed monthly. Includes advanced suggestions (style, tone, clarity), plagiarism checker and full features.

4. Scribbr

Scribbr offers human correction services, but also a AI-powered paragraph and sentence rewriting tools. These can refresh short blocks of text—such as intros, meta descriptions, or snippets.

Features
Here are the key features you’ll want to consider:

• Free access without registration: The paragraph rewriter allows you to rewrite as many paragraphs as you like, up to ~125 words each, with no login required.
• Two rewriting modes: For example in their sentence-rewriter you can choose between “Standard” (keeping more of the original structure) and “Fluency” (improving language/correcting grammar).
• Interactive thesaurus: After rewriting, you can click on individual words to select synonyms, giving you more control over tone and word choice.
• Upload capability: You can upload documents in formats like Microsoft Word, Google Docs or PDFs, process them in paragraph-chunks, then export.
• Integration of paraphrasing and rewriting tools: Scribbr has different tools (paragraph rewriter, sentence re-writer, rewording tool) that handle slightly different levels of text rewriting.

Rewriting Quality

• It does well for short snippets: If you need to refresh a paragraph or rephrase a headline/caption, Scribbr will get you started fast with alternate wording. For example, users say that while the output sometimes needs adjustment, the free tool is “worth checking out”.
• But limitations apply: The input limit is around 125 words per paragraph for the free tool. If you try to redo full blog posts or long content blocks, you’ll need to chunk the text and handle continuity manually.
• Quality-control is essential: Because the rewriting is automated, you must still review output to ensure brand voice, accuracy, readability and SEO compliance.

Pricing
One of Scribbr’s standout features is its cost:

• Paraphrasing/rewriting tool: Free to use online; typical input cap is ~125 words per submission (you can run multiple submissions).
• Professional proofreading & editing (human): per-word pricing that varies by turnaround and service level. As a reference: $0.017–$0.034 per word (e.g., ~$161 for 8,000 words with 7-day turnaround; higher for faster).

5. Undetectable AI

Undetectable AI is an AI-tool that humanize AI-generated text with multiple algorithmics techniques. It specifically aims to “avoid detection” by AI content-detectors.

Features

• AI detection aggregator: The tool claims to run your content through multiple AI detector engines and provide a score or “likelihood” that the text is AI-written.
• Humaniser / rewriting mode: After detection, you can ask the tool to “humanise” or rewrite existing AI text to make it sound more natural or “less AI”.
• Customisation for tone/readability: Some reviews report that you can select a readability level or tone (e.g., “university, marketing, simple”) so the rewritten text better matches your audience.
• Web interface + simple workflow: The tool is cloud-based, you paste in text → get a detection score → choose rewriting options → download/export.

Rewriting Quality

• Strengths: If you’re working with shorter blocks of AI-generated text (paragraphs, intros, sub-sections), reviewers found that using Undetectable AI can improve human-likeness — reduce mechanical phrasing, add variability, adjust tone.
• Limitations: The performance is inconsistent. Some tests found that even after rewriting the content with the tool, advanced detectors still flagged the output as AI-generated
  Areviewer noted the rewriting sometimes degraded grammar or coherence:
  “The text doesn’t sound more human but rather it is an attempt to bypass AI detectors.”

Pricing
The pricing varies, and the publicly available data suggests:

• Free-trial or limited-use versions: You may get a small volume of rewriting/detection credits to test the tool.*
• Paid tiers: One review cited pricing beginning around US $9.99/month for 10,000 words, or discounted if billed annually.

6. RewriteGuru

RewriteGuru is a online rewriting tool that positions itself as a quick way to take existing text and generate a fresh version with alternate phrasing. It offers multiple rewriting “modes”, supports several languages, and also bundles in a plagiarism-checker and grammar/spell-check utility.

Features

• Multiple rewriting modes: Standard, Creative (or “Ultra”), AI Rewriter + Smart/Ultra Spin, Replace Manually. These let you choose how aggressively the text will be altered.
• Paragraph or article rewriter: You paste or upload content, select a mode, and the tool outputs a rewritten version.
• Language support: Several languages beyond English are supported, which helps if you work in multilingual markets.
• Plagiarism checker: RewriteGuru also gives you a check for duplicate content, albeit the reliability is mixed.
• Free version + paid tiers: The free version has word-limit constraints; paid versions open up more lenient usage.

Rewriting Quality

Strengths

• It’s fast and very easy to use: simply paste text, pick a mode, and you get output in seconds.
• For shorter pieces or low-stakes rewrites (e.g., blog intros, social posts), it may quickly generate a variant that saves you time.
• If cost is a constraint, it presents a budget-friendly way to experiment with rewriting.

Limitations

• Several independent reviews flagged that the plagiarism-check and rewriting are not as robust as premium tools. For example, in testing its plagiarism scanner against more trusted tools, it missed a significant portion of patchwork plagiarism.
• Because of the aggressive rewriting modes (especially “Ultra” or “Smart Spin”), the output may lose nuance, brand voice or readability if you don’t edit it afterward.
• Free version has a low word-limit which means you’ll need to chunk content or upgrade if you’re doing long-form rewrites.

Pricing
Here are what you should know about the cost for RewriteGuru:

• Free plan: Allows rewriting up to around 800 words per session.
• Paid plans: One listing shows a “Basic” plan for ~$14.98/month with a 10,000 word-cap and a “Pro” plan around ~$20.98/month with higher caps and more modes.
• Given the limitations noted above, you’ll want to evaluate whether the quality you require justifies an upgrade.

7. Rytr

Rytr is an AI-driven writing assistant that also rewrites existing text. It can generate new variants for testing, and smooth out content before you finalize it.

Features
Here are the standout features of Rytr that you can plug into your workflow:

• Use case templates: Over 40 different templates or “use cases” (blog outlines, social captions, ads, email copy, etc.).
• Tone and language settings: You choose the writing tone (e.g., friendly, formal) and the language (Rytr supports 30+ languages).
• Rewriting and rewording features: Besides generation, it includes tools to rephrase, shorten or expand existing text.
• Plagiarism check (in some plans): Built-in check to confirm originality.
• Free version + affordable paid plans: Permits testing before committing larger budgets.

Rewriting Quality

• Strengths: Many users say Rytr works best for shorter or mid-length content refreshes. If you’re rewriting paragraphs, social posts or email copy, the tool gives you a good starting point. For example, one review noted: “Very easy to use … great value for money … produces a wide range of content.”
• Areas needing attention: When it comes to full long-form rewrites, the tool may struggle to maintain consistent tone, structure, or depth across large texts. For example: “Not great for long-form content. … it starts producing very odd, repetitive, and often nonsensical output.”

Pricing
Here’s a breakdown of how Rytr’s cost structure works and what you should consider:

• Free plan: Allows you to try the tool with limited capacity (e.g., character or output limits) so you can test whether rewriting quality meets your needs.
• Paid plans: Around US $9/month for a ‘Saver’ plan and higher for more features or unlimited usage.

8. Jasper

Jasper is an AI-driven writing assistant built with marketers and agencies in mind. It can serve both as a rewriting tool and as a platform for generating new drafts from your existing copy or ideas.

Features
Here are the key capabilities of Jasper that can impact your rewriting workflow:

• Paraphrase & Improve Templates: Jasper offers a “Content Improver” or “Paraphrase” template that lets you take input text and have the tool rewrite it, adjust tone and refine wording.
• Brand Voice Customization: You can train Jasper on your own writing (via text, documents or URL) so the AI better mimics your brand tone and terminology. This is crucial for rewriting content that doesn’t sound generic or AI-like.
• Templates & Workflows: Beyond rewriting, Jasper includes 50+ templates (blog posts, listicles, ads, social copy) which you can use to repurpose your content into different formats, thus rewriting large blocks and then slicing them into channels.
• Integration with SEO Tools & Campaigns: If your rewriting goal also includes SEO optimisation, Jasper integrates with tools like Surfer SEO to guide content structure and keyword usage.
• Collaboration & Team Features: For agencies or marketing teams doing rewrites at scale (multiple writers, campaigns, brand voices), Jasper supports multi-user seats, campaign management and version control.

Rewriting Quality

• Strengths: Many content marketers report that Jasper is a strong ally when rewriting or repurposing content. It’s especially useful for refreshing draft content, spinning it into different formats or adjusting voice and tone at scale.
• Limitations: On the flip side, Jasper isn’t perfect. It may struggle with deeply technical subjects, heavy domain-specific nuance or maintaining flawless coherence over very long rewrites.

Pricing

• Jasper offers a Creator plan (starting around US $49/month for one seat) that includes unlimited words, one brand voice and basic templates.
• A Pro or higher tier offers multiple brand voices, multiple users/seats, campaign management and advanced features (price around US $69/month or more) depending on size.