Claire FountainThe best AI rewriter tool in 2026 is QuillBot for most users. It's the most widely used paraphrasing tool available, with a generous free plan and nine rewriting modes.
For humanizing AI-generated content specifically, Undetectable AI outperforms QuillBot.
For writers who want rewriting built into their existing workflow without switching tabs, Grammarly is the better choice.
Table of Contents
- Our Favorite AI Rewriter Tools
- How We Tested These Tools
- 1. QuillBot
- 2. Undetectable.AI
- 3. Grammarly
- 4. BrandWell
- 5. ProWritingAid
- 6. Copy.ai
- 7. Jasper
- 8. WordAI
- 9. Frase.io
- AI Rewriter Test Results
- What Is an AI Rewriter Tool?
- How Do AI Rewriters Work?
- Can AI Rewrite an Article?
- What Are AI Rewriters Used For?
- Frequently Asked Questions
We offer this website completely free to our visitors. To help pay the bills, we’ll often (but not always) set up affiliate relationships with the top providers after selecting our favorites. However, we do our best not to let this impact our choices. There are plenty of high-paying companies we’ve turned down because we didn’t like their product.
An added benefit of our relationships is that we always try to negotiate exclusive discounts for our visitors.
Our Favorite AI Rewriter Tools
- QuillBot (4.8/5), Best for most users
- Undetectable.AI (4.6/5), Best for humanizing AI content
- Grammarly (4.5/5), Best for writers who want rewriting in their workflow
- BrandWell (4.3/5), Best for rewriting full articles
- ProWritingAid (4.2/5), Best for creative writers
- Copy.ai (4.1/5), Best tone options
- Jasper (4.1/5), Best for marketing teams
- WordAI (4.0/5), Best for bulk rewriting
- Frase.io (4.0/5), Best for SEO content marketers
How We Tested These Tools
We put each tool through the same three tests: rewriting a 300-word informational paragraph, rewriting a section of AI-generated text, and rewriting marketing copy that needed a tone change. We evaluated output quality by reading each result aloud robotic phrasing or changed meaning was an automatic mark against a tool.
We scored each tool across four criteria: output quality, ease of use, value for money, and how well it handles longer content. Scores are averaged to produce the final rating. We also verified current pricing across all tools before publishing.
1. QuillBot
Best for Most Users: 4.8/5 Rating
QuillBot is the most widely used AI rewriting tool available, with over 125 million users. It offers nine rewriting modes: Standard, Fluency, Formal, Simple, Creative, Expand, Shorten, Academic, and Custom, giving you more control over output style than any other tool on this list.
Beyond rewriting, it's a complete writing suite. The grammar checker, plagiarism detector, summarizer, citation generator, and AI humanizer all live in one place, which is why it's our top pick for students, content writers, and anyone who needs a general-purpose rewriter.
The free plan caps you at 125 words at a time, which is enough to test it, but limiting for longer work. Worth noting: QuillBot is not designed to bypass AI detectors. Tests show roughly a 42% bypass rate against tools like Turnitin and Originality.ai. For detection bypass specifically, see Undetectable AI below.
Read our QuillBot review.
Pricing: Free (125 words). Premium $9.95/month or $8.33/month billed annually ($99.95/year). Students with a .edu email pay $6.25/month annually.
Pros
- Nine rewriting modes offer more control than any other tool here
- Works in Chrome extension and Microsoft Word
- Grammar checker, plagiarism detector, and summarizer included
- Generous free plan, no credit card required
- Most affordable premium plan on this list at $8.33/month annually
Cons
- Free plan limited to 125 words at a time
- “Creative” mode occasionally changes meaning; always review output
- Not effective at bypassing AI detectors
2. Undetectable.AI
Best for Humanizing AI-Generated Content: 4.6/5 Rating
Undetectable AI is purpose-built to make AI-written content pass detection tools like GPTZero, Originality.ai, and Turnitin. Unlike general rewriters that swap synonyms, it analyzes the structural patterns that detectors look for and rewrites around them. It checks your content against eight major AI detectors simultaneously so you can see results before and after in one place.
The interface is straightforward: paste your text, choose a writing mode (University, High School, Marketing, General, and more), and hit humanize. The output is genuinely more natural than the input, though you'll typically need light editing before publishing. One important practical note: it strips all formatting, so paste sections rather than whole documents.
Results vary across detectors. Independent testing shows roughly 87-88% bypass rates on average, with stronger performance on GPTZero and weaker performance closer to Turnitin's flagging threshold. It works best on content under 1,000 words per pass.
Read our Undetectable AI review.
Pricing: Free trial (250 words, 3 days). Monthly plans from $9.99/month for 10,000 words. Annual plans from $5/month.
Pros
- Built-in checker runs against 8 AI detectors simultaneously
- Eight writing style modes for different purposes
- Supports 50+ languages
- Simple, no-learning-curve interface
- Affordable entry plan at $9.99/month
Cons
- Strips all formatting paste in sections, not full documents
- Output usually needs light editing before publishing
- Bypass results vary across different detectors
3. Grammarly
Best for Writers Who Want Rewriting in Their Existing Workflow: 4.5/5 Rating
Grammarly is the only tool on this list that works invisibly inside your existing workflow, Gmail, Google Docs, Word, Slack, and virtually any browser text field. Rather than copying and pasting into a separate tool, rewrites happen in context as you write. That seamless integration is what earns it a top-three spot.
The rewriting features themselves live under GrammarlyGO, the built-in AI assistant. It handles full-sentence rewrites, tone adjustments, and content generation from prompts. Pro users get 2,000 AI prompts per month, which is enough for most individual writers. It also includes plagiarism detection and a real-time AI content checker.
It's not the strongest pure paraphraser. QuillBot beats it for volume and control. But if you're already in Gmail or Google Docs and want to improve a sentence without switching tabs, nothing integrates as smoothly.
Pricing: Free (basic grammar/spelling, 100 AI prompts/month). Pro $12/month billed annually or $30/month billed monthly. Students get 30% off.
Pros
- Works in Gmail, Google Docs, Word, Slack no copy-pasting needed
- Best-in-class grammar correction alongside rewriting
- Plagiarism checker included on Pro plan
- Tone detection and one-click tone adjustments
- 2,000 monthly AI prompts on Pro
Cons
- More expensive than alternatives at $30/month on monthly billing
- GrammarlyGO less powerful than dedicated rewriters for bulk work
- AI prompts limited heavy users will hit the cap
4. BrandWell
Best for Rewriting Full Articles: 4.3/5 Rating
Where most rewriters work paragraph-by-paragraph, BrandWell can rewrite entire long-form posts in one pass. It uses a combination of three AI engines alongside NLP and semantic search analysis, which keeps the output coherent across a full article rather than producing disjointed paragraph-level rewrites that don't flow together.
The built-in plagiarism checker and AI detector add value for content teams publishing at volume. It's the most expensive tool on this list, which makes it hard to justify for individual writers, but for teams running multiple sites who need full-article rewriting, it's the strongest option available.
Read our BrandWell review.
Pricing: Paid plans from $99/month. No meaningful free tier.
Pros
- Rewrites full articles in one pass not just paragraphs
- Three AI engines produce more coherent long-form output
- Built-in plagiarism checker and AI detector
- Best option for content teams publishing at scale
Cons
- Expensive starts at $99/month, hard to justify for individuals
- Credits expire monthly
- No free plan to test before committing
5. ProWritingAid
Best for Creative Writers: 4.2/5 Rating
ProWritingAid goes deeper than any other tool here on readability, pacing, sentence variety, and style consistency, making it the strongest option for novelists, journalists, and long-form writers. Unlike GrammarlyGO, where you work through a chatbot, ProWritingAid highlights a sentence and offers several rewritten versions to choose from instantly. As a writer and editor, I find that the workflow is significantly faster.
Its Sparks feature rewrites with an awareness of the surrounding context, which preserves your voice better than tools designed for general content. It also integrates directly with Scrivener, the only tool on this list that does.
Pricing: Free (limited reports). Premium $30/month or $10/month billed annually. Lifetime license available.
Pros
- Best for long-form and creative writing, understands narrative context
- Offers multiple rewrite options per sentence, not just one
- Scrivener integration the only tool here that has it
- Affordable at $10/month annually
- Lifetime license available
Cons
- Interface has a steeper learning curve than Grammarly
- Browser extension less polished than competitors
- Plagiarism checks cost extra unless on Premium Pro
6. Copy.ai
Best Tone Options: 4.1/5 Rating
Copy.ai's rewriter stands out for tone flexibility. You can specify how aggressive the rewrite should be, choose from multiple tone presets, and get around ten different output variations at once. That makes it particularly useful for digital marketers and copywriters who need to test different angles on the same content.
Sentences up to 1,000 characters can be entered per pass, and you can save, discard, or generate more versions from any output. The free plan is more generous than most on this list.
Read our Copy.ai review.
Pricing: Free (2,000 words/month). Starter $49/month or $36/month annually.
Pros
- Generates ~10 rewrite variations at once more options than competitors
- Strong tone flexibility for marketing and copywriting
- Generous free plan
- Team collaboration features built in
Cons
- Less suited for academic or long-form editorial content
- Can feel formulaic on technical topics
- 1,000 character limit per pass
7. Jasper
Best for Marketing Teams: 4.1/5 Rating
Jasper uses a combination of large language models, including GPT-4 and Anthropic, rather than relying on a single model. That multi-model approach produces noticeably higher-quality output on complex or technical content compared to single-model tools. It supports over 29 languages and includes a Surfer SEO integration for keyword targeting and a plagiarism detection feature.
The rewriting tools sit inside a broader content creation platform with 50+ templates. Overkill for individual rewriting tasks, but strong value for marketing teams that need to generate and rewrite content in the same tool.
Read our Jasper review.
Pricing: Creator $49/month. Pro $69/month.
Pros
- Multi-model approach produces higher quality on complex content
- 50+ templates covering every content type
- Surfer SEO integration for keyword targeting
- Supports 29+ languages
- Team collaboration features
Cons
- Expensive for individual use
- Rewriting is one feature among many not the core focus
- Content still needs human review before publishing
8. WordAI
Best for Bulk Rewriting at Scale: 4.0/5 Rating
WordAI specializes in volume, where you can upload documents for bulk rewriting and generate up to 1,000 variations of an article. It restructures sentences rather than just swapping synonyms, which produces more readable output than older article rewriters. The SEO focus means rewrites are crafted with ranking in mind and are checked against plagiarism by default.
Best suited for content teams or agencies that need to produce variations of existing content at scale. For individual writers rewriting single pieces, the price is hard to justify.
Pricing: Starter $57/month or $27/month billed annually.
Pros
- Bulk rewriting up to 1,000 article variations
- Restructures sentences, not just synonyms
- SEO-focused output with plagiarism checking
- API access for developers
Cons
- Expensive for casual or individual use
- Output can sound mechanical on technical content
- Requires careful review for factual accuracy
9. Frase.io
Best for SEO Content Marketers: 4.0/5 Rating
Frase is primarily an SEO content platform that researches keywords, analyzes SERPs, and scores your content against competitors before you start writing. The rewriter generates three output variations per paragraph (up to 400 words), letting you pick or combine the best elements. What makes it stand out for content marketers is that rewrites happen with your target keyword in mind, making it more relevant for SEO work than general rewriting tasks.
Worth noting: the 400-word paragraph limit and 10,000-character cap per plan make it unsuitable for full-article rewriting. Best for optimizing individual sections of existing content rather than wholesale rewrites.
Read our Frase review.
Pricing: Solo $14.99/month. Basic $44.99/month. Team $114.99/month.
Pros
- SEO-aware rewrites keywords stay in mind throughout
- SERP analysis built in for content research
- Three output variations per rewrite to choose from
- Content scoring shows how well-optimized your page is
Cons
- 400-word paragraph limit not suited for full-article rewriting
- 10,000 character cap applies across all plans
- Expensive for solo use given the limitations
AI Rewriter Test Results
Below are the actual outputs from our rewrite test. We fed the same ChatGPT-generated paragraph into every tool on default settings and recorded the results. This gives you a direct comparison of how each tool handles the same input.
ChatGPT Original: Bringing a new puppy home is an exciting and heartwarming experience. The moment you open your door and see those wagging tails and bright eyes, you know your life is about to be filled with endless love and playful moments. As you introduce your furry friend to their new surroundings, you embark on a journey of companionship, training, and unforgettable memories that will last a lifetime.
QuillBot: A new dog is a joyous and touching experience to bring home. You can tell your life is about to be filled with limitless love and playful moments the instant you open your door and see their wagging tails and bright eyes. You start a path of companionship, training, and lifelong experiences as soon as you introduce your furry buddy to their new environment.
Undetectable.AI: Taking a puppy to your home is such an exhilarating and heartwarming event. The instant you open your door and catch sight of those wagging tails and sparkling eyes you just know that your life is about to be brimming with affection and delightful moments. As you acquaint your companion with their environment you set off on an adventure of camaraderie, teaching and indelible recollections that will endure forever.
Grammarly: Experience the joy and warmth of bringing a new puppy home with confidence. From the moment you open the door and see those wagging tails and bright eyes, you'll be filled with endless love and playful moments. Embark on a journey of companionship, training, and unforgettable memories that will last a lifetime as you introduce your furry friend to their new surroundings.
WordAI: A new puppy is a wonderful and exciting experience. When you see the wagging ears and bright eyes of your new puppy, you will know that your life will be filled with love and fun. You embark on an adventure of companionship and training as you introduce your pet to its new environment.
Copy.AI: Introducing a fresh puppy into your abode is a thrilling and warmhearted event. The instant you unlatch your entrance, witnessing those wagging tails and gleaming eyes, you comprehend that your existence is on the verge of being inundated with immeasurable affection and lively occurrences.
Frase.io: Getting a new puppy is super exciting and heartwarming. When you open your door and see those wagging tails and bright eyes, you just know your life is about to be filled with so much love and fun. As you introduce your furry friend to their new home, you start a journey of bonding, training, and making memories that you'll cherish forever.
ProWritingAid: Bringing a new puppy home is a thrilling and heartwarming adventure. When you open your door and see wagging tails and bright eyes, you know your life will be filled with love and playful moments. When you introduce your furry friend to their new surroundings, you start a journey of companionship, training, and unforgettable memories that will stay with you forever.
Jasper: Acquiring a fresh doggy companion is a thrilling and heartwarming event. When you unlatch your entrance and encounter those swaying tails and radiant gazes, you recognize that your existence is on the verge of being inundated with limitless affection and lively instants.
Provider Name | AI Score | Plagiarism Score | Readability Score | Word Count |
|---|---|---|---|---|
| ChatGPT 3.5 (Original) | ||||
| Undetectable.AI | ||||
| QuillBot | ||||
| Grammarly | ||||
| ProWritingAid | ||||
| Simplified | ||||
| Copy.ai | ||||
| Jasper | ||||
| Word AI | ||||
| Frase.io |
What Is an AI Rewriter Tool?
An AI rewriter, also known as a paraphrasing tool, takes input text and rewrites it while preserving the original meaning. Unlike old-school article rewriters that swapped words with synonyms, modern AI writing tools use natural language processing to understand context and restructure sentences in a way that reads naturally.
Most AI rewriters are used for one of three purposes: refreshing existing content for SEO, humanizing AI-generated drafts, or rewriting copy to test different tones and angles.
How Do AI Rewriters Work?
AI rewriters use large language models and NLP to read, understand, and rephrase content. They find structurally different ways to express the same idea, changing sentence order, vocabulary, and phrasing rather than simply substituting words with synonyms.
Some tools process a few sentences at a time, while others like BrandWell and WordAI handle full articles in one pass. The quality of output varies significantly depending on the model behind the tool, which is why testing before committing to a paid plan matters.
Can AI Rewrite an Article?
Yes, but not all tools handle full articles equally well. QuillBot, Grammarly, and ProWritingAid work best paragraph by paragraph. BrandWell and WordAI are specifically built for full-article rewriting and produce more coherent results across longer content. If you need to rewrite entire posts regularly, those two are worth the higher price.
What Are AI Rewriters Used For?
Content marketers use AI rewriters to refresh outdated posts, create SEO-optimized variations of existing content, and adapt long-form articles for different audiences or platforms. Freelance writers use them to rephrase clunky sentences and improve flow. Students use them to paraphrase sources and improve clarity. Content teams working with AI-generated drafts use humanizer tools like Undetectable AI to reduce detection scores before publishing.
Frequently Asked Questions
What is the best AI rewriter in 2026?
QuillBot is the best AI rewriter for most users in 2026. It offers nine rewriting modes, a generous free plan, and the widest range of built-in writing tools, including grammar checking, plagiarism detection, and summarizing. For humanizing AI-generated content specifically, Undetectable AI outperforms QuillBot.
What is the best free AI rewriter?
QuillBot offers the strongest free plan up to 125 words at a time with no credit card required, including access to its grammar checker and AI detector. Grammarly's free plan is better for editing and polishing, but more limited for rewriting. Copy.ai's free plan includes 2,000 words per month, making it a good option for short-form marketing copy.
What's the difference between an AI rewriter and a paraphrasing tool?
They're largely the same thing. Paraphrasing tools rewrite text while preserving meaning. AI rewriters do the same but typically use larger language models and offer more control over tone, length, and style. QuillBot and Grammarly are paraphrasing tools with AI rewriting capabilities built in.
Can AI rewriters bypass AI detection?
Not reliably on their own. QuillBot's Creative mode reduces detection scores on some tools but doesn't consistently pass Turnitin or Originality.ai; independent testing shows roughly a 42% bypass rate. For more consistent results, a dedicated AI humanizer like Undetectable AI is a better choice, though even purpose-built tools vary in effectiveness across different detectors.
Is QuillBot better than Grammarly for rewriting?
For pure rewriting and paraphrasing, yes, QuillBot is purpose-built for it with nine different writing modes and no copy-pasting required. Grammarly is better for grammar correction, tone adjustment, and editing writing already in progress. Many writers use both QuillBot to rework content and Grammarly to polish it.
What is the best AI rewriter for SEO?
Frase.io is the most SEO-aware rewriter on this list. It rewrites with your target keyword in mind and includes built-in SERP analysis. For content teams publishing at volume, BrandWell's full-article rewriting with built-in AI and plagiarism checking is also strong for maintaining SEO-friendly output.
