Best AI Paraphrasing Tools: Rewrite Without Plagiarism

Paraphrasing tools used to be simple synonym swappers that turned readable sentences into garbled messes. Those days are gone. Modern AI paraphrasing tools understand context, preserve meaning, and produce rewrites that read naturally. Some even adjust tone, formality, and sentence structure to match your specific needs.

But quality varies a lot between tools. Some still produce awkward phrasing that screams “machine-generated.” Others handle simple sentences well but fall apart with technical or nuanced content. And pricing models range from completely free to surprisingly expensive for what amounts to rewriting text.

We tested 9 paraphrasing tools by running the same passages through each one: an academic paragraph, a marketing copy block, a technical explanation, and casual blog content. Here is how they performed.

TL;DR: Top 3 Picks

QuillBot – Best overall paraphrasing tool with the most modes and flexibility

Wordtune – Best for sentence-level rewrites and tone adjustments

WordAI – Best for bulk content rewriting and SEO operations

How We Evaluated

Each tool was tested across four criteria:

• Rewrite quality: Does the output read naturally? Is the meaning preserved?
• Mode variety: Can you control formality, creativity, and style?
• Plagiarism safety: Do rewrites pass plagiarism checkers?
• Practical limits: Word counts, daily limits, and pricing fairness

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1. QuillBot

Overview

QuillBot is the most well-known paraphrasing tool for good reason. It offers 9 preset modes (Standard, Fluency, Formal, Simple, Creative, Expand, Shorten, Academic, and Custom) plus unlimited custom modes on Premium. The rewrites are consistently natural, and the tool handles academic, business, and casual content equally well.

The free version gives you Standard and Fluency modes with a 125-word limit per input. Premium removes all limits and adds advanced modes, a plagiarism checker, a citation generator, and an AI detector. QuillBot is available in 25+ languages and supports four English variants (US, UK, Canadian, Australian).

Key Features

• 9 preset paraphrasing modes plus unlimited custom modes (Premium)
• Freeze Words feature to lock specific terms from being changed
• Grammar Checker integrated into the editor
• Plagiarism Checker (Premium only)
• Citation Generator for academic work
• AI Detector and AI Humanizer tools
• Chrome extension, Google Docs add-on, and Microsoft Word integration
• 25+ language support

Pricing

• Free: Standard and Fluency modes, 125-word input limit, no plagiarism checker
• Premium: $19.95/month, $79.95/semi-annually, or $99.95/year ($8.33/month)
• Student: $74.95/year ($6.25/month) with verification
• Teams: From $7.50/user/month (annual billing only)
• 3-day money-back guarantee

Pros

• 9+ paraphrasing modes cover virtually every use case
• Freeze Words feature gives fine control over output
• Generous free version for basic needs
• Strong academic tools (citations, plagiarism checker, AI detector)
• Works across 25+ languages

Cons

• Free version has a restrictive 125-word limit per input
• Premium pricing is fair but not cheap ($8.33/month annually)
• Some modes produce very similar outputs to each other
• Plagiarism checker is locked behind the paywall
• Occasional odd phrasing in Creative mode

Best For

Students, academics, and professional writers who need a reliable all-around paraphrasing tool with strong mode variety and academic features.

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2. Wordtune

Overview

Wordtune takes a different approach than most paraphrasing tools. Instead of rewriting entire paragraphs, it focuses on sentence-level rewrites with tone control. You highlight a sentence, and Wordtune offers multiple alternatives in different styles: Formal, Casual, Shorten, Expand, and more.

This sentence-by-sentence approach gives you more control over the final output. You see multiple options for each sentence and pick the one that fits best. For writers who want to refine their existing work rather than wholesale replace it, Wordtune feels more like a writing partner than a rewriting machine.

Key Features

• Sentence-level rewrite suggestions with multiple alternatives
• Tone adjustments (Formal, Casual, Shorten, Expand, Clear, Engaging)
• Long-form assistant for expanding brief ideas into full paragraphs
• Spelling and grammar corrections
• Text summarization for articles, PDFs, and YouTube videos
• Microsoft Word and browser integrations
• Premium support on Unlimited plan

Pricing

• Basic (Free): 10 rewrites/day, 3 AI summaries, basic grammar and spelling
• Advanced: $13.99/month ($6.99/month annual) – 30 rewrites/day, 15 summaries
• Unlimited: $19.99/month ($9.99/month annual) – unlimited rewrites, all features
• Teams: $7.99/seat/month (annual) – centralized billing, dedicated support
• 30% discount for students, educators, and non-profit employees
• No refund policy; cancel before next billing cycle

Pros

• Sentence-level rewrites give you fine-grained control
• Multiple alternatives let you choose the best option
• Tone adjustment is genuinely useful and accurate
• Clean, intuitive interface
• Summaries of articles, PDFs, and YouTube videos are a nice bonus

Cons

• Free plan is very limited (10 rewrites per day)
• No dedicated plagiarism checker
• Cannot rewrite large blocks of text at once
• No refund policy
• Narrower feature set than QuillBot

Best For

Professional writers and editors who want precise, sentence-level control over tone and style rather than bulk paragraph rewrites.

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3. WordAI

Overview

WordAI is built for a different user than QuillBot or Wordtune. It targets SEO professionals and content marketers who need to create multiple unique versions of the same article. The tool understands full sentence meaning and restructures content to produce genuinely unique output while keeping the original intent intact.

The bulk processing feature is its biggest selling point. Upload multiple articles and generate hundreds of unique variations from a single piece. The tool integrates with Copyscape for plagiarism verification, ensuring each variation passes uniqueness checks.

Key Features

• Sentence-level meaning understanding for natural rewrites
• Multiple uniqueness levels (Conservative to Extremely Unique)
• Bulk article processing for high-volume operations
• Automatic spelling and grammar correction
• Copyscape integration for plagiarism verification
• API access for custom integrations
• Text enricher for improving paragraph quality

Pricing

• Starter: $17/month ($9/month annual)
• Power: $57/month ($27/month annual)
• 3-day free trial
• 30-day money-back guarantee (under 10 articles rewritten)

Pros

• Bulk processing is unmatched for high-volume rewriting
• Multiple uniqueness levels give useful control
• Copyscape integration validates uniqueness automatically
• API access enables automated workflows
• 30-day money-back guarantee is generous

Cons

• Aggressive uniqueness settings sacrifice readability
• English language only
• No tone or formality controls
• Designed for commercial use, not academic writing
• Higher uniqueness levels sometimes produce awkward phrasing

Best For

SEO professionals and content marketers who need bulk rewriting capabilities with plagiarism verification.

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4. Grammarly

Overview

Grammarly is primarily known as a grammar checker, but its paraphrasing capabilities have grown substantially. Free users get 100 paraphrasing prompts monthly, and Premium users get 2,000. The tool can rephrase sentences, paragraphs, or larger sections with tone-aware adjustments.

What sets Grammarly apart is that paraphrasing is integrated into a full writing assistant. You get grammar checking, tone detection, style suggestions, and paraphrasing in one tool. For writers who need a single solution for polishing their work, Grammarly covers a lot of ground.

Key Features

• Paragraph and section-level paraphrasing
• Tone detection and adjustment
• Full grammar, spelling, and punctuation checking
• Style and clarity suggestions
• Plagiarism detection (Premium)
• 2,000 AI prompts per month on Premium
• Browser extension, desktop app, Google Docs, Microsoft Office integrations

Pricing

• Free: Basic grammar checks, 100 AI prompts/month
• Pro: $30/month, $20/month quarterly, or $12/month annually ($144/year)
• Enterprise: Custom pricing
• 30% student discount available ($100.80/year)

Pros

• Paraphrasing is part of a full writing assistant suite
• Excellent grammar and style checking alongside rewrites
• Works everywhere (browser, desktop, mobile, Google Docs, Word)
• Tone detection helps match rewrites to your intent
• Strong plagiarism checker on Premium

Cons

• Not a dedicated paraphrasing tool; fewer rewrite modes than QuillBot
• Premium pricing is on the higher side for paraphrasing alone
• 100 free AI prompts is limiting for regular use
• No refund policy on Pro plans
• AI features sometimes suggest unnecessary changes

Best For

Writers who want grammar checking and paraphrasing in a single tool and are willing to pay for the convenience.

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5. LanguageTool

Overview

LanguageTool stands out for its multilingual capabilities. Supporting over 30 languages with six English dialects, it offers grammar checking and AI-powered sentence paraphrasing in far more languages than any competitor. The Premium plan includes unlimited sentence paraphrasing alongside style guide features and Picky Mode for deeper writing analysis.

The paraphrasing feature specifically offers rewrites that are formal, fluid, or shorter. It is not as full-featured as QuillBot’s 9 modes, but the quality of rewrites is consistently natural, and the multilingual support is unmatched.

Key Features

• AI sentence paraphrasing (formal, fluid, shorter options)
• Grammar, spelling, and punctuation checking in 30+ languages
• Picky Mode for deeper style analysis
• Personal dictionary and style guide
• Google Docs, Microsoft Word, Gmail, and browser integrations
• Six English dialect options (US, UK, Australian, Canadian, South African, New Zealand)
• Open-source core

Pricing

• Free: Basic grammar checking, 20,000 characters per text field
• Premium: $19.90/month, $13/month quarterly, or $4.99/month annually ($59.90/year)
• Teams: Starting at $9.48/month for 2 users
• 14-day money-back guarantee
• Student and educator discounts (up to 20% off)

Pros

• Best multilingual support (30+ languages)
• Very affordable Premium plan at $4.99/month annually
• Clean interface with no learning curve
• 14-day money-back guarantee with no questions asked
• Open-source foundation builds trust

Cons

• Fewer paraphrasing modes than QuillBot (3 vs 9+)
• No plagiarism checker
• Free version character limit is generous but still exists
• AI paraphrasing is limited to sentence-level rewrites
• Not designed for bulk rewriting

Best For

Multilingual writers and international teams who need grammar checking and paraphrasing across multiple languages at an affordable price.

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6. Hypotenuse AI

Overview

Hypotenuse AI is not a traditional paraphrasing tool. It is a content platform with particularly strong rewriting capabilities built for eCommerce and marketing teams. The paraphrasing feature rewrites content using your target tone and keywords, making it especially useful for product descriptions, ad copy, and SEO content that needs to be unique across multiple pages.

The tool produces unusually natural rewrites that feel closer to human writing than most competitors. For businesses that need to rewrite product catalogs or adapt content for different markets, the bulk capabilities and brand voice features add real value.

Key Features

• Content rewriting with tone and keyword targeting
• Brand voice customization for consistent rewrites
• Bulk content rewriting capabilities
• SEO-optimized output
• Product description generation
• Blog and article rewriting
• API access for integrations

Pricing

• Trial: 15 free uses
• Paid plans: Starting at $29/month
• Higher tiers add bulk rewriting and advanced SEO tools

Pros

• Very natural-sounding rewrites
• Brand voice customization produces consistent output
• Strong for eCommerce and product content
• Bulk capabilities for scaling operations
• SEO keyword integration in rewrites

Cons

• Only 15 free uses (no ongoing free plan)
• Starting at $29/month is expensive for just paraphrasing
• Less suited for academic or personal writing
• Sign-up required even for the trial
• Primarily marketed toward business users

Best For

eCommerce businesses and marketing teams that need bulk content rewriting with brand voice consistency and SEO keyword integration.

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7. Spinbot

Overview

Spinbot is the old guard of paraphrasing tools. It is completely free, requires no sign-up, and processes up to 10,000 characters (about 1,000 words) per input. That is genuinely useful for quick, basic rewrites when you just need a different version of a paragraph.

The trade-off is quality. Spinbot’s rewrites are functional but often awkward, requiring manual editing to sound natural. It does not understand context the way modern AI tools do, so technical content and nuanced writing often come out garbled. For simple, casual text, it works fine. For anything important, you will want a better tool.

Key Features

• Free paraphrasing with no sign-up required
• Up to 10,000 characters per input
• Basic synonym replacement and sentence restructuring
• Optional “Spin Specific Words” control
• No account needed

Pricing

• Free: All features included (ad-supported)
• CAPTCHAs required between uses

Pros

• Completely free with no sign-up
• Large input limit (10,000 characters)
• Fast processing
• No account or credit card needed

Cons

• Rewrite quality is below modern AI tools
• Ads and CAPTCHAs interrupt workflow
• No tone or style controls
• Does not handle technical or nuanced content well
• No grammar checking, plagiarism detection, or other features
• Cannot bypass AI detection

Best For

Casual users who need quick, free paragraph rewrites and do not mind doing some manual cleanup afterward.

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8. Scribbr

Overview

Scribbr offers a free, ad-free paraphrasing tool powered by QuillBot’s technology. It targets students and academic writers with Standard and Fluency modes. No sign-up is required, and the clean interface makes it simple to use. The tool handles document uploads, so you can paraphrase from PDFs and Word documents directly.

Scribbr’s broader platform offers pay-per-use plagiarism and AI detection checks starting at $19.95, making it a useful academic toolkit. The paraphrasing itself is free, though limited to 125 words per input (same as QuillBot’s free tier).

Key Features

• Free paraphrasing with Standard and Fluency modes
• No sign-up or account required
• Document upload support (PDF, Word)
• Ad-free interface
• Pay-per-use plagiarism checking ($19.95+)
• AI detection tools
• Powered by QuillBot technology

Pricing

• Paraphrasing: Free (125 words per input)
• Plagiarism Check: Starting at $19.95 per document (up to 7,500 words)
• Pay-per-use model (no subscriptions)

Pros

• Completely free paraphrasing with no ads
• No sign-up required
• Clean, distraction-free interface
• Document upload support is convenient
• Pay-per-use pricing avoids subscription commitment

Cons

• 125-word limit per input is restrictive
• Only Standard and Fluency modes (limited variety)
• Plagiarism checking is paid and relatively expensive per use
• Powered by QuillBot (might as well use QuillBot directly for more features)
• Limited to academic-focused use cases

Best For

Students who need quick, free paraphrasing for academic work and occasional plagiarism checking without a subscription commitment.

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9. Jasper AI

Overview

Jasper AI is overkill as a paraphrasing tool, but if you already subscribe for its content creation features, the rewriting capabilities are solid. Jasper can rephrase content while maintaining your Brand Voice, adjust tone and formality, and expand or condense text as needed.

The strength of using Jasper for paraphrasing is consistency. If you are rewriting content that needs to stay on-brand across your marketing materials, Jasper’s Brand Voice feature ensures every rewrite sounds like your company, not a generic AI.

Key Features

• Content rewriting with Brand Voice consistency
• Tone and formality adjustment
• Expand or condense options
• 50+ templates including paragraph rewriter
• Jasper Chat for conversational rewriting
• Browser extension for rewriting anywhere

Pricing

• Creator: $49/month ($39/month annual)
• Pro: $69/month ($59/month annual)
• Business: Custom pricing
• 7-day free trial

Pros

• Brand Voice keeps rewrites consistent with your brand
• Full content platform beyond just paraphrasing
• Good for marketing content that needs to stay on-brand
• 7-day free trial lets you test before committing

Cons

• Expensive just for paraphrasing ($39+/month)
• Not designed specifically as a paraphrasing tool
• Fewer rewrite modes than dedicated paraphrasing tools
• No plagiarism checker built in
• Overkill if you only need rewriting

Best For

Marketing teams already using Jasper for content creation who also need on-brand rewriting capabilities.

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Comparison Table

Tool	Starting Price	Free Tier	Modes/Styles	Plagiarism Check	Languages	Best For
QuillBot	$8.33/mo (annual)	Yes (limited)	9+ custom	Premium only	25+	All-around use
Wordtune	$6.99/mo (annual)	Yes (10/day)	6 tones	No	English	Sentence rewrites
WordAI	$9/mo (annual)	3-day trial	Uniqueness levels	Via Copyscape	English	Bulk rewriting
Grammarly	$12/mo (annual)	Yes (100/mo)	Tone-based	Premium only	English	Grammar + rewriting
LanguageTool	$4.99/mo (annual)	Yes	3 styles	No	30+	Multilingual
Hypotenuse AI	$29/mo	15 free uses	Brand voice	No	English	eCommerce
Spinbot	Free	Full access	Basic	No	English	Quick free rewrites
Scribbr	Free	Yes	2 modes	Pay-per-use	English	Students
Jasper AI	$39/mo (annual)	7-day trial	Brand Voice	No	30+	Marketing teams

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FAQ

Are AI paraphrasing tools safe for academic work?

That depends on your institution’s policies. Most paraphrasing tools produce output that passes plagiarism checkers, but many schools consider using AI tools for assignments a form of academic dishonesty. QuillBot and Scribbr are popular among students, but always check your school’s AI usage policy before submitting paraphrased work. The safest approach is to use these tools for learning how to rephrase ideas, then write the final version yourself.

Can paraphrased text be detected as AI-generated?

Yes, especially if you use aggressive rewrite settings. AI detection tools like Originality.ai and GPTZero can often identify machine-paraphrased content. Tools like QuillBot’s AI Humanizer attempt to make rewrites less detectable, but no tool guarantees undetectable output. For content where AI detection matters, manual editing of the paraphrased output significantly reduces detection rates.

What is the difference between paraphrasing and spinning?

Paraphrasing rewrites content to express the same ideas in different words while maintaining readability and natural flow. Spinning is the older, cruder approach of swapping synonyms and rearranging words mechanically, often producing barely readable text. Modern AI paraphrasing tools understand context and sentence meaning, producing output closer to how a human would rephrase something. Spinbot is closer to traditional spinning; QuillBot and Wordtune are true paraphrasers.

Which free paraphrasing tool is the best?

QuillBot’s free tier offers the most functionality: two paraphrasing modes with unlimited uses (125-word limit per input). Scribbr offers a similar experience without ads. Spinbot allows longer inputs (10,000 characters) but lower quality. For regular use, QuillBot Free is the best starting point. If you find the 125-word limit frustrating, Spinbot’s larger input limit is a reasonable trade-off for lower quality.

Do I need a paraphrasing tool if I already have ChatGPT?

ChatGPT can paraphrase text effectively, but dedicated tools offer advantages. QuillBot’s multiple modes give you more control over output style. Wordtune’s sentence-level alternatives let you pick the best option. WordAI’s bulk processing handles volumes ChatGPT cannot match efficiently. If you already pay for ChatGPT and only occasionally need to rephrase content, it handles the job fine. For regular, high-volume paraphrasing, a dedicated tool is worth the investment.

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Conclusion

The best paraphrasing tool depends on what you are rewriting and why. QuillBot is the strongest all-around choice with its 9+ modes, academic features, and reasonable pricing. Wordtune is better for careful, sentence-by-sentence refinement. WordAI wins for bulk commercial rewriting.

For casual use, QuillBot’s free tier and Spinbot cover basic needs without spending anything. For professional work, QuillBot Premium at $8.33/month annually or Wordtune Unlimited at $9.99/month annually both offer strong value.

The most important advice: never submit paraphrased content without reading it carefully. Even the best tools occasionally produce awkward phrasing, change meaning subtly, or miss context. Use paraphrasing tools to generate alternatives, then apply your own judgment to choose and refine the final version.

For more insights, check out our guide on Grammarly alternatives.

For more insights, check out our guide on AI grammar checkers.

For more insights, check out our guide on AI writing tools for SEO.