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QuillBot

QuillBot

AI writing platform specializing in paraphrasing with 9+ customizable modes, plus grammar checking, summarizing, plagiarism detection, translation, and the integrated QuillBot Flow writing environment.

Free AvailableParaphrasingAcademicBrowser ExtensionSummarizer
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Visitas mensuales

43.5M

Modos de paráfrasis

9+

Valoración en Chrome Store

4.6/5

Fundado

2017

Idiomas del traductor

50+

Formatos de cita

1,000+

Introducción

QuillBot is an AI-powered writing platform that launched in 2017, initially focused on its powerful paraphrasing engine that earned it the reputation as a "full-sentence thesaurus." Since then, QuillBot has evolved into a comprehensive writing toolkit used by millions of students, academics, professionals, and content creators worldwide, earning a 4.6/5 rating on the Chrome Web Store and attracting over 43.5 million monthly visits.

What sets QuillBot apart from other writing assistants is its advanced paraphrasing technology with 9+ distinct modes — Standard, Fluency, Formal, Simple, Creative, Academic, Expand, Shorten, and Custom — that provide precise control over how text is rewritten. The Synonym Slider lets users adjust how aggressively words are replaced on a spectrum from minimal to maximum variation, and the Freeze Words feature (Premium) keeps specific terms unchanged during paraphrasing, which is invaluable for maintaining technical accuracy.

Beyond paraphrasing, QuillBot now offers a complete writing ecosystem: Grammar Checker, Summarizer, Citation Generator, Plagiarism Checker, AI Detector, AI Humanizer, and Translator — all accessible through the unified QuillBot Flow writing environment. This integrated approach lets users complete entire writing workflows without switching between tools, from initial research and source summarization through drafting, editing, citation formatting, and originality verification. The platform is particularly popular in academic settings where proper paraphrasing of source material is a critical skill.

Ventajas

  • +Industry-leading paraphrasing with 9+ customizable modes and Synonym Slider
  • +Affordable Premium pricing at approximately $8/month when billed annually
  • +Comprehensive tool suite beyond just paraphrasing (Summarizer, Translator, Plagiarism Checker)
  • +QuillBot Flow integrates research, writing, and editing in one workspace
  • +Excellent for academic workflows with Citation Generator supporting 1,000+ formats
  • +Free Citation Generator with full access to all formatting styles
  • +AI Humanizer helps refine AI-generated content for naturalness
  • +User-friendly interface with 4.6/5 Chrome Web Store rating

Desventajas

  • -Paraphrasing can sometimes change meaning subtly or produce awkward phrasing
  • -AI Detector results can be inconsistent across different text samples
  • -Grammar checking is less comprehensive than dedicated tools like Grammarly
  • -Free version word limits are quite restrictive (125 words for paraphrasing)
  • -Plagiarism Checker has a monthly quota limit of 25,000 words
  • -Not designed for generating original long-form content from scratch

Características principales

Paraphraser (9+ Modes)

Rewrite text using Standard, Fluency, Formal, Simple, Creative, Academic, Expand, Shorten, or Custom modes. The Synonym Slider adjusts word replacement aggressiveness, and Freeze Words (Premium) keeps specific terms unchanged. Compare Modes shows the same text rewritten in multiple styles side by side.

Grammar Checker

Identify and fix grammar, spelling, punctuation, and style errors in your writing. Supports English (multiple dialects), German, French, Spanish, Portuguese, and Dutch. Advanced mode (Premium) provides more nuanced suggestions for sentence structure and word choice.

Summarizer

Condense long texts into Key Sentences (bullet points highlighting the most important ideas) or cohesive Paragraphs (fluent summary narrative). Adjustable summary length with custom instruction support. Free tier handles 600 words, Premium processes up to 6,000 words per input.

QuillBot Flow

Integrated writing environment combining all QuillBot tools with built-in research search, "Suggest Text" AI writing assistance, document templates, and note-taking in one unified workspace. Eliminates tab-switching between separate tools during research and writing.

Plagiarism Checker

Compare text against billions of online sources to identify potential plagiarism. Highlights similar passages with direct links to original sources for easy verification and citation. Premium users get 25,000 words per month of plagiarism scanning capacity.

AI Detector

Analyze text for AI-generated or AI-edited content patterns. Provides percentage scores by section and detects output from ChatGPT, Claude, Gemini, and various paraphrasing tools. Supports analysis in English, Spanish, German, French, and Dutch.

AI Humanizer

Refine AI-generated text to sound more natural and human-written by reducing robotic patterns, formulaic structures, and overly predictable phrasing. Uses QuillBot's paraphrasing engine with modes specifically optimized for naturalness.

Citation Generator

Create properly formatted citations and bibliographies in APA, MLA, Chicago, Harvard, and 1,000+ other academic and professional formats. Completely free to use and integrated directly into QuillBot Flow for seamless academic writing workflows.

Translator

Translate text between 50+ languages including English, Spanish, French, German, Chinese, Japanese, Korean, Arabic, Hindi, and Portuguese. Useful for accessing foreign-language sources during research or creating multilingual content.

Tone Insights (Premium)

Analyze the emotional tone, formality level, and confidence of your paraphrased text. Compare how different paraphrasing modes affect the perceived tone to find the best match for your intended audience and communication purpose.

¿Quién debería usarla?

Academic Writing and Research

Students and researchers use QuillBot to properly paraphrase source material for essays, theses, and research papers. The Academic mode rewrites text in scholarly tone, the Citation Generator handles proper attribution in APA, MLA, and Chicago formats, and the Plagiarism Checker verifies originality before submission. The Summarizer helps quickly digest lengthy research papers.

College students, graduate researchers, PhD candidates, and academic writers

ESL and Multilingual Writing

Non-native English speakers use QuillBot to improve the fluency and naturalness of their writing. The Fluency mode polishes awkward phrasing, the Grammar Checker catches common ESL errors, and the Translator helps with 50+ languages. The ability to see multiple paraphrasing options side by side helps learners understand natural English phrasing patterns.

ESL students, international professionals, and multilingual content creators

Content Repurposing and SEO

Content marketers use QuillBot to repurpose existing content for different channels and audiences. The Expand mode adds detail for long-form articles, Shorten mode creates concise social media versions, and Formal/Simple modes adjust tone for different platforms. The AI Humanizer refines AI-generated drafts to sound more natural and authentic.

Content marketers, SEO specialists, bloggers, and social media managers

Professional Document Editing

Business professionals use QuillBot to refine reports, proposals, emails, and presentations. The Formal mode elevates casual drafts to professional standard, the Grammar Checker ensures accuracy, and the Tone Insights feature (Premium) analyzes whether the writing strikes the right emotional register for the intended audience.

Business professionals, corporate communicators, and freelance writers

Planes de precios

Free

$0/forever
  • Paraphraser: 125 words, 2 modes (Standard, Fluency)
  • Grammar Checker: Basic corrections
  • Summarizer: 600 words input
  • AI Detector: 1,200 words per scan
  • AI Humanizer: Basic modes
  • Translator: 5,000 characters
  • Citation Generator: Full access to all formats
Recomendado

Premium

$8.33/month

Billed annually ($99.95/year). Monthly: $19.95

  • Paraphraser: Unlimited words, 9+ modes + Custom
  • Max Synonym Slider and Freeze Words
  • Grammar Checker: Advanced suggestions
  • Summarizer: 6,000 words + custom instructions
  • Plagiarism Checker: 25,000 words/month
  • AI Detector and Humanizer: Unlimited
  • Translator: Unlimited characters
  • Tone Insights and Compare Modes

Team

$7.50/user/month

Minimum 5 users

  • All Premium features for every team member
  • Team management dashboard
  • Centralized billing and invoicing
  • Usage analytics and reporting
  • Priority customer support

Comparativa

QuillBot vs Grammarly

QuillBot and Grammarly are the two most popular AI writing assistants, but they excel in different areas. QuillBot is the clear leader in paraphrasing with 9+ modes and deep customization, while Grammarly provides more comprehensive grammar and style checking with better platform integration. QuillBot offers a broader tool suite (Summarizer, Translator, Citation Generator) at a lower price point, while Grammarly has stronger enterprise features.

QuillBot destaca en

  • +Superior paraphrasing with 9+ customizable modes and Synonym Slider
  • +Significantly more affordable ($8/mo vs $12/mo annual)
  • +Includes Summarizer, Translator, and Citation Generator
  • +QuillBot Flow provides an integrated research and writing workspace

Grammarly destaca en

  • +Grammarly offers more comprehensive grammar and style correction
  • +Grammarly integrates seamlessly across 500,000+ apps
  • +Grammarly has stronger enterprise features (Style Guides, Brand Tones)
  • +Grammarly provides better tone detection and adjustment

QuillBot vs Wordtune

Wordtune is QuillBot's closest competitor in the paraphrasing space, offering AI-powered rewriting with a focus on natural-sounding results. While Wordtune provides excellent single-sentence rewrites with an intuitive interface, QuillBot offers more modes, greater customization through the Synonym Slider, and a broader tool suite including Summarizer, Plagiarism Checker, and Citation Generator.

QuillBot destaca en

  • +More paraphrasing modes (9+ vs Wordtune's 3-4 options)
  • +Synonym Slider for fine-grained control over word replacement
  • +Broader tool suite including Summarizer and Citation Generator
  • +Lower price point with more generous free tier

Wordtune destaca en

  • +Wordtune often produces more naturally flowing rewrites
  • +Wordtune has a cleaner, more intuitive interface
  • +Wordtune integrates better with Google Docs

1. Getting Started with Paraphrasing

1. Visit quillbot.com or install the Chrome extension for in-browser paraphrasing 2. Select the Paraphraser tool from the main navigation 3. Paste or type your text in the input panel (Free: 125 words max per paraphrase) 4. Choose a paraphrasing mode based on your needs: - **Standard**: Balanced rewording that preserves meaning - **Fluency**: Focus on natural, smooth-flowing language - **Formal/Academic**: Professional or scholarly tone - **Simple**: Easy-to-understand language for broader audiences - **Creative**: More dramatic changes for fresh perspectives - **Expand/Shorten**: Adjust content length while preserving meaning 5. Click "Paraphrase" and review the results in the output panel 6. Click any word in the output to see synonym alternatives and fine-tune the result 7. Adjust the Synonym Slider (Premium) to control how aggressively words are replaced

2. Using QuillBot Flow for Research Writing

QuillBot Flow is your all-in-one writing workspace that eliminates switching between tabs: 1. Navigate to quillbot.com and select Flow from the sidebar (or access directly) 2. Start a new document or upload an existing file (Word, PDF supported) 3. Use the integrated **Research** search to find relevant sources on your topic 4. Add content from search results to your document — citations are auto-generated in your chosen format 5. Use **Suggest Text** to get AI-generated continuations when you need help moving forward 6. Highlight any text to access inline tools: paraphrase, summarize, check grammar, or translate 7. Use the Citation panel to manage all references and generate a bibliography 8. Export your finished document to Word or copy the formatted text Flow is particularly powerful for academic writing where you need to move between research, paraphrasing source material, drafting original content, and managing citations in a single workflow.

3. Complete Academic Writing Workflow

**Research Phase:** - Use Flow's research feature or the Summarizer to quickly digest lengthy papers and extract key points - The Translator helps access foreign-language sources and studies - Save important passages and notes within your Flow document **Writing Phase:** - Paraphrase source material using Academic or Formal mode with appropriate attribution - Use the Citation Generator for proper references in APA, MLA, Chicago, or 1,000+ other formats - Activate "Suggest Text" in Flow when you hit writer's block for AI-generated continuations **Editing Phase:** - Run the Grammar Checker for accuracy across grammar, spelling, and punctuation - Use the Shorten mode to meet word count limits without losing key content - Apply Tone Insights (Premium) to verify appropriate academic voice throughout **Final Verification:** - Run the Plagiarism Checker to verify originality against billions of sources - Use the AI Detector to assess AI tool usage levels if required by your institution - Review all citations for completeness and proper formatting

4. Advanced Paraphrasing Techniques

**Synonym Slider**: Drag left for minimal word changes that closely preserve the original phrasing, or drag right for maximum vocabulary variation that produces more creative rewrites. Start at the middle setting and adjust based on your needs. **Freeze Words**: A Premium feature that keeps specific terms unchanged during paraphrasing. Click "Freeze Words" and add your list of terms — essential for brand names, technical terminology, proper nouns, and specialized vocabulary that should never be altered. **Custom Mode**: A Premium feature where you describe your desired writing style in natural language, such as "Write like a tech journalist covering a startup launch" or "Make it sound academic but engaging for a general audience." QuillBot adapts its paraphrasing to match. **Iterative Refinement**: Do not accept the first result. Try different modes on the same text, adjust the Synonym Slider to different positions, make manual edits to key phrases, then paraphrase again for further refinement. **Compare Modes**: A Premium feature that shows the same input text paraphrased in multiple modes simultaneously, displayed side by side so you can compare outputs and choose the version that best fits your purpose.

Preguntas frecuentes

Yes, QuillBot offers a free tier with limited word counts (125 words for paraphrasing, 600 for summarizing, 1,200 for AI detection). The free version includes 2 paraphrasing modes (Standard, Fluency), basic grammar checking, and full access to the Citation Generator. Premium ($8.33/month annual) removes all limits and adds 9+ modes, Plagiarism Checker, Freeze Words, and advanced features.
QuillBot is extremely popular among students for paraphrasing research sources and summarizing papers. However, proper paraphrasing still requires citing original sources — QuillBot helps you express ideas in your own words but does not eliminate the need for attribution. The Citation Generator and Plagiarism Checker support proper academic practices.
Turnitin and similar plagiarism detection tools may flag QuillBot-paraphrased text, especially if the paraphrasing is minimal or the original source is in their database. AI detection tools (including QuillBot's own AI Detector) can also identify paraphrased patterns. Always properly cite all sources regardless of how thoroughly you paraphrase them.
QuillBot specializes in paraphrasing with 9+ customizable modes, a Synonym Slider, and a broader tool suite including Summarizer, Translator, Citation Generator, and the QuillBot Flow workspace. Grammarly excels at comprehensive grammar and style checking with more sophisticated corrections, tone detection, and enterprise features like Style Guides and Brand Tones. QuillBot is more affordable; many users combine both tools.
Support varies by tool: Paraphraser works in 20+ languages including English, Spanish, French, and German. Grammar Checker supports 6 languages. Translator handles 50+ languages. Plagiarism Checker scans content in 100+ languages. AI Detector analyzes text in 5 languages (English, Spanish, German, French, Dutch).
Yes, QuillBot has a dedicated AI Detector that analyzes text for patterns characteristic of AI generation. It provides a percentage score and highlights suspected sections. Like all AI detectors, results are probabilistic and may produce false positives or negatives, so they should be used as one data point rather than a definitive determination.
AI Humanizer is a tool designed to make AI-generated text (from ChatGPT, Claude, etc.) sound more natural and human-written. It uses QuillBot's paraphrasing engine with modes specifically optimized for reducing robotic patterns, formulaic structures, and overly predictable phrasing. However, it cannot guarantee undetectability by AI detection tools.
No, QuillBot requires an internet connection for all features. All text processing happens on QuillBot's cloud servers, so browser extensions and apps also need connectivity to function. There is no offline mode or local processing option.
QuillBot Flow is an integrated writing workspace that combines all QuillBot tools (paraphraser, grammar checker, summarizer, translator, citation generator) with built-in web research, AI text suggestions, and document management. It eliminates tab-switching during the writing process and is particularly useful for academic research and long-form content creation.
Yes, QuillBot can be used for commercial content creation including blog posts, marketing copy, product descriptions, and social media content. The Expand and Shorten modes are particularly useful for repurposing content across different channels and formats. There are no restrictions on commercial use in the terms of service.