New MCP & API
Claude
OpenAI

Make AI text sound human and undetectable.

SupWriter rewrites ChatGPT, Claude, Gemini, DeepSeek & Grok output into natural, human writing — then checks it against the AI detectors that matter.

No credit card required

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Loved by 10,000+ writers worldwide

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Trusted by 10K+ students, researchers & content writers worldwide

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Stanford University logo
Vellore Institute of Technology logo
UC Berkeley logo
Thammasat University logo
Harvard University logo
Ateneo de Manila logo
Princeton University logo
SRM Institute of Science & Technology logo
Columbia University logo
The University of Western Australia logo
University of Oregon logo
University of Leeds logo
Princeton University logo
SRM Institute of Science & Technology logo
Columbia University logo
The University of Western Australia logo
University of Oregon logo
University of Leeds logo

Built for Every Writer

From academic papers to business communications, SupWriter transforms AI-generated text into authentic writing that reflects your voice. Our humanizer adapts to your industry and use case, delivering natural results every time.

Students

Write naturally, submit confidently

Transform your AI-assisted drafts into authentic academic writing. SupWriter helps you maintain your unique voice while ensuring your essays, research papers, and assignments read naturally and pass institutional AI screening tools.

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SEO & Content Teams

Scale content without the AI footprint

Produce high-volume content that reads like it was crafted by your best writers. SupWriter transforms AI drafts into engaging, human-quality copy that builds reader trust and aligns with search engine quality guidelines.

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Business Professionals

Sound polished, not robotic

From client proposals to internal memos, ensure every business communication reflects your professional voice. SupWriter refines AI-generated text so your emails, reports, and presentations connect authentically with your audience.

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Educators & Trainers

Create engaging course materials

Develop lesson plans, training guides, and educational content that resonates with learners. SupWriter helps you transform AI-assisted materials into warm, engaging resources that feel personally crafted for your students.

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Legal & Compliance

Precision meets authenticity

Draft contracts, briefs, and legal documents that maintain precision while reading naturally. SupWriter ensures your AI-assisted legal writing preserves technical accuracy without sacrificing the authoritative tone clients expect.

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Researchers & Scholars

Publish with confidence

Refine your research papers, grant proposals, and academic publications to meet rigorous scholarly standards. SupWriter helps ensure your AI-assisted writing maintains academic integrity while conveying your expertise clearly.

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Explore more solutions for content creators, freelancers, and professionals.

Everything in one tool

Write like a human. Pass every detector.

Humanize, detect, paraphrase and grammar-check in one workspace — plus an API and MCP connector to take it everywhere else.

Training samples
1.2M+

Training samples

Avg. rewrite
<5s

Avg. rewrite

Bypass rate
99%

Bypass rate

Monthly users
50K+

Monthly users

Advanced Editor

Everything in one workspace

Humanize, paraphrase, grammar-check and detect AI on one page — with your history and credits always in view.

AI Detection

Scored against 12 detectors

A sentence-level read on how likely Turnitin, GPTZero, Originality & others are to flag your text.

Humanization

Reads like a person wrote it

Rewrites ChatGPT, Claude & Gemini output to match your tone — with Beast Mode for a maximum-strength pass.

CasualFormalAcademicBeast Mode
Multilingual

100+ languages

Humanize, paraphrase and grammar-check in over 100 languages — from English and Hindi to Japanese and Arabic.

Paraphraser

Five ways to rephrase

Rewrite any sentence while keeping its meaning — pick the mode that fits your audience.

Grammar

Three grammar modes

Basic, Thorough or Style — from a quick spell-check to a full readability rewrite.

Content types

16 content types

Tuned for essays, emails, blog posts, research papers, cover letters and more.

MCP & API

Use SupWriter inside your AI tools

Humanize, detect, paraphrase and grammar-check without leaving the apps you already use.

  • Add SupWriter as an MCP connector in Claude & ChatGPT
  • Use it in Cursor, VS Code & any MCP client
  • Or call the REST API from your own code
Claude
OpenAI
Inline AI

Fix any selection inline

Highlight any sentence to improve it, fix grammar, or shorten — right where you write.

Tested and Proven Across All AI Detectors

We test every rewrite against leading detection tools like GPTZero, Turnitin, ZeroGPT, and more. Our system is updated weekly to adapt to new detection methods and eliminate flagged patterns.

ZeroGPT logo
ZeroGPT
Copyleaks logo
Copyleaks
Turnitin logo
Turnitin
QuillBot logo
QuillBot
GPTZero logo
GPTZero
GrammarlySaplingOpenAIClaudeGeminiGrok

99%success rate across all major detection platforms

SupWriter vs. Other AI Humanizers

See why SupWriter consistently ranks as the most effective humanizer for avoiding AI detection, preserving tone, and optimizing readability.

FeaturesSupWriterOther HumanizersFree Tools
Human Score99%+85%90%
Turnitin
GPTZero
Originality.ai
Multilingual Support100+ LanguagesEnglish Only5 Languages
Built-in AI Detector
Plagiarism-Free Output
Meaning PreservationHighMediumMedium
Processing SpeedFast (<25s)Slow (2+ min)Medium (1 min)
Fix Selection
Free Trial300 Words100 WordsNo Trial
Buy Extra Credits

Reviews

What Our Users Say

Thousands of writers trust SupWriter every day

I've been using SupWriter for weeks, and it's become essential to my academic writing and research workflow. As a Ph.D. student in environmental law, I'm constantly drafting, refining, and translating complex texts, and SupWriter makes the whole process far more efficient and less stressful.

HE
Henrry
Ph.D. Candidate

It's so great and I love this app. Everyone should use it. It helped me pass my essay!

BH
Braxton H.

I really like this app. It rephrases my text so well that Turnitin doesn't pick it up. Pretty amazing.

CD
Chyenne D.
Student

What impressed me most is how seamlessly SupWriter polishes my drafts. My clients noticed the difference in quality and tone immediately.

BL
Brandon L.
Freelancer

Absolutely wonderful. The best AI humanizer I've used, especially for scientific writing.

PB
Phoebe B.
Student

This tool lets me do so many things faster, and its features are genuinely useful.

KA
Karima

Really good. I didn't expect it to be this great. It genuinely enhanced my writing. Give it a try.

CA
Chris A.
Researcher

This product is so good. I'll choose it over and over again. It has my heart. ❤️

Rachel A.
Rachel A.
Student

The Fix Selection feature is a game changer. I can select any text and improve it, fix the grammar, or make it shorter, and my content workflow has never been faster.

AM
Aisha M.
Content Writer

Excellent service, really helpful for job applications, and it even has an AI detector. I'd highly recommend it to students, professors, and writers. An amazing writing tool.

SW
Shania W.

It was amazing. I upgraded, and since then my work has consistently scored high marks.

EH
Enzo H.
Student

The best humanizer ever.

Nikolay
Nikolay

It was great, especially in a foreign language. It helped the adjectives come out smoother than I expected!

Christina P.
Christina P.
Writer

I'm on the Ultra Monthly plan and bought $20 in extra credits. This platform is super good, and I'm planning to switch to the Yearly plan soon.

RO
Ron
Ultra plan user

Precisely written and a very nice app. I recommend everyone give it a try.

RS
Riya S.
Student

I was amazed to see the AI-flagged text identified so accurately. It really helps crack down on AI interventions.

Radhakrishnan
Radhakrishnan

My professor commended the uniqueness of my essay after I used SupWriter to make it sound natural. Strongly recommended for students!

MD
Marco D.
Student

The website is fantastic. It's clean, modern, and visually appealing. Navigation is intuitive, pages load fast, and everything works well on desktop and mobile. A smooth, enjoyable experience. I'm really impressed!

KO
Korsmann
Student

Really, the only one that passed the YouScan detector.

MF
Mariana F.
Teacher

It's been a great tool to use, and very helpful.

AD
Adrianne

My experience with the AI detector was great. The interface is simple and easy to navigate, and results came back quickly with useful detail.

KA
Kareem
Student

This experience has been amazing, and the service is extremely helpful.

MA
Marshall

My experience was amazing. SupWriter is very easy to use, and it actually works!

DF
Domenico F.
Student

Impressed by the quality, and cheaper than other platforms.

ST
Steve

SupWriter is great. It helps me become a better writer and a better student overall.

KL
Kal
Student

FAQ

Common questions about SupWriter

SupWriter uses advanced AI algorithms trained on millions of text samples to rewrite your content. It analyzes patterns that AI detectors flag and restructures sentences to sound more human while preserving your original meaning and intent.
Get Started Today

Ready to Write with Confidence?

Join thousands of students and researchers who trust our AI-powered rewriting tool to create authentic, undetectable content.

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