SupWriter is a writing tool. Follow your school's or employer's rules on AI use.
AI Detector Editor — detect, then rewrite
Paste any text, get an AI score, see which sentences look AI-generated — then fix them in the same editor. Detection plus rewriting in one tool.
No credit card required · 300 free credits
Humanize AI Writing in 3 Simple Steps
Turn an AI-assisted draft into clear, natural writing in your own voice, then check it before you submit.
Your Text
Paste your AI-generated text here
Paste Your AI-Generated Text
Copy any content — assignments, blog posts, or AI-generated text.
Result
Check AI Score
See how much of your text is flagged as AI-written by detection systems.
Edit or review selection
Use AI to do more
Humanize & Improve selection
Rewrite the draft so it sounds like you. Select any text to improve it, fix the grammar, shorten it, or lengthen it.
Benefits
Why writers pick this over a one-click tool
Sentence-level AI score
See which sentences look AI-generated, not just a blanket percentage. Fix the flagged ones inline.
Labels from one score
One scoring model produces the score. Sentence highlights and the labels on it are mapped from that score.
One-click fix
Humanize the flagged text without leaving the editor. Re-check the score on the rewritten version.
Batch check
Check essays up to 5,000 words in a single run on the Ultra plan.
Check a draft before you submit
Detectors such as GPTZero, Turnitin, and ZeroGPT estimate whether a draft looks AI-written. They can also flag human writing.
SupWriter includes an AI detector so you can check a draft before you submit. It is a pre-check based on one scoring model, not the detector your school or client uses. Results vary by detector, text length and topic, and no tool can guarantee a result. How we test AI detectors
Use the built-in AI detector (free on paid plans) to review a draft before you submit. A score is an estimate, not a guarantee.
What SupWriter includes
See how SupWriter helps an AI-assisted draft read in your own voice, stay clear for non-native writers, and get checked before you submit.
| Features | SupWriter |
|---|---|
| Natural voice | Your own |
| Languages | 50+ |
| Built-in AI detector | One scoring model |
| Fix selection | |
| Free plan | 300 words once |
| Buy extra credits |
Reviews
What our users say
What writers say about SupWriter
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.
It's so great and I love this app. Everyone should use it. It helped me pass my essay!
What impressed me most is how seamlessly SupWriter polishes my drafts. My clients noticed the difference in quality and tone immediately.
Absolutely wonderful. The best AI humanizer I've used, especially for scientific writing.
This tool lets me do so many things faster, and its features are genuinely useful.
Really good. I didn't expect it to be this great. It genuinely enhanced my writing. Give it a try.
This product is so good. I'll choose it over and over again. It has my heart. ❤️
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.
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.
It was amazing. I upgraded, and since then my work has consistently scored high marks.
The best humanizer ever.
It was great, especially in a foreign language. It helped the adjectives come out smoother than I expected!
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.
Precisely written and a very nice app. I recommend everyone give it a try.
I was amazed to see the AI-flagged text identified so accurately. It really helps crack down on AI interventions.
My professor commended the uniqueness of my essay after I used SupWriter to make it sound natural. Strongly recommended for students!
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!
It's been a great tool to use, and very helpful.
My experience with the AI detector was great. The interface is simple and easy to navigate, and results came back quickly with useful detail.
This experience has been amazing, and the service is extremely helpful.
My experience was amazing. SupWriter is very easy to use, and it actually works!
Impressed by the quality, and cheaper than other platforms.
SupWriter is great. It helps me become a better writer and a better student overall.
FAQ
AI Detector Editor — common questions
Other editors
Explore the rest of the workspace
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Fix grammar, spelling, punctuation, and clarity in one editor.
OpenThe full Advanced Editor
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Open workspace