Humanize AI text
before Grammarly
Make AI-assisted drafts read naturally in your own voice, then check the draft before you submit. Grammarly can flag human writing, including from non-native writers. No tool can guarantee a score.
Scores come from SupWriter's own AI detector, a pre-check based on one scoring model, not the detector your school or client uses. Results vary between runs, and no tool can guarantee a result. How we test.
What Grammarly checks, and what the editor does
A detector scores a draft. SupWriter rewrites it so it reads more naturally. Those are different jobs.
Try the editor
Paste an AI-assisted draft and rewrite it into clearer, more natural prose. Then read it before you submit.
Trusted by 9,000+ students, researchers, and content writers worldwide
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.
Why writers check Grammarly before they submit
Leading grammar and writing assistant used by millions, now with AI detection capabilities. Grammarly's detector shows AI probability scores and sentence-level analysis, though independent tests show lower accuracy than dedicated detectors.
Common checks before you submit
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
Engineered for
Your Own Voice
SupWriter rewrites sentence structure, rhythm and word choice while keeping your meaning.
Advanced Linguistics
Analyzes syntax, tone, and word patterns to remove robotic footprints.
Smart Restructuring
Restructures sentences while preserving your original meaning and intent.
Adaptive Learning
Updated so you can check a draft before you submit, including for unfair AI-detection false positives.
Ask AI to Fix Selection
Select any text and use AI to improve, fix grammar, shorten, lengthen, or customize with your own prompts.
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.
Trusted by 9,000+ Writers Worldwide
Students polish their writing to sound more natural, marketers improve content for better engagement and SEO, and businesses send emails that feel personal — not robotic.
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.
Other AI detectors
Kept detector pages stay linked. Retired ones point at the AI detection hub. Scores vary, and no tool can guarantee a result.
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FAQ