How Human Does Your Writing Sound?
Check your writing's humanization score. Analyze sentence variety, tone, contractions, and more to see how natural your text reads.
Check Humanization in 3 Steps
Find out how human your writing sounds instantly
Paste Your Text
Copy any text you want to evaluate - AI-generated content, essays, emails, or any written content.
Analyze Humanness
The tool evaluates sentence variety, tone, contractions, personal pronouns, and informal markers in your text.
Get Your Score
Receive a humanization score from 0-100% with a breakdown by category showing what makes text sound human.
Why Use SupWriter's Humanization Score?
Understand what makes writing sound human and get actionable insights
Sentence Variety Analysis
Measures the variance in sentence lengths. Human writing naturally varies between short punchy sentences and longer complex ones.
Personal Voice Detection
Detects first-person pronouns (I, me, my, we) that indicate personal voice and authentic human expression.
Contraction Usage
Checks for natural contractions like don't, can't, and it's. Human writers use contractions frequently; AI often avoids them.
Informal Language Markers
Detects casual expressions, colloquialisms, and informal phrases that signal authentic human writing style.
Question Frequency
Measures how often questions appear in your text. Human writing tends to include more rhetorical and direct questions.
Instant Scoring
All analysis runs locally in your browser. No server requests, no sign-up, and completely free to use.
Frequently Asked Questions
More Writing Tools
Explore more free tools to analyze and improve your writing
AI Humanizer
Rewrite an AI-assisted draft so it reads naturally in your own voice.
Try it freeFree Humanizer
Try our free AI humanizer to make your text sound more natural and human-written.
Try it freeBest AI Humanizer Tools
Compare the top AI humanizer tools and find the best one for your writing needs.
Try it freeAI Humanizer vs Paraphraser
Understand the key differences between AI humanizers and paraphrasers for your content.
Try it freeAI Detection Checker
Check a draft before you submit. Sentence-level highlights from one scoring model. Results vary; no tool can guarantee a result.
Try it freeWriting Guides
Browse our collection of writing guides to improve your content and writing skills.
Try it freeCheck 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.
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.