Now on the App Store

The AI humanizer that sounds like you.

AI drafts it, you own it. HumanFlow rewrites machine-drafted text so it reads like your writing — and scores it for AI, with the reasoning behind the number. Free plan, no card, no ads.

Try it free Download the app

Keeps your meaning
A score with its reasons
Three tones
No ads

Paste a draft

Your text

0 words / 300 per free preview

By using this you agree to our Terms and Privacy Policy. Your text is sent to our AI provider to produce the result and is never used to train models. Please don't paste confidential or other people's personal information.

Why AI drafts sound like nobody

A language model picks the most probable next word, over and over. That is what makes it a fast first-drafter, and it is also what flattens your writing into the same even, tidy prose everyone else's model produces. The result reads fine and sounds like no one.

You can hear it in the rhythm. Every sentence lands at roughly the same length. The transitions are all borrowed — "in today's fast-paced world", "it is important to note that". The specifics that make writing feel lived-in get smoothed into abstractions. Nothing is wrong, exactly. Nothing is yours either.

What HumanFlow does

Humanizer

Paste an AI draft and get a rewrite that varies its sentence length, drops the stock transitions, and keeps every claim you made. The meaning stays; the rhythm changes.

AI Detector

Check any text and see how machine-like it reads, with the confidence and the signals behind the number. Paid plans mark up every sentence — usually the flat ones worth rewriting anyway.

Three tones

Natural keeps your register and only loosens the rhythm. Casual moves closer to speech. Professional stays plain and direct — for work, and for academic writing that needs formal register without the padding markers dislike.

Private and simple

Sign in with Google and start. No ads on any plan, including the free one, and you can delete your account and its data whenever you want.

More detail on how the humanizer works.

Works with every AI model

If you can paste it, HumanFlow can humanize it.

HumanFlow rewrites the text, not the model behind it — so drafts from any AI assistant read naturally afterwards.

ChatGPTClaudeGeminiCopilotLlamaDeepSeekGrokMistralPerplexity

How it works

Paste your text

An AI first draft, an essay, an email — up to 1,500 words in one go on the free plan, which is a full undergraduate essay.

Pick a tone

Natural, casual or professional. The tone changes vocabulary and rhythm, not the argument you are making.

Read the result

You get the rewrite plus a detection score, its confidence and the signals behind it, so you can judge the result yourself.

What changes, and what doesn't

An illustration of the difference. Both paragraphs make the same argument; only one sounds like a person made it.

Before

The industrial revolution was a significant period of change. It transformed manufacturing processes and had a major impact on society. Many people moved from rural areas to cities during this time. This migration changed the structure of communities in important ways.

After

The industrial revolution gutted the village. Between 1750 and 1850 whole families walked off land their grandparents had farmed and into Manchester's cotton mills — and the communities they left behind never really recovered, because the people who leave first are the young ones.

Four sentences of near-identical length became one long one and one short. Abstractions became a place and a date range. That difference is most of what an AI detector measures — and it is also just the difference between dull writing and good writing.

What we don't claim

Most tools in this category advertise a bypass rate — 99%, 99.8%, "undetectable". We do not, for a reason you can check yourself: nobody can promise that. Detectors update without notice, they are calibrated differently from one another, and a claim about what Turnitin will say next month is not a claim anyone can stand behind.

So here is the honest version. HumanFlow helps your writing sound like a person wrote it, which often lowers detection scores, because natural writing is what detectors read as human. It is a writing aid. If you need a guarantee about a specific detector, no product can truthfully sell you one.

Our editorial policy sets out what we will and will not publish.

Are AI detectors even accurate?

Often not, and the research is blunt about it. Seven widely used detectors misclassified 61.22% of TOEFL essays — written by real people sitting an English exam — as AI-generated, while handling essays by US 8th-graders almost perfectly. OpenAI shut down its own detector in July 2023 after it correctly identified just 26% of AI text.

If you have been flagged for work you wrote, that context matters, and draft history is the strongest response you have.

What the accuracy research shows →Why human writing gets flagged →

How HumanFlow compares

We looked at seventeen popular humanizers — Undetectable.ai, WriteHuman, Humbot, BypassGPT, HIX Bypass, QuillBot, Grammarly, StealthWriter, Ryne, GPTHuman, Phrasly, Walter Writes, GPTinf, Netus AI, AI Humanize, Twixify and Humanize AI Pro. Here is where we differ, stated plainly.

Feature	HumanFlow	Most humanizers
Free single scan	1,500 words — a full essay in one go	80–250 words, then a paywall
“Undetectable” claims	None — nobody can promise that	“99% bypass rate”, “undetectable”
Detection view	The score, its confidence and the signals under it	One overall percentage
Feature gating	One paid feature — the sentence map. The rest is volume	Best modes locked to top tiers
Ads	None, including the free plan	Ads or upsells on free tiers

Tool-by-tool comparisons →

Start free

The free plan gives you 2,000 humanizer words and 10,000 detection words a month, and it takes a full 1,500-word essay in a single scan — where most tools cap free users at 80 to 250 words. Paid plans start at $18 a month; they raise the volume and add the sentence map, which marks up every line of your text.

See all plans

On the App Store

Both halves, in your pocket

The rewriter and the detector — the same two that run on this site — in an app you can paste into between classes. Check a draft before you hand it in, not after somebody else has.

2,000 humanizer words and 10,000 detection words a month, free
Up to 1,500 words in a single rewrite — a whole essay, not a fragment
No card to start, and no ads on any plan

Download on the App Store

The HumanFlow app on iPhone, on the rewrite screen: “Make it sound like you”, above buttons to try a sample or paste from the clipboard.

The same app showing a detection result: 99% AI, labelled “Likely AI-written”, with a button to humanize the text.

Common questions

What does an AI humanizer actually do?

It rewrites text so it reads the way a person writes: varied sentence length, more specific word choice, and fewer stock transitions. HumanFlow keeps the meaning of your original and changes how it sounds.

Will HumanFlow make my text undetectable?

We do not claim that, and we would not trust a tool that does. AI detectors change without notice and disagree with each other on identical text. Writing that varies its rhythm and carries specific detail does tend to score lower, because that is what detectors read as human — but nobody can promise a particular result from a particular detector.

Is HumanFlow free?

There is a free plan with 2,000 humanizer words and 10,000 detection words a month, and it handles a full 1,500-word essay in a single scan. No card required. Paid plans start at $18 a month.

Are AI detectors accurate?

Often not. In peer-reviewed testing published in Patterns, seven detectors misclassified 61.22% of essays by non-native English speakers as AI-generated. OpenAI withdrew its own detector in July 2023 after it identified only 26% of AI text correctly. A detection score measures how predictable writing is, not who wrote it.

Does it change what my text means?

It is built not to. The rewrite targets phrasing, rhythm and word choice while leaving your claims intact. Read the output before you use it — that is true of any rewriting tool, and it is how you catch the occasional case where a nuance has shifted.

What happens to the text I paste in?

It is sent to our AI processing providers over encrypted connections solely to produce your result. We show no ads, we do not sell personal data, and you can delete your account and its data at any time from the app or by email.

Which platforms does HumanFlow run on?

iOS, on the App Store today, and here on the web. You sign in with Google, so your work stays tied to your account.

Write in your own voice.

HumanFlow helps your words sound like you — it doesn't promise to defeat any detector. Free plan, no card, no ads.

Download on the App Store