Humanizer Chrome Extension

Grammar and humanizer everywhere you type.

No tab to switch to, nothing to paste. Fixes appear under the words they belong to, and AI drafts get rewritten right in the box you are already typing in.

  • Starts marking up your writing before you sign in
  • Chrome, Edge, Brave and Arc
Toteam@acme.com
Vendor recommendations, next steps

Hi team, I wanted to reach out and touch base regarding the recomendations the vendor have sent over. I have reviewed each of them in detail and believe there are several key takeaways we should discuss before the board meeting on Thursday. Please advise at your earliest convenience.

Style

regarding

about
Send

Two jobs. One extension.

A grammar checker and a humanizer are normally two tools. This is both, in the box you type in.

01As you type

It fixes spelling and grammar

Misspellings, grammar mistakes and clunky phrasing get underlined where you wrote them, each in its own colour. Click one to take the fix. Signed out it still marks what it finds, in grey, so you can watch it work on your own writing first.

Their team have sent over the recomendations and they utilize the same approach.

SpellingGrammarStyle
02On demand

It humanizes AI text

Highlight a paragraph, or leave nothing highlighted to take the whole box. The rewrite comes back with a human score and drops straight into the page.

It is imperative that we leverage our core competencies.

The thing that matters is playing to what we are already good at.

Replace textCopyHuman score 98%

Both work in Gmail, Outlook, LinkedIn, Notion, Slack and every other text box on the web.

The #1 Grammarly alternative

Everything Grammarly does. Plus your AI writing.

WriteHuman underlines your spelling and grammar in the same apps Grammarly does, for $18/mo instead of $30/mo. It also does the one thing Grammarly cannot: take a draft you wrote with AI and rewrite it so it reads like you wrote it yourself.

Grammarly does this. So do we.

It fixes spelling and grammar as you type

Everything you currently use Grammarly for still happens, in the same places, the same way.

  • Misspellings, grammar mistakes and clunky word choices get underlined while you type
  • Click an underline and it fixes the word for you
  • Runs in Gmail, Outlook, LinkedIn, Notion, Slack and every other text box
  • Add your own words, like names and jargon, so they stop getting flagged
  • Turn it off on one site, or pause it for an hour, from the toolbar
  • Never touches password, card number or search boxes

Switching does not cost you any of this.

Grammarly cannot do this.

It makes AI writing sound human

Fixing commas and word choice does not change the sentence rhythm that makes AI writing sound like AI writing. That is what gets rewritten here.

  • Rewrites AI text so it sounds like a personHighlight a paragraph you wrote with ChatGPT, hit Humanize, and press Replace text. The rewrite goes straight back into the email or doc you were already in.
  • Tells you the score before you send itEvery rewrite comes back with a human score out of 100, so you know how it reads instead of guessing.
  • Rewrites a highlight or the whole boxSelect one paragraph to rewrite only that, or select nothing and it takes the entire field. Either way the result lands back where you were already typing.

HumanizerBench: AI-detector checks the rewrite passed

WriteHuman89.1%

Grammarly0.0%

August 2026 HumanizerBench cycle: 33 samples per tool across 396 tests, methodology v1.2.0. HumanizerBench is a public monthly benchmark published by WriteHuman. Pricing read from Grammarly's plans page in June 2026. See the full head-to-head.

The same AI humanizer, loved by millions

The same engine as our website, iOS and Android apps. Thousands of five-star ratings and the top spot on HumanizerBench.

4.6/ 5

6,583 five-star reviews on Google Play

56,583
41,700
3537
2174
187

91.2% rate WriteHuman 4 stars or higher.

100K+ downloads

It generates the text so perfectly even a human won’t question it

Umeh C.Google Play

It’s great. That’s what I need as a blogger.

Ogu N.Google Play

In my corporate world, it helps me a lot in generating my proposals, presentations, and even my short speech in just a minute. I now find it a big help in my job, and this really made everything easy for me.

ChieianskyApp Store

Where it runs

It runs inside Gmail, Outlook, LinkedIn, Notion and Slack

WriteHuman is not another website you paste into. It attaches to the text box you are already in, so the spelling, grammar and style checks and the AI humanizer are both one click from wherever the writing is actually happening. There is nothing to switch on per site and no list of supported apps to check before you install it. These are the apps people install it for most, and what it does inside each one.

Gmail
Outlook
LinkedIn
Notion
Slack
X
WordPress
Everywhere else

The one most people install it for

Gmail

Compose windows, replies and forwards, and the full-screen composer.

Tidy a reply before you send it, or drop a whole AI-drafted email into a voice that sounds like you. Highlight the paragraph you want changed, or highlight nothing at all and take the entire message, then press Replace text and the rewrite lands back in the compose window you were already in.

WriteHuman also hides Gmail’s own duplicate underlines while it is running, so you are reading one set of squiggles instead of two that disagree about the same sentence. The checks start marking things up here before you sign in to anything, as a preview. Signing in is what opens the corrections themselves, and the humanizer with them.

Handles: Compose windows, replies and forwards, full-screen drafts.

To team@acme.com

Hi team, I wanted to reach out and touch base regarding the recomendations the vendor have sent over before Thursday.

style

regarding

about
Send

Gmail compose. A style suggestion, open under the word it belongs to.

  • Outlook on the web

    Outlook gets purpose-built handling rather than the generic treatment, including quieting the Microsoft Editor overlay so two checkers are not marking up the same sentence in two different colours. This covers the browser version at outlook.com and outlook.office.com. The desktop application is a native program rather than a web page, so no browser extension can reach inside it, ours included.

    Handles: New mail, replies and forwards, long internal updates.

  • LinkedIn

    Posts, comments, connection notes and the message composer. Long-form posts drafted with AI are the obvious reason the humanizer is there, because a post that reads like a template gets scrolled past. The writing checks run on everything else too, including the two-line comment you dash off between meetings and the note you attach to a connection request.

    Handles: Posts, comments, connection notes, direct messages.

  • Notion

    Docs, wiki pages, meeting notes and the text inside database rows. WriteHuman attaches to the same rich editor Notion is built on, so suggestions appear underneath the words they belong to instead of in a side panel you have to keep glancing at. Slash commands, toggles and nested blocks all keep working normally while it is running.

    Handles: Pages, sub-pages, database notes, comments.

  • Slack

    The message composer, thread replies and canvases. This is where the humanizer pays for itself on the update you have already rewritten three times: highlight it, rewrite it, drop it back into the composer, then post it to the right channel this time. The writing checks run in threads and direct messages as well as in main channels.

    Handles: Channel messages, threads, direct messages, canvases.

  • X

    The composer, replies and saved drafts. Short text is where a stiff AI cadence shows up fastest, because there are not enough words for it to hide in: one flat, evenly weighted sentence reads as machine-written on its own. Humanizing a short post takes about as long as reading it back.

    Handles: Posts, replies, quote posts, drafts.

  • WordPress and most CMSes

    The block editor, the classic editor and the plain text areas that older publishing tools still use. Draft the post, clean up the spelling, humanize the paragraphs that came out of a model and publish, without a round trip through another tab and another paste. The same is true of most other publishing tools: if the editor is a real text box on a web page, it is covered.

    Handles: Block editors, classic editors, excerpt fields, plain text areas.

Anywhere else you type

Support is the default rather than a list somebody maintains. WriteHuman attaches to standard multi-line text boxes and to the rich editors most modern web apps are built on, which is why the internal tool you live in, the support queue, the applicant tracker and the CMS nobody has touched in years are all already covered. If it is a real text box on a web page, the extension is in it.

Two limits worth knowing before you install. Google Docs is the exception: it paints your text onto a canvas element instead of laying it out as text the browser can address, so there is nothing there for any extension to underline or replace. And the extension checks English, working out the language of a block and staying quiet on the rest. The humanizer on the website covers 40+ languages, so anything you can paste has somewhere to go, and the standalone AI detector is there for checking a piece of writing on its own.

Handles: Text areas, contenteditable fields, and the common rich-text editors.

Setup

How to install it and start using it

Two clicks of setup and then nothing to learn. There is no tone picker to get right and no mode to choose before it does anything useful. The writing checks start the moment a page loads, and signing in is what opens the corrections and the humanizer.

The order matters less than it looks. Install it, forget about it, and the first time you notice it will be a grey underline under a word you have been misspelling for years. That mark is the part that costs nothing: it is the fix underneath it that asks you to sign in.

Add to Chrome. It's free.

Already installed? Connect your account

  1. 1

    Add it to Chrome

    One click from the Chrome Web Store, then pin it from the puzzle-piece icon in the toolbar so the panel is always one click away. There is nothing to configure and no onboarding to sit through. If you had tabs open before installing, reload them: a page that loaded before the extension existed has no extension inside it, which is far and away the most common reason someone thinks it is not working.

    Reload the tabs you already had open.

  2. 2

    Write exactly like you did yesterday

    Nothing about how you work changes. Open Gmail, open Notion, start typing. Misspellings, grammar mistakes and clunky phrasing get underlined underneath the words they belong to, and you are free to ignore every one of them. Nothing pops up over what you are writing and nothing takes the cursor away from you. Before you sign in this runs as a preview: the checks still read your writing and mark what they find, in a neutral grey, so you can watch it work on your own words first.

    Their team have sent over the recomendations and they utilize the same approach we do.

    SpellingGrammarStyle

    Signed in: underlines only, a colour per category. No popup until you ask for one.

    Marks what it finds before you sign in.

  3. 3

    Sign in and the underlines open

    Signing in turns the grey preview marks into the live palette, a colour per category, and opens the card that holds the actual correction. Click an underlined word, the card opens beneath it, and taking the fix replaces the word where it sits with your cursor left where it was. If a word is right and we are wrong, which happens with names, product names and deliberate spellings, add it to your dictionary once and it stops being flagged everywhere you write.

    Your dictionary rides Chrome’s own sync across machines.

  4. 4

    Humanize a draft without leaving the page

    Select the paragraph that came out of a model and open the panel from the floating button, or select nothing and it takes the whole box. The rewrite comes back with a human score out of 100, and Replace text drops it straight into the field you were already writing in. Copy is there too if you would rather paste it somewhere else. Humanizing draws on your WriteHuman plan and credits, the same ones the website uses, so it runs on the account you connected a step ago.

    Uses your existing plan. No separate extension subscription.

One account

One plan covers the website, the extension and the phone apps

The extension is not a separate product with a separate bill. Sign in once and it draws on the same plan and the same credits as everything else with WriteHuman on it, so nothing is metered twice and there is no extension wallet to top up. Here is what each way in is for.

One balance
Humanizing from the extension draws on the same plan and the same credits as the website and the phone apps. There is no separate extension allowance to run out of, and nothing is counted twice.
One dictionary
Words you add on your work laptop are already unflagged on your home machine, because the dictionary sits in Chrome’s own synced extension storage and travels with your Chrome profile instead of being stranded in one browser window.
One bill
A single subscription covers the website, the extension and the phone apps. Change it or cancel it in one place, and see what each plan includes on the pricing page.

Privacy and control

What it can read and what it cannot

It reads the text in the field you are working in, because there is no way to check the spelling in a sentence without reading the sentence. That text goes to WriteHuman over HTTPS, gets checked or rewritten and comes back to the same box it came from. Everything else about the page stays where it is. Here is the whole thing in plain terms.

What leaves the page

Sent over HTTPS to WriteHuman, checked or rewritten, and returned.

  • The contents of the text box you are writing in, so the spelling, grammar and style checks have something to check.
  • The words you selected when you asked for a rewrite, or the whole box if you had not selected anything.
  • Your sign-in token, once you connect an account, so a rewrite and the deeper checks that come with an account know whose plan and credits to draw on.
  • All of it over HTTPS, and back into the same field it left.

What never leaves it

Not filtered out by a rule. Never reachable in the first place.

  • Passwords, card numbers, usernames and search terms. WriteHuman only attaches to multi-line text boxes and rich editors, and every one of those fields is a single-line input, so they are out of reach because of how it attaches rather than because of a blocklist somebody has to keep updated.
  • Fields marked read-only, and anything the page has labelled with a search role.
  • The rest of the page you are on, your other tabs, your history and your inbox as a whole. It sees the box you are typing in, not the app around it.
  • Off switches that already exist

    A master switch turns the whole thing off. A per-site switch turns it off for the site you are on and leaves it running everywhere else. Both sit in the toolbar popup, one click from wherever you are. The popup also opens the panel, and that is where the rest lives: pause this site for 30 minutes, an hour, two hours or until tomorrow, choose whether suggestions show as underlines with cards, underlines only or just a count on the icon, and switch individual categories off. If the floating button itself is in the way, tuck it into the edge of the window and the checks carry on underneath.

  • Your dictionary is yours

    Names, jargon, product names and deliberate spellings go into a personal dictionary held in Chrome’s own synced extension storage, so a word you stop flagging on one machine stays unflagged on the next machine you use Chrome on. Take a word back out later and it goes back to being checked like any other.

  • It starts checking before you sign in

    The checks run signed out as a preview: they mark what they find in grey, and the correction itself stays shut until you sign in. That way you get to see it working on your own writing first. Signing in opens the fixes, the full colour palette and the humanizer, which is the part that draws on your plan.

  • Incognito stays off unless you say so

    Chrome disables every extension in Incognito windows by default, and we do not ask you to change that. If you want it there you turn it on yourself at chrome://extensions, and you can turn it back off the same way.

WriteHumanToolbar popup
Enable WriteHuman
On this site
Open dashboard

In the panel: pause suggestions

For 30 minutesFor 1 hourFor 2 hoursUntil tomorrow

The toolbar popup holds the two switches. Pause and the display settings are one click further in, in the panel it opens.

The complete version, in the language lawyers prefer, is in the privacy policy.

Before you install it

Is the extension free?

Installing it is free, and the checks start running before you sign in: they mark what they find in grey so you can see it working on your own writing first, with the corrections held back until you have an account. Signing in opens those fixes, and humanizing needs an account too because it draws on the same plan and credits as the website. There is no separate extension subscription and no separate extension wallet.

Does it work in Google Docs?

Not currently. Google Docs draws your text onto a canvas element instead of laying it out as editable text, so there is nothing on the page for any extension to underline or replace. Gmail, Outlook, Notion, LinkedIn, Slack and the rest all work normally.

Which browsers are supported?

Chrome, and the Chromium browsers that install Chrome Web Store extensions: Edge, Brave and Arc.

Can it read my passwords or card details?

No. The extension attaches only to multi-line text boxes and rich editors. It never attaches to a single-line input field, which is what passwords, card numbers, usernames and search boxes are, so those are structurally out of reach rather than filtered out by a rule that could be misconfigured. Fields marked read-only and search roles are skipped too.

Can I turn it off on a particular site?

Yes, and it is one click from the toolbar popup, which holds a master on/off switch and a per-site switch for the site you are on. Open the panel from there and you can pause the site instead, for 30 minutes, an hour, two hours or until tomorrow. If it is only the floating button you want gone, tuck it into the edge of the window and the checks keep running.

Does it work in Incognito?

Only if you allow it. Chrome disables every extension in Incognito windows by default. If you want it there, open chrome://extensions, find WriteHuman, and turn on "Allow in Incognito".

Do I need a separate subscription for the extension?

No. Sign in once and the extension uses the same account, the same plan and the same credits as writehuman.ai. Your personal dictionary rides Chrome’s own sync, so words you added on one machine are already there on the next machine you use Chrome on.

Which languages does it check?

The extension checks English. It detects the language of what you are writing and stays out of the way on everything else. The humanizer on the website covers 40+ languages.

I installed it but nothing is happening.

Two things fix almost every case. First, reload any tab you already had open before installing, because a page loaded before the extension existed has no extension in it. Second, click the puzzle-piece icon in the Chrome toolbar and pin WriteHuman so you can reach the panel. If it is still quiet, check that the site is not switched off in the popup.

Put it in the tab you already have open

Free to install, and it starts marking up your writing before you sign in. Connecting your account is what opens the corrections and the humanizer.