Fix grammar in any app.
Select your text, click the green tick, and get it back with the grammar and spelling fixed. Right where you are writing. No copying, no pasting, no new window.
Works in the apps you already use, and anywhere else you can select text
How it works
Three steps. No new window.
GrammarDeck lives quietly in your menu bar, your tray, your keyboard or your browser, and shows up only when you ask.
Select your text
In Mail, Slack, Word, a web page or any other app. A sentence or a whole email, up to 10,000 characters.
Click the tick
A small green tick appears next to your selection. Click it, or press the shortcut.
⌃⌥GAccept the fix
See every change, struck out in red and added in green. Click Accept and your text is replaced.
Why GrammarDeck
Built to stay out of your way
A grammar checker you never have to open. It fixes your mistakes and leaves your voice alone.
See exactly what changed
No mystery rewrites. Every fix is marked, so you can check it in a glance before you accept.
Keeps your voice
Fixes mistakes only. Your meaning, tone, line breaks and emoji stay as you wrote them.
Fixes in place
No copying into another window. Accept, and the fixed text replaces yours where it was.
Understands the sentence
An AI model reads the whole sentence, so it catches mistakes that simple spell checkers miss.
Short or long
10k characters per check
One account, every device
Sign in on your Mac, your PC, your phone and your browser. Your plan follows you everywhere.
A shortcut for everything
Keep your hands on the keyboard. One shortcut checks the selected text on every computer.
CtrlAltG on Windows and Linux
Everywhere you write
On your computer, your phone and your browser
One GrammarDeck account works on all of them. Pro bought once works everywhere.
macOS
Menu bar app
Select text in any app. A small green tick appears at the end of it. Click the tick, or press the shortcut, and the fix shows right next to your text.
Windows
Tray app
Select text in any app and press the shortcut. GrammarDeck shows the fix next to your text, and Accept pastes it back.
Linux
Tray app
Select text and press the shortcut. Works in desktop sessions that run on Xorg.
iPhone and iPad
Keyboard
Type with the GrammarDeck keyboard as usual. Before you send, tap ✓ Check, then tap a fix or Accept all.
Android
Keyboard
Switch to the GrammarDeck keyboard, write your message, and tap ✓ Check to see the fixes before you send.
Chrome, Edge and Firefox
Browser extension
Select text on any web page. Click the GrammarDeck button that appears, use the right-click menu, or press the shortcut. Accept replaces the text in boxes and editors; Copy works everywhere.
On your phone
A keyboard that checks before you send
Type with the GrammarDeck keyboard on iPhone or Android, in WhatsApp, Messages, Gmail or any other app. Tap ✓ Check, then Accept all, and the message is corrected in place.
- Sends text only when you tap the button
- Never checks password fields
- Does not record what you type
In your browser
Fix any web page, from Gmail to LinkedIn
The extension for Chrome, Edge and Firefox adds a small GrammarDeck button next to the text you select. Accept replaces the text in boxes and editors; Copy works on any page.
- Right-click menu and AltShiftG
- Reads the page only when you ask
- No access to password boxes
Privacy first
Checked, then forgotten.
Your writing is yours. GrammarDeck sees your text only when you ask for a check, and forgets it the moment the fix comes back.
How we handle your dataNever stored
Text is checked in memory and dropped. We count your checks, never what they said.
Never used to train AI
Your writing is not used to train our models or anyone else's.
Only when you ask
Nothing is read in the background. No keylogging, no screen reading, no ads, no data sales.
Made for
Whoever you write for, get it right
Small mistakes get noticed. GrammarDeck catches them before anyone else does.
At work
Emails, Slack replies and reports that read as careful as you are.
revert back reply
Students
Assignments, applications and messages to professors, without the red pen.
Me and my friend has My friend and I have
English as a second language
Write in English with confidence. See exactly what changed, and learn as you go.
He don't knows He doesn't know
Developers
Clean commit messages, pull requests, tickets and docs, right in your browser.
Fixed a issue were Fixed an issue where
Pricing
Free to start. Fair when you need more.
Free gives you 5 credits a day. Pro is ₹200 a month in India, for people who write all day.
Free
For a few important messages a day.
₹0 forever
No card, no trial that runs out. Free for as long as you like.
Get started free- 5 credits a day, up to 100 a month
- Grammar and spelling fixes, and tone rewrites
- Every app, keyboard and browser
- One account on all your devices
Recommended
Pro
For people who write all day.
₹200 a month
Or ₹2,000 a year and save 17%.
Get Pro- 5,000 credits every month, up to 1,000 a day
- Need more? Add 1,000-credit packs any time
- Every app, keyboard and browser
- Pro on every device you sign in on
- Cancel any time
Pay with UPI AutoPay or card through Razorpay. Renews by itself; cancel any time from your account page.
Secure by default
Encrypted connections everywhere. Payments are handled by trusted payment providers, so we never see your card or bank details.
14-day refund
Not for you? Ask within 14 days of your first payment for a full refund. No questions.
Independent
Made independently in Kerala, India. No investors, no ads and no data sales. Just a careful tool for people who write.
Questions
Good questions, honest answers
What is GrammarDeck?
A small app that fixes grammar and spelling in whatever app you are writing in. Select your text, click the green tick or press a shortcut, and GrammarDeck shows the corrected text right next to it. Click Accept and it replaces your text.
Which apps does it work in?
On a computer, almost any app where you can select text: Mail, Outlook, Slack, Teams, Word, Notion, Notes, your browser and more. On a phone, the GrammarDeck keyboard works in every app you can type in.
Do you keep or read what I write?
No. Your text is sent only when you ask for a check. It is checked in memory and dropped as soon as the fix comes back. We count how many checks you make, never what they said, and your text is never used to train AI.
Will it rewrite my text?
No. GrammarDeck fixes mistakes and leaves the rest alone. It keeps your meaning, your tone, your line breaks and your emoji. Every change is shown before it is applied, so you stay in control.
Which languages does it support?
English for now. Support for more languages is planned.
Is there a free plan?
Yes. The Free plan gives you 5 credits a day and up to 100 a month, with no card needed. The daily count resets at midnight UTC (5:30 am in India), and the monthly one on the 1st.
What is a credit?
One check or one tone rewrite of up to 50 words costs 1 credit. Longer text costs 1 credit for every 50 words it starts, so 120 words cost 3. The app shows the cost before it checks long text.
More in the help centre, or write to support@grammardeck.com.
Write without second-guessing.
Start free with 5 credits a day. No card needed.