How to fix grammar in Gmail automatically

A short guide, updated November 2026

Gmail's built-in spelling and grammar checks underline mistakes and wait for you to click each one. If you'd rather have mistakes fixed for you before you hit Send, a browser extension can do it in place.

Steps

Add Caret to Chrome from the Chrome Web Store. There's no account to create.
Open Gmail and click Compose, or reply to any email. If Gmail was already open, Caret starts on its own; if nothing happens, refresh the tab once.
Write your email as usual and pause for about a second. Caret corrects the sentence you just wrote, in place.
A small note shows what changed. Click Undo, or press Ctrl+Z, if you want your original back.

Fix grammar in Gmail without clicking.
Add Caret to Chrome, free

Good to know

Caret fixes the email body. It leaves your signature, the To field and email addresses alone.
It keeps your wording and tone. It fixes mistakes; it doesn't rewrite your email into formal English.
It works the same in Gmail's pop-out and full-screen compose windows.

Questions

Does Gmail have automatic grammar correction?

Gmail suggests spelling and grammar corrections as underlines that you click to accept. It doesn't apply them on its own. A Chrome extension like Caret applies the fixes automatically after you pause typing.

Will Caret change the meaning of my email?

Caret only fixes grammar, spelling and punctuation. If a correction would change too many words, it leaves your text alone.

Does it work in the Gmail mobile app?

No. Caret is a Chrome extension, so it works in Gmail in a desktop browser: Chrome, Edge or Brave.

Also see: a Grammarly alternative that fixes automatically, fix grammar in WhatsApp Web, fix grammar on LinkedIn.