Check grammar and spelling with the Microsoft Editor browser extension:

The Editor browser extension checks for grammar and spelling mistakes, and it makes suggestions for refining your writing, like addressing passive voice or wordiness.

Editor flags misspellings with red underlines, grammar mistakes with blue double-underlines, and style issues with purple dashes. Click an underlined word to see a list of suggested revisions.


Sign in to Editor

When you install the extension, a dimmed Editor icon is added to your browser’s toolbar. Click the icon and sign in with the account you use for Office, or sign in with your Microsoft account.


Refinements and advanced grammar checking are available only when you sign in to Editor with your Office 365 or Microsoft 365 subscription account. When you sign in with a free Microsoft account, Editor will still help you with basic spelling and grammar issues.


Editor’s settings let you choose what Editor checks for, and you can switch Editor off for websites where you don’t want the service.


Note: The browser extension works on most sites, but not all. Specifically, Google Docs is not yet supported. If you’re working in a web app that includes Editor, like Word or Outlook for the web, Editor’s suggestions come from Editor in the app, not from the browser extension.

Write in a different language

The default proofing language is the same as your browser language. If you write in a different language, choose a different proofing language in Editor settings. This setting applies to your writing across all websites, regardless of the website’s language.

Editor checks for grammar and refinements in more than 20 languages (and checks spelling in 89). For information about the issues that Editor checks in various languages, see Editor’s spelling, grammar, and refinement availability by language.

Turn off other grammar-checking extensions

If you have another writing assistant extension installed, we recommend turning it off for Editor to work best. Go to your browser’s extension settings and switch off other browser extensions that check your spelling and grammar.

  • In Edge, go to the three-dot Settings and more menu, and then Extensions.
  • In Chrome, go to the three-dot Customize and control Google Chrome menu, and then Settings > Extensions.

Get Editor

Editor runs as an extension on Edge or Chrome. Get it from your browser’s app store: