Yes! You can use Grammarly in Microsoft Word Online by installing Grammarly for Windows or Grammarly for Mac on your computer if you have Windows 10 or newer or macOS 11 or newer. To learn more about Grammarly for Windows and Mac, check out this article: Grammarly for Windows and Grammarly for Mac user guide
If you use an older version of Windows or macOS, you can also upload your documents to the Grammarly Editor.
Using the Free plan? Upgrade to Pro to take advantage of advanced writing suggestions and more. Go to www.grammarly.com/plans to compare what Pro has to offer and choose the plan that works best for you.
If you see a warning that Grammarly cannot be used in Microsoft Word Online, it means that you’re currently using the Grammarly browser extension. In this case, to switch to Grammarly for Windows or Grammarly for Mac, open a new browser tab, click the Grammarly icon in your browser’s toolbar, and switch off Check text with browser extension: