Office online is a free version of Office 365. It is linked to your Outlook/Microsoft account (if you don't have it, you can create it by going to Outlook). Because it's a web application that runs in your browser, Office Online will run on everything, from PCs and Chromebooks to iPads and Android tablets.

Microsoft 365 for the web makes it easier for you to work in the cloud because Word, Excel, PowerPoint, OneNote, and PDF documents open in your web browser. Sign in to your organization's Microsoft 365 site to get started. You can access your documents whenever you have an Internet connection, from almost any device.