Then click the desired service on the top right corner of the menu bar. To use Office Online, login to your Office365 account. If your device doesn't have the Office applications installed, you can still create and edit files using the online applications only. From within the online app, you can quickly change to the full version with just one click. Some functionality is only available using the full application suite. From any device, you can create word, excel, and powerpoint files within the browser itself. Office Online provides browser based, online versions of the Office applications.