On its own, Office for the Web only edits files kept in OneDrive or SharePoint. Through Files.com it edits Word, Excel, and PowerPoint files wherever Files.com can reach them. That means an S3 bucket, an Azure Blob container, an Azure Files share, your own server, anything you’ve connected. Files.com hands the file to Office for the Web for you, using the WOPI protocol Microsoft built for this. So the Office subscription you already pay for finally works on all your storage, not just two Microsoft clouds.

Open Word, Excel, and PowerPoint right from a Files.com folder or a share link. No downloading, no re-uploading, no mess of duplicate versions. Every view, edit, and save stays under Files.com’s permissions and logging, so the file you open is the file everyone else sees.

A site admin can let anyone who opens a share link edit the Office file right in the browser. That covers outside partners with no Files.com account, editing live, with changes saved straight back to the original file. Almost no one else lets outsiders co-edit through a public link, so you skip the back-and-forth of emailing versions around.

The built-in Files.com editor needs no Microsoft 365 license and runs entirely on Files.com’s own servers. It handles more file types and bigger files, so a teammate without a license can still edit. Office for the Web is for teams that specifically want the familiar Microsoft experience.

Several Files.com users can see who else is in the document and watch each other’s edits in real time, with a marker showing who’s on which page of a long file. Every change saves itself back to the file in Files.com.