This article explains what an ATOMSVC file is, how to open it in Excel, and how to save it in a different text format for easier reading.

A file with the ATOMSVC file extension is an Atom Service Document. It is sometimes called a Data Service Document or Data Feed ATOM file.

This XML-formatted text file defines how a document should reach a data source. This means that there is no real data in the file, only text addresses or pointers to the real sources.

You can open ATOMSVC files with Power Pivot for Excel, but you can't simply double-click the file and expect it to open like most files.