Mp3tag is a metadata tag editor that supports many popular audio file formats. It is freeware for Microsoft Windows, while it is a paid application for Apple macOS in the Mac App Store.

Mp3tag has the following features:

It includes support for the following audio formats:

The following is an example of an M3U playlist file for "Jar of Flies" album by "Alice in Chains" that was created by Mp3tag with the following custom option settings: