Mp3tag is a powerful and yet easy-to-use tool to edit metadata of common audio formats. It allows for batch tag-editing of ID3v1, ID3v2.3, ID3v2.4, iTunes MP4, WMA, Vorbis Comments and APE Tags for multiple files at once.

Mp3tag supports online database lookups from, e.g., Amazon, discogs, MusicBrainz or freedb, allowing you to automatically gather proper tags and download cover art for your music library.

Mp3tag provides reusable actions where you can pick from a variety of pre-defined actions such as renaming files based on the tag information, creating playlists, replacing characters or words in tags and filenames (with support for regular expressions), or importing and exporting tag information and embedded album art from files. Those actions can be composed in to reusable groups so that repetitive tasks can be automated and can be applied to your files with a single mouse click.

Besides these main features, Mp3tag offers a variety of other functions and features ranging from generating nice reports and lists of your collection based on user-defined templates, over support for iTunes-specific tags like media type or TV Show settings, to a user-interface and tagging infrastructure that is fully Unicode compliant.