MP3-tag is powerful tags editor software for MP3 and other audio files. The program allows you to create play lists, rename files, organize folders, export data to different formats, and more. MP3-tag is a great solution to organize your audio collection easily. MP3-tag allows you to modify tags in all subfolders at once. When you open folders, you can see the total play time, the bit rate, and the size of all audio files there.