MP4 Tag Editor is a powerful and easy-to-use tool to edit metadata of MP4 Audio Codec files (.aac .mp4 .3g2 .m4a .m4r .m4b .m4p). It support fast edit title, album, artist, genre, year, track and comment of MP4. It also support change CoverArt Image. App does not add tags to files uploaded from folders different than Music Library.