MusicRenamer Uses ID3 Tags to Rename Files has released MusicRenamer, a free utility that uses the ID3 tags in song files to automatically rename them. It follows the same naming convention for each song and supports the MP3, AAC, M4P, and M4A formats. The company noted that it is useful when file recovery software has retrieved music files but has given them cryptic names. Mac OS X v10.3 is required.