Wrapping a raw AAC stream into an M4A file adds the MP4 container that iTunes, iPhones, and most tag editors actually require. The audio itself is normally untouched — only the packaging around it changes.
Convert AAC to M4A – Free Online AAC to M4A Converter
Why convert AAC to M4A?
- Make bare .aac files (ADTS streams) importable into Apple Music, iTunes, and iOS, which insist on a proper MP4 container.
- Gain accurate seeking and duration display — raw AAC streams often misreport their length in players.
- Add metadata, album art, and chapter support that a containerless .aac file cannot carry.
Tip: This is a remux, not a re-encode: the AAC data is copied into the M4A container unchanged, so there is no quality cost whatsoever.
How to convert AAC to M4A
- Upload your AAC file using the area above.
- M4A is preselected as the target format.
- Click Start and wait for the conversion to finish.
- Download your converted M4A file.