WebToolsAAC
M4B to AAC
M4B to AAC
Convert one M4B audio file or a full batch into AAC. Files are processed on the server, and multiple outputs download as a ZIP.
Select your M4B audio files
Drag, drop, or browse. Bulk conversion runs on the server.
Upload Audio
Add one audio file or batch several matching M4B files.
Convert Server-Side
Bulk uploads are validated and converted away from the browser.
Download Output
Download a single AAC audio file or a ZIP for bulk conversions.
More Audio Tools
Browse related audio format converters.