How to Convert AAC to M4B Online?


Add AAC file(s) that you want to convert.


Select M4B as the output format you want to convert AAC file(s) to.


Click CONVERT to convert your AAC file(s).


Click DOWNLOAD to save your converted M4B file(s).

Differences Between Our Online and Desktop Converters

online converter

Online Converter

  • Long-time wait
  • Up to 100MB file size
  • Popular formats supported
  • A muximum of 2 files in one conversion
  • Slow conversion speed
fast desktop converter

Faster Desktop Converter

  • 0 second wait
  • No size limits
  • 1000+ formats supported
  • Limitless batch conversion mode integrated
  • 30X faster than any converter

AAC to M4B

Using Online UniConverter (originally, it's easy to convert AAC files to a variety of other formats.

AAC 转 MP3 (MP3 Audio Format)

AAC 转 WAV (Waveform Audio File Format)

AAC 转 M4R (MPEG-4 Audio format for Ringtones)

AAC 转 M4A (Compressed Audio File)

AAC 转 AC3 (AC3 Audio File)

AAC 转 AIFF (Audio Interchange File Format)

AAC 转 M4B (MPEG-4 Audio Book File)

AAC 转 APE (Monkey's Audio)

AAC 转 AMR (Adaptive Multi Rate)