M4B to MP3 converter
Convert audiobooks in M4B format to MP3 so they play in car stereos and players that ignore M4B.
M4B and MP3 at a glance
M4B
M4B is the audiobook version of M4A and can store chapters and remember the playback position. Apple Books uses it, while most other players and car stereos do not.
MP3
MP3 is the most compatible audio format and plays on practically every device. It keeps files small by removing sounds that are hard to hear.
Questions
About converting M4B to MP3.
What quality does the MP3 have?
By default the MP3 uses a variable bitrate at high quality, which averages around 190 kbit/s for music. You can also choose a fixed bitrate between 96 and 320 kbit/s.
Can I convert audiobooks bought on Apple Books or Audible?
No. Purchased audiobooks are usually copy protected, and protected files cannot be converted.
Will the MP3 file have a watermark?
No. Converted files never get a watermark, free conversions included.
Where are my files stored?
On servers in the EU, and only for 24 hours. After that they are deleted automatically.