M4B converter - online and free
Step 1 - Select a file(s) to convert
Drag & drop files
Max. file size 50MB (want more?)
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Step 2 - Convert your files to
Or choose a different format


Fast Downloads
Zamzar converts files in real-time, which means a file can now be converted more quickly than it takes for you to make a cup of coffee.

Secure
All of our hardware runs in world-class, highly secure data centres utilizing state-of-the-art electronic surveillance and multi-factor access control systems.

Ease of Use
You can convert a file for free in just a few clicks, without any need to register for an account.

Privacy
We recognise that you have entrusted Zamzar with your files and your personal information, and handling your data is a serious responsibility; we want you to know how we go about doing that. Our privacy policy can be read here.
You're in good company:
Zamzar has converted over 510 million files since 2006
Convert from M4B
Using Zamzar it is possible to convert from M4B to a variety of other formats
- m4b to aac (Advanced Audio Coding File)
- m4b to ac3 (AC3 Audio File)
- m4b to flac (Free Lossless Audio Codec)
- m4b to m4a (Compressed video file)
- m4b to m4r (iPhone Ringtone File)
- m4b to mp3 (Compressed audio file)
- m4b to mp4 (MPEG-4 Video File)
- m4b to ogg (Ogg Vorbis Compressed Audio File)
- m4b to wav (Windows audio file)
- m4b to wma (Windows Media Audio)