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.M4B File Extension

File TypeMPEG-4 Audio Book File

3.4 (28 Votes)
CategoryAudio Files

What is an M4B file?

Audiobook file based on the MPEG-4 container format; typically compressed with .AAC encoding; nearly identical to an .M4A file, but denoted as an audiobook and can be "bookmarked" by supporting audio players.

More Information

The M4B extension is used by audiobooks downloaded from the Apple iTunes store. These audiobooks may be copy-protected using Apple's FairPlay DRM, which means they can only be played on authorized computers or iPods.

Winamp can be used to play unprotected M4B files on Windows computers. However, the settings for the MPEG-4 plug-in may need to be modified to support files with an ".m4b" extension.

Open and view .M4B files with File Viewer Plus.
Programs that open M4B files
Updated 10/18/2016

About M4B Files

Our goal is to help you understand what a file with a *.m4b suffix is and how to open it.

The MPEG-4 Audio Book file type, file format description, and Mac, Windows, and Linux programs listed on this page have been individually researched and verified by the FileInfo team. We strive for 100% accuracy and only publish information about file formats that we have tested and validated.

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