Online M4B Converter

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Information about M4B file format

Name M4B
Full name MPEG-4 Audio Layer Bookmarkable File
File extension .m4b
MIME type audio/m4b
Developed by Apple
Type of format Music File
Description Audiobook and podcast files which also contain metadata including chapter markers, images, and hyperlinks can use the extension .m4a but more commonly use the .m4b extension. M4b files support metadata for chapters and bookmarking on supporting players and most commonly uses AAC (Advanced Audio Codec).
Technical details The audio in a M4b file is encoded with the AAC compression format and can therefore be protected with Apple's FairPlay DRM copy protection system. M4b files can contain metadata as defined by the format standard and in addition can contain Extensible Metadata Platform (XMP) metadata.
Associated programs Apple QuickTime Player, Apple iTunes
Wiki https://en.wikipedia.org/wiki/MPEG-4_Part_14