MP4B

MPEG-4 Audio Layer bookmarkable data

File type: Audio and sound file

The mp4b file extension is related to the MPEG-4 Audio Layer bookmarkable file format used by Apple QuickTime.

What is mp4b file?

Date updated: November 24, 2016

The mp4b file format is similar to files using m4a.

The difference is however, that the mp4b files can be bookmarked and thus are mostly used for audio books, podcasts and any other audio work.

The default file extension for MPEG-4 Audio Layer bookmarkable file is m4b.

Use QuickTime to work with *.mp4b bookmarkable data.

Use compatible tools to export mp4b files to other formats.

Play

Apps designed for playing mp4b files:

Microsoft Windows

Apple QuickTime

Apple macOS / Mac OS X

Apple QuickTime for Mac