File extension M4B (.M4B) information

Windows cannot open M4B files?

If Windows is unable to open file extension .M4B you may have registry related errors or may not have the appropriate program installed. We strongly recommend that you run a free registry scan.

Appropriate program:

The .M4B file extension identifies MPEG-4 Audio files. M4A files are used to store the audio content accompanying movies and are specialized for storing speech (as opposed to music). M4B files are essentially the same as .M4A files, and are designed to save audio books which can then be downloaded from the Internet and played back using the Microsoft Windows Media Player or Apple iTunes. The main difference between a .M4A file and a M4B file is that .M4B files can be bookmarked.. Incorrect associations are the cause of many file extension errors. Scan your system to prevent, identify and repair M4B file extension association errors.


  • Performance: To optimize memory and CPU usage for M4B files run a free performance scan.
  • Stability: Fix M4B errors to make your system and applications more stable.
  • Drivers: Scan your PC for the outdated drivers which lead to system errors and slowdowns.

You are currently viewing the detail page for ABF file extension. This page contains a detailed description of the ABF file type, software tools to help resolve file association errors in the Windows registry together with relevant system utility applications and other related information.