Add file extension

File extension M4B

The most common cause of problems with opening the M4B file is simply the lack of appropriate applications installed on your computer. In this case, it is sufficient to find, download and install an application that supports the M4B file format - this type of programs are available below.

File type MPEG-4 Audio Layer Audio Book Format
Developer Apple



It should be noted that some coded data from files that your computer does not read can be sometimes previewed in a Notepad. This way, we will read passages of a text or numbers. It is worth checking if this method can also be applied to the M4B files.

What should be done when an application from the list has already been installed?

Often, an installed application should automatically link to a M4B file. If it did not happen, the M4B file can be linked with the newly installed application manually. Simply right-click on the M4B file, then from the available list select "Choose default program". Next, select "Browse" and find the application you selected. These changes have to be confirmed by pressing the "OK" button.

Programs that can open the M4B file

  • iTunesiTunes
  • Windows Media PlayerWindows Media Player
  • WinampWinamp
  • VLC media playerVLC media player
  • ZuneZune
  • Helium Music ManagerHelium Music Manager
  • AVS Audio ConverterAVS Audio Converter
  • Aimersoft DRM Media ConverterAimersoft DRM Media Converter
Mac OS
  • iTunesiTunes
  • VLC media playerVLC media player
  • TuneClone Audio ConverterTuneClone Audio Converter
  • VLC media playerVLC media player
  • VLC media player for AndroidVLC media player for Android

Why can’t I open the M4B file?

However, problems with the M4B files can also have a different background. Sometimes even the software, installed on your computer, that supports the M4B files does not solve the problem. The reason for the fact that the M4B file can’t be opened and used can also be:

- an incorrect link to the M4B file in the registry entries
- corruption of a M4B file, that you want to open
- infection of a M4B file (viruses)
- insufficient computer hardware resources
- drivers out of date
- accidental deletion of the M4B file from the Windows registry
- incomplete installation of the program that supports a M4B file?

Solving these problems should allow the free opening and working with the M4B files. If the computer still has problems with the files, use the services of an expert who will diagnose a specific cause.

My computer does not show file extensions, what should I do?

In the standard Windows settings, a computer user cannot see the M4B file extension. However, you can successfully change this in the settings. Just go to "Control Panel" and select "Appearance and Personalization". Then, go to the "Folder Options" and open the "View" tab. On the "View" tab, you will find "Hide extensions for known file types" – you should mark this option and confirm by pressing "OK". At this point, the extension of all files, including the M4B files should be displayed after the file name.