File Extension Database

Open M4B File

A file with the M4B extension is an audio book file that conforms to the MPEG-4 standard.

M4B files are often used by iTunes to store audio books.

Some media players use the M4B format to store digital bookmarks along with the audio, allowing you to pause playback and then resume it later. This is one of the reasons why they are preferred over MP3s, which cannot save their place in the archive.

In Another way, the M4A audio format is basically identical to M4B, except those file types are used for music rather than audiobooks.

The iPhone, an Apple product, also uses the MPEG-4 audio-type format for ringtones, however those files are saved with the M4R extension.

Open an M4B file

There are various methodologies, depending on the device, for opening an M4B file.

For example on the iPhone, iTunes is used as the main program to play M4B files.

However, iTunes is also useful on a computer, to transfer audiobooks to an iPhone or other iOS device.

On the other hand, Windows Media Player works too, but the extension may not be associated with the software, therefore you may have to open Windows Media Player first and then open the M4B file manually from the main menu.

Software to open an M4B file

Typical M4B application file locations:

C:\Program Files (x86)\iTunes\iTunes.exe /open "%L"
"C:\Program Files (x86)\iTunes\iTunes.exe" /play "%L"
C:\Program Files (x86)\QuickTime\QuickTimePlayer.exe "%1"

Typical M4B mime types:

audio/m4b

Frequently used application names to open M4B files:

iTunes
QuickTime

Frequently associated Windows objects:

iTunes.m4b
Microsoft.Zune.2.M4B
QuickTime.m4b

How Can I Open M4B File on Windows

We researched and learned that the best way to open M4B file is to find a M4B file in question in Windows OS File Explorer and double click on it to launch the corresponding application.
If a M4B file is not opened in an application and you instead get a "Windows can't open a file" error message you should try looking for an application which can open the file in question.
If you know the application which can open M4B file then run it and see if there is a File->Open main menu option in the application.
If you don't know the application which function as M4B file opener then try to search online for "M4B viewer", "application to open M4B file" or "open M4B file" queries in the search engine you like.
Install the application you found and check if it can open M4B file

How Can I Open M4B File on Mac OS

We recommend to find a M4B file in question in Mac OS Finder and double click on it to launch the corresponding application.
If a M4B file is not opened in a Mac OS application and you instead get a "There is no application set to open the file" error message you can click on "Search App Store" in the error dialog and Mac OS will show you applications compatible with M4B file.
If you know the Mac OS application which can work as M4B file opener you can choose the "Choose Application..." option in the error box to associate the file extension and open M4B file in it.
If you don't know the application which can open M4B file then try to search for "M4B viewer", "application to open M4B file" or "read M4B file" queries in the online search engine you like.
Install the application you found and check if it can read M4B file

How Can I Open M4B File on Android

If you downloaded a M4B file on Android device you can open it by following steps below:

In the Android apps list on your Android device find "My Files" or "File manager" app and tap to start it.
Tap on "Downloads" folder inside the app.
You should see your downloaded M4B file in that folder.
Tap on the file. If Android device supports opening the file you downloaded it will open in the corresponding app.
If file does not open you can look for the corresponding app that can open the file by searching Android App Store for the "M4B".
If you cannot open the file with the apps from Android App Store it is possible that the file could only be opened on desktop platforms such as Windows or Mac OS. Try searching for "M4B viewer", "M4B file reader" online and see if any desktop applications can open it.
It is also possible that the file you downloaded is outdated and is no longer supported.

How to Open M4B File on iPhone or iPad

To open M4B File on iOS device follow steps below:

We advies to open Files app on your iPhone or iPad device. You can find it by swiping down on the home screen and typing "Files" in the search bar.
Tap on the Downloads folder on the Files app home screen.
You will see all files that you recently downloaded. Tap on the M4B file to view it.
If you have the right app that can open it it will automatically launch and open your file.
If you don't have the app which can open it you need to serch Apple app store for "M4B". This way you can find apps which can open M4B files.
If this doesn't help it is possible that your file could be opened only by the desktop application. To find an app which can open it on desktop look for "M4B viewer" or "M4B file" online in your favorite search engine.

Populating this website with information and maintaining it is an ongoing process. We always welcome feedback and questions that can be submitted by visiting Contact Us page. However since there are many users visiting this website and because our team is quite small we may not be able to follow up personally on every request. Thank you for your understanding.