What Is an M4B File and How to Open It on Different Platforms [MiniTool Wiki]

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What Is an M4B file?

What is an M4B file? M4B is an audiobook file based on the MPEG-4 container format. It is usually compressed with AAC encoding, which is almost the same as a .M4A file. But it is expressed as an audiobook and can be "bookmarked" by supporting an audio player.

Tip: If you want to learn about other audio file formats, you can go to the MiniTool official website.

If you download the audiobooks from the Apple iTunes store, the audiobooks use the M4B extension. And they can only be played on the authorized computers or iPods. Then, let’s see some M4B players on different platforms.

How to Open the M4B File?

Windows

If you use Windows, you can use Windows Media Player to open the M4B format. Since Windows may not recognize the M4B extension, you may need to open Windows Media Player first, and then manually open the M4B file from the WMP menu. You can also rename the extension from M4B to M4A because Windows does correctly associate M4A files with Windows Media Player.

Here is how to open the M4B file with Windows Media Player:

Step 1: Right-click the M4B file and select Open with. You’ll then get a list of available programs and you need to click Windows Media Player.

Step 2: You may get a message saying that the file extension might not be recognized. You just need to ignore this message and click Yes to play the content.

Step 3: Then, the M4B file should be played successfully.

Besides, you can also try the VLC media player to play the M4B file.

windows media player not working thumbnail
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iPhone/Mac

If you are an iPhone or Mac user, you can use iTunes to play the M4B file. iTunes is the main program used to play M4B files on your computer and transfer audiobooks to iPhone or other iOS devices. You can do this by adding audiobooks to iTunes and then syncing the device with iTunes. Here is how to do that:

Step 1: In Windows, you need to click the File menu to choose Add File to Library... or Add Folder to Library.... If you're on a Mac, you need to go to File and click Add to Library....

choose Add File to Library... or Add Folder to Library...

Step 2: After inserting the device, click the phone icon in iTunes to switch the window to the iOS device.

Step 3: Click the Audiobooks menu. Put a checkmark next to Sync Audiobooks, and then pick the audiobooks that you want to sync.

Step 4: Now you can sync your device with iTunes to send M4B files to iPhone, iPad, or iPod touch.

How to Convert the M4B file?

Since M4B files are usually audiobooks, the file sizes of them are usually very large. You had better use some online converts to convert M4B. M4B can be converted to MP3, WAV, WMA, M4R, FLAC, and other audio formats. Maybe you are interested in this post - Top 4 M4B to MP3 Converters - How to Convert M4B to MP3

You can use ZamZar to convert M4B to any file formats. It supports more than 1200 file formats and it can work with any operating system. Besides, you complete all your conversions in under 10 minutes. However, the uploaded file can not exceed 150 MB. If you'd like to convert larger video files, you need to try another converter.

Here is how to use Zamzar to convert M4B online.

Step 1: Go to Zamzar and choose Add File... to add the M4B file.

Step 2: Click Convert To to select the file format that you want to convert to and click the Convert Now option.

Step 3: Then, it will start the converting process. You just need to wait for it. After that, you can click the Download button to save the converted file on your device.

The End

To sum up, this post mainly introduces the definition, the opening ways, and the conversion of the M4B file. Besides, some free M4B file converters and online M4B file converters are also talked about. So, you can open your M4B files in different ways.

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