M4B to M4A Converter

Batch convert m4b files to m4a online. Change m4b to m4a on Windows, Mac, iPhone and Android in 2 clicks.

Select files for conversion or drag and drop them to the upload area.
Your files are securely protected and available only to you.
All files are automatically deleted from our servers after 1 hour.

How to convert M4B files to M4A online?

Step-by-step instructions for converting m4b files to m4a

Upload M4B-file

Click "Choose File" button to select a m4b file on your computer. M4B file size can be up to 100 Mb.

Convert M4B to M4A

Click "Convert" button to start conversion.

Download your M4A

When the conversion process is complete, you can download the M4A file.


  • ❓ How can I convert M4B to M4A?
    First you need to add file for conversion: drag and drop your M4B file or click the "Choose File" button. Then click the "Convert" button. When M4B to M4A conversion is completed, you can download your M4A file.
  • ⏱️ How long does it take to convert M4B to M4A?
    Audio conversion is pretty fast. You can change M4B to M4A in a few seconds.
  • 🛡️ Is it safe to convert M4B to M4A on AnyConv?
    Of course! We delete uploaded files immediately, and converted ones after 1 hour. No one has access to your files. File conversion (including M4B to M4A) is absolutely safe.
  • 💻 Can I convert M4B to M4A on Mac OS or Linux?
    Yes, you can use AnyConv on any operating system that has a web browser. Our M4B to M4A converter works online and does not require software installation.

Information about M4B and M4A file formats

Name M4B M4A
Full name MPEG-4 Audio Layer Bookmarkable File M4A - Audio-only MPEG-4
File extension .m4b .m4a
MIME type audio/m4b video/mp4
Developed by Apple International Organization for Standardization
Type of format Music File Media container
Description Audiobook and podcast files containing metadata including chapter markers, images, and hyperlinks can use the extension .m4a but more commonly use the .m4b extension. M4b files support metadata for chapters and bookmarking on supporting players and most commonly uses AAC (Advanced Audio Codec). MPEG-4 Part 14 or MP4 is a digital multimedia container format most commonly used to store video and audio. However, it can also be used to store other data such as subtitles and still images. M4A stands for MPEG 4 Audio and is a filename extension used to represent audio files.
Technical details The audio in a .m4b file is encoded with the AAC compression format and can therefore be protected with Apple's FairPlay DRM copy protection system. In addition, M4b files can contain metadata as defined by the format standard and, in addition, can contain Extensible Metadata Platform (XMP) metadata. Audio-only MPEG-4 files generally have a .m4a extension. This is especially true of non-protected content. M4A is often compressed using AAC encoding (lossy) but can also be in Apple Lossless format.
File conversion M4B conversion M4A conversion
Associated programs Apple QuickTime Player, Apple iTunes Windows Media Player, RealPlayer, MPlayer, Media Player Classic, VLC Media Player, K-Multimedia Player
Wiki https://en.wikipedia.org/wiki/MPEG-4_Part_14 https://en.wikipedia.org/wiki/MPEG-4_Part_14