M4B to AAC Converter

Batch convert m4b files to aac format online for free

Choose files or drag & drop them here.
Only you have access to your files.
All files will be deleted after one hour.

How to convert M4B files to AAC online?

Step-by-step guide to convert m4b to aac using AnyConv. It works on PC (Windows, Mac, Linux) and mobile devices (iPhone, Android).

Upload M4B-file

Drag and drop your M4B file into the upload area. The maximum file size is 100 MB.

M4B to AAC

Click "Convert" to change m4b to aac. The conversion usually takes a few seconds.

Download your AAC

Now you can download the AAC file. The download link only works on your device.


  • ❓ How can I convert files from M4B to AAC?
    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 AAC conversion is completed, you can download your AAC file.
  • ⏱️ How long does it take to convert M4B to AAC?
    Audio conversion is pretty fast. You can change M4B to AAC in a few seconds.
  • 🛡️ Is it safe to convert M4B to AAC 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 AAC) is absolutely safe.
  • 💻 Can I convert M4B to AAC on Mac OS or Linux?
    Yes, you can use AnyConv on any operating system that has a web browser. Our M4B to AAC converter works online and does not require software installation.

Information about M4B and AAC file formats

🔸 File format M4B AAC
🔸 Full name MPEG-4 Audio Layer Bookmarkable File AAC - Advanced Audio Coding
🔸 File extension .m4b .aac
🔸 MIME type audio/m4b audio/aac
🔸 Developed by Apple Bell Labs, Fraunhofer Institute etc.
🔸 Type of format Music File Audio compression format
🔸 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). Advanced Audio Coding (AAC) is an audio coding standard for lossy digital audio compression. Designed to be the successor of the MP3 format, AAC generally achieves better sound quality than MP3 at similar bit rates. ISO and IEC have standardized AAC as part of the MPEG-2 and MPEG-4 specifications.
🔸 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. AAC supports the inclusion of 48 full-bandwidth audio channels in one stream plus 16 low-frequency effects channels, up to 16 "coupling" or dialog channels, and up to 16 data streams. The quality for stereo is satisfactory to modest requirements at 96 kbit/s in joint stereo mode; however, hi-fi transparency demands data rates of at least 128 kbit/s.
🔸 File conversion M4B conversion AAC conversion
🔸 Associated programs Apple QuickTime Player, Apple iTunes foobar2000, AIMP, DirectShow, QuickTime, VLC media player.
🔸 Wiki https://en.wikipedia.org/wiki/MPEG-4_Part_14 https://en.wikipedia.org/wiki/Advanced_Audio_Coding