M4B File Format
An M4A variant with chapter markers, designed for audiobooks.
M4B at a glance
| Full name | MPEG-4 Audiobook |
|---|---|
| MIME type | audio/mp4 |
| Category | Audio |
| Best for | audiobooks, spoken-word content |
| Compatibility | Supported by Apple Books, Audible-adjacent apps and most audiobook players. |
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Frequently asked questions
What is a M4B file?
M4B is an M4A variant with chapter markers, designed for audiobooks. Technically it is MPEG-4 Audiobook, with the MIME type audio/mp4.
What can I convert M4B to?
converthubor can turn M4B into 202 different formats, including 264, 265, 266, 302, 3G2, 3GP.
What can I convert M4B from?
You can create M4B files from formats such as MP4, MKV, AVI, MOV, WEBM, FLV.
Is converting M4B free?
Yes, every conversion on this site is free and does not require an account.