M4B Converter

Convert MPEG-4 Audiobook files to 18 formats — free, fast, and private.

M4B · MPEG-4 Audiobook

M4B is an MP4 audio file flagged as an audiobook, supporting chapters and resume position.

Type
Audio
Extension
.m4b
MIME
audio/mp4
Best for
audiobooks on Apple Books and other players
Lossy compression
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About the M4B format

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Your M4B files, in any format.

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