Convert M4B to MKV Online — Free
Fast, free M4B to MKV converter. No registration required.
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How to Convert
Upload your .m4b file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .mkv file when it's ready.
What is M4B?
M4B is the MPEG-4 audiobook format used by Apple iTunes and many audiobook platforms. It supports chapter markers, bookmarking, and AAC compression for efficient audiobook delivery.
Format Details
- Full Name
- MPEG-4 Audiobook
- Extension
- .m4b
Key Features
- Chapter support
- Bookmark resume
- iTunes compatible
- AAC compression
What is MKV?
MKV is an open-source container format that can hold unlimited video, audio, picture, or subtitle tracks. Popular for high-definition video content and anime.
Format Details
- Full Name
- Matroska Video
- Extension
- .mkv
Key Features
- Multiple audio tracks
- Subtitle support
- Chapter markers
- High quality
M4B vs MKV
| Feature | M4B | MKV |
|---|---|---|
| Full Name | MPEG-4 Audiobook | Matroska Video |
| Extension | .m4b | .mkv |
| Best For | Chapter support | Multiple audio tracks |