Convert WMA to M4B Online — Free
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Upload your .wma 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 .m4b file when it's ready.
What is WMA?
WMA is an audio format developed by Microsoft. It offers good compression and is commonly used in Windows environments.
Format Details
- Full Name
- Windows Media Audio
- Extension
- .wma
Key Features
- Windows native
- Good compression
- DRM support
- Streaming capable
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
WMA vs M4B
| Feature | WMA | M4B |
|---|---|---|
| Full Name | Windows Media Audio | MPEG-4 Audiobook |
| Extension | .wma | .m4b |
| Best For | Windows native | Chapter support |