Convert M4B to AAC
Convert M4B files to AAC format online for free. No upload required, 100% private.
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M4BAACRe-encoding
Converting between two lossy formats (M4B → AAC) involves re-encoding, which may cause additional quality loss. For best results, convert from the original source file when possible.
About M4B
M4B
MPEG-4 Audiobook
M4B is an audiobook format based on MPEG-4. It supports chapters, bookmarks, and is the standard format for iTunes and Audible audiobooks.
Extension
.m4b
Developed By
Apple Inc.
Released
2001
Compression
LossyTypical Use Cases
AudiobooksPodcasts with chaptersLong-form audio content
Pros
- • Chapter support
- • Bookmark support
- • Good compression
Cons
- • Limited to Apple ecosystem
- • Not universal
- • Requires specific players
About AAC
AAC
Advanced Audio Coding
AAC is a lossy audio codec designed as the successor to MP3. It provides better sound quality at similar bitrates and is widely used in streaming services.
Extension
.aac
Developed By
ISO/IEC
Released
1997
Compression
LossyTypical Use Cases
YouTubeStreaming servicesDigital broadcastingMobile devices
Pros
- • Better quality than MP3
- • Efficient compression
- • Wide platform support
Cons
- • Patent encumbered
- • Less universal than MP3
- • Variable encoder quality