Convert M4R to M4B
Convert M4R files to M4B format online for free. No upload required, 100% private.
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M4RM4BRe-encoding
Converting between two lossy formats (M4R → M4B) involves re-encoding, which may cause additional quality loss. For best results, convert from the original source file when possible.
About M4R
M4R
iPhone Ringtone Format
M4R is the ringtone format used by Apple iPhones. It is essentially an M4A file with a different extension, limited to 40 seconds for ringtones.
Extension
.m4r
Developed By
Apple Inc.
Released
2007
Compression
LossyTypical Use Cases
iPhone ringtonesiOS alert tonesCustom notification sounds
Pros
- • Native iPhone support
- • Easy to create from M4A
- • Good audio quality
Cons
- • iPhone only
- • 40 second limit
- • Requires iTunes for transfer
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