Convert M4R to AMR
Convert M4R files to AMR format online for free. No upload required, 100% private.
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M4RAMRRe-encoding
Converting between two lossy formats (M4R → AMR) 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 AMR
AMR
Adaptive Multi-Rate Audio Codec
AMR is a speech audio codec optimized for voice recording. It is commonly used in mobile phones for voice memos and MMS messages.
Extension
.amr
Developed By
ETSI
Released
1999
Compression
LossyTypical Use Cases
Voice recordingMobile phone audioMMS messagesVoIP
Pros
- • Very small file size
- • Optimized for speech
- • Mobile device support
Cons
- • Poor music quality
- • Speech only
- • Limited compatibility