- Convert Online
- Audio Converters
- AMR to M4R
Convert AMR to M4R
Convert AMR to M4R in your browser. Your audio files are processed on your device and are not uploaded.
128kSets the output bitrate for the ringtone. 128 kbps is a good balance between quality and size for mobile playback.
Sets the output bitrate for the ringtone. 128 kbps is a good balance between quality and size for mobile playback.
1AMR files are usually mono. M4R supports stereo, but keeping mono may preserve compatibility and reduce file size.
AMR files are usually mono. M4R supports stereo, but keeping mono may preserve compatibility and reduce file size.
44100iPhones expect M4R files to use 44100 Hz sample rate for best compatibility. AMR files usually use 8000 Hz.
iPhones expect M4R files to use 44100 Hz sample rate for best compatibility. AMR files usually use 8000 Hz.
30
seconds
M4R ringtone files must be 40 seconds or shorter to be accepted by iPhones. This trims the audio to the given duration (default: 30 seconds).
M4R ringtone files must be 40 seconds or shorter to be accepted by iPhones. This trims the audio to the given duration (default: 30 seconds).
4. Download converted files
Private browser conversion: Your files stay on your device. Large files may take longer, and some formats depend on browser codec support.
How to use this AMR to M4R Converter?
- Choose one or more files or drop them into the input area.
- Adjust the available settings, then click Convert. Processing stays in this browser; nothing is uploaded.
- Download each result or download a ZIP for multiple files. Results disappear when you leave this page.
{
"convert": "amr-m4r",
"multiple": true,
"from": "amr",
"to": "m4r",
"note": "This conversion transforms AMR files (used in voice recordings and phone systems) into M4R format, which is used for iPhone ringtones. iPhones typically expect M4R files to be under 40 seconds in length and in AAC format.",
"controls": [
{
"type": "dropdown",
"name": "bitrate",
"label": "Audio Bitrate",
"options": [
{
"label": "64 kbps",
"value": "64k"
},
{
"label": "96 kbps",
"value": "96k"
},
{
"label": "128 kbps (Recommended)",
"value": "128k"
}
],
"defaultValue": "128k",
"desc": "Sets the output bitrate for the ringtone. 128 kbps is a good balance between quality and size for mobile playback."
},
{
"type": "dropdown",
"name": "channels",
"label": "Audio Channels",
"options": [
{
"label": "Mono (1 channel)",
"value": 1
},
{
"label": "Stereo (2 channels)",
"value": 2
}
],
"defaultValue": 1,
"desc": "AMR files are usually mono. M4R supports stereo, but keeping mono may preserve compatibility and reduce file size."
},
{
"type": "dropdown",
"name": "sample_rate",
"label": "Sample Rate (Hz)",
"options": [
{
"label": "8000 Hz (AMR Native)",
"value": 8000
},
{
"label": "22050 Hz",
"value": 22050
},
{
"label": "44100 Hz (iPhone Compatible)",
"value": 44100
}
],
"defaultValue": 44100,
"desc": "iPhones expect M4R files to use 44100 Hz sample rate for best compatibility. AMR files usually use 8000 Hz."
},
{
"type": "number",
"name": "duration_limit",
"label": "Trim to Max Duration",
"unit": "seconds",
"range": {
"min": 1,
"max": 40
},
"defaultValue": 30,
"desc": "M4R ringtone files must be 40 seconds or shorter to be accepted by iPhones. This trims the audio to the given duration (default: 30 seconds)."
}
],
"type": "audio",
"operation": "convert"
}
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