Convert OPUS to M4R in your browser. Your audio files are processed on your device and are not uploaded.
1. Add your files
or drop your OPUS files here
Up to 20 MB per file. You can select multiple files.
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128k
Sets the audio bitrate for the M4R ringtone. Higher values increase audio quality but also file size. 128 kbps is standard for good quality ringtones.
Sets the audio bitrate for the M4R ringtone. Higher values increase audio quality but also file size. 128 kbps is standard for good quality ringtones.
2
Select mono for smaller file size or stereo for richer sound. Most ringtones are mono but stereo is also supported.
Select mono for smaller file size or stereo for richer sound. Most ringtones are mono but stereo is also supported.
44100
Specifies how many audio samples per second are used. 44100 Hz is standard and ensures compatibility with most devices.
Specifies how many audio samples per second are used. 44100 Hz is standard and ensures compatibility with most devices.
30
Optional. If set, the audio will be trimmed to this maximum duration. Apple recommends ringtones be under 40 seconds.
Optional. If set, the audio will be trimmed to this maximum duration. Apple recommends ringtones be under 40 seconds.
Ready to convert
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 OPUS 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": "opus-m4r",
"multiple": true,
"from": "opus",
"to": "m4r",
"note": "The M4R format is used for iPhone ringtones and is based on AAC audio inside an MPEG-4 container. To be compatible with iPhones, the audio should ideally be under 40 seconds and encoded using AAC. This conversion uses FFmpeg to wrap AAC audio into an M4R container.",
"controls": [
{
"type": "dropdown",
"name": "bitrate",
"label": "Audio Bitrate",
"options": [
{
"label": "64 kbps",
"value": "64k"
},
{
"label": "96 kbps",
"value": "96k"
},
{
"label": "128 kbps (Standard)",
"value": "128k"
},
{
"label": "192 kbps",
"value": "192k"
}
],
"defaultValue": "128k",
"desc": "Sets the audio bitrate for the M4R ringtone. Higher values increase audio quality but also file size. 128 kbps is standard for good quality ringtones."
},
{
"type": "dropdown",
"name": "channels",
"label": "Audio Channels",
"options": [
{
"label": "Mono (1 channel)",
"value": 1
},
{
"label": "Stereo (2 channels)",
"value": 2
}
],
"defaultValue": 2,
"desc": "Select mono for smaller file size or stereo for richer sound. Most ringtones are mono but stereo is also supported."
},
{
"type": "dropdown",
"name": "sample_rate",
"label": "Sample Rate (Hz)",
"options": [
{
"label": "22050 Hz",
"value": 22050
},
{
"label": "44100 Hz (Standard)",
"value": 44100
},
{
"label": "48000 Hz",
"value": 48000
}
],
"defaultValue": 44100,
"desc": "Specifies how many audio samples per second are used. 44100 Hz is standard and ensures compatibility with most devices."
},
{
"type": "number",
"name": "duration_limit",
"label": "Trim to Max Duration (seconds)",
"optional": true,
"range": {
"min": 1,
"max": 40
},
"defaultValue": 30,
"desc": "Optional. If set, the audio will be trimmed to this maximum duration. Apple recommends ringtones be under 40 seconds."
}
],
"type": "audio",
"operation": "convert"
}
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