Convert M4R to OPUS in your browser. Your audio files are processed on your device and are not uploaded.
1. Add your files
or drop your M4R files here
Up to 20 MB per file. You can select multiple files.
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64k
Specifies the target bitrate for Opus encoding. Lower values reduce file size and are suitable for voice, while higher values provide better fidelity for music.
Specifies the target bitrate for Opus encoding. Lower values reduce file size and are suitable for voice, while higher values provide better fidelity for music.
1
Sets the number of audio channels. Mono is ideal for ringtones and voice clarity, while stereo adds spatial depth for music.
Sets the number of audio channels. Mono is ideal for ringtones and voice clarity, while stereo adds spatial depth for music.
48000
Opus operates best at 48000 Hz. Lower sample rates reduce size but may affect fidelity.
Opus operates best at 48000 Hz. Lower sample rates reduce size but may affect fidelity.
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 M4R to OPUS 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": "m4r-opus",
"multiple": true,
"from": "m4r",
"to": "opus",
"note": "Opus is a modern audio codec optimized for voice and streaming. Converting from M4R (AAC-based ringtone) to Opus may reduce file size while preserving quality.",
"controls": [
{
"type": "dropdown",
"name": "bitrate",
"label": "Audio Bitrate",
"options": [
{
"label": "32 kbps (Voice-Only)",
"value": "32k"
},
{
"label": "64 kbps",
"value": "64k"
},
{
"label": "96 kbps",
"value": "96k"
},
{
"label": "128 kbps",
"value": "128k"
},
{
"label": "160 kbps",
"value": "160k"
}
],
"defaultValue": "64k",
"desc": "Specifies the target bitrate for Opus encoding. Lower values reduce file size and are suitable for voice, while higher values provide better fidelity for music."
},
{
"type": "dropdown",
"name": "channels",
"label": "Audio Channels",
"options": [
{
"label": "Mono (1 channel)",
"value": 1
},
{
"label": "Stereo (2 channels)",
"value": 2
}
],
"defaultValue": 1,
"desc": "Sets the number of audio channels. Mono is ideal for ringtones and voice clarity, while stereo adds spatial depth for music."
},
{
"type": "dropdown",
"name": "sample_rate",
"label": "Sample Rate (Hz)",
"options": [
{
"label": "16000 Hz",
"value": 16000
},
{
"label": "24000 Hz",
"value": 24000
},
{
"label": "48000 Hz (Default)",
"value": 48000
}
],
"defaultValue": 48000,
"desc": "Opus operates best at 48000 Hz. Lower sample rates reduce size but may affect fidelity."
}
],
"type": "audio",
"operation": "convert"
}
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