Convert OPUS to M4R
Fast, free OPUS to M4R conversion — works in any browser
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opus
Opus — Open Audio Codec for Voice and Music
| File extension | .opus |
|---|---|
| File category | audio |
| Programs | VLC media player foobar2000 MPV Audacity Firefox |
| Tech description | https://en.wikipedia.org/wiki/Opus_(audio_format) |
| MIME type | audio/ogg; codecs=opus audio/opus |
| Developer | Xiph.Org, IETF |
Opus is a free, open-source audio codec developed by Xiph.Org and the IETF, standardized in 2012 (RFC 6716). It supports bitrates from 6 kbps to 510 kbps, covering both low-bitrate voice calls and high-quality music streaming with a single codec. Opus consistently outperforms MP3, AAC, and Vorbis at equivalent bitrates in independent listening tests. It is used by YouTube, Spotify, Discord, WhatsApp, Zoom, and WebRTC applications. Opus is natively supported in Firefox, Chrome, Edge, and most modern media players including VLC, MPV, and foobar2000, across Windows, macOS, Linux, Android, and iOS.
m4r
M4R: the ringtone file used in Apple iOS
| File extension | .m4r |
|---|---|
| File category | audio |
| Programs | Apple iTunes GarageBand Audacity |
| Tech description | https://en.wikipedia.org/wiki/M4A |
| MIME type | audio/x-m4r |
| Developer | Apple Inc. |
The M4R format is used on Apple's mobile devices, mostly for storing ringtones. You can create an M4R file by converting other formats or downloading it from the iTunes Store. M4R is based on the standardized MPEG-4 format and is commonly encoded with AAC audio. One of its strengths is good sound quality at a small file size.
FAQ
How to convert M4R to OPUS?
Upload your M4R file, select OPUS as the output format, and click Convert. The converted file will be ready to download in seconds — no account or installation required.
How long does it take to convert M4R to OPUS?
Most M4R files convert in seconds. Larger files may take up to a few minutes depending on size and internet speed. You can track the progress bar in real time during conversion.
Is it safe to convert M4R files online?
Yes. All uploaded M4R files and converted OPUS results are automatically deleted from our servers within 1 hour after conversion. We do not store, share, or access your files.
Can I convert M4R on iPhone or Android?
Yes, our converter works on all devices and operating systems — iPhone, iPad, Android, Windows, and macOS. Open the site in your mobile browser, upload the M4R file and convert to OPUS without installing any app.
