OPUS to M4R
Convert OPUS files to M4R in seconds, for free. Nothing to install.
Files are deleted from the server automatically after 1 h.
Why convert OPUS to M4R?
- Make any song an iPhone ringtone: M4R is the iOS ringtone format (the first 40 seconds are kept).
- Convert in a few seconds right in your browser, without installing software.
You don't need to install any software to convert OPUS to M4R. Upload your file, choose M4R and download the result a few seconds later. The conversion runs on our servers and your file is deleted automatically after 1 h.
OPUS vs M4R: comparison
| Feature | OPUSOpus Audio | M4RiPhone Ringtone (AAC) |
|---|---|---|
| Developer | Xiph.Org / IETF | Apple |
| Released | 2012 | 2007 |
| Type | audio | audio |
| Compression | lossy | lossy |
| Opens with | VLC, Chrome, Firefox, Telegram, WhatsApp | iPhone (Settings → Sounds), Finder / iTunes, VLC |
Tip: choose the bitrate. 128 kbps is enough for speech; 320 kbps is the best quality for music.
How it works
- Choose or drop your OPUS file.
- Pick M4R as the output format.
- Click “Convert” and download your file.
OPUS to M4R: questions and answers
Will quality be lost when converting OPUS to M4R?
M4R uses compression, but at the default settings the difference is hard to hear or see. You can choose a higher bitrate in Options.
How long does OPUS to M4R conversion take?
It depends on the length: a short file takes a few seconds, a long video can take a few minutes. Progress is shown as a percentage.
What is the maximum OPUS file size?
Up to 200 MB per file and up to 20 files at once — for free.
Can I convert OPUS to M4R on my phone?
Yes. TezConvert works in any browser on Android and iPhone — no app needed.
How do I open a M4R file?
M4R files open in: iPhone (Settings → Sounds), Finder / iTunes, VLC.
Are my files safe?
Files are used only for the conversion, never shown to anyone, and deleted automatically after 1 h. The original is deleted right after conversion.