M4R
iPhone ringtone
An M4R file is an M4A with a different extension, which is how an iPhone recognises it as a ringtone. Ringtones are limited to about 40 seconds.
Opens in iPhone (as a ringtone), iTunes, Apple Music, GarageBand
M4R converterM4R to OPUS converter, without the upload.
Turn M4R ringtones into OPUS. It is converted in your browser, so the file never leaves your device.
Drop M4R files here
or choose from your computer paste with Ctrl V
from Photos or Files
Ready · other file types work too0 bytes uploaded, ever
Convert to
- On your device · nothing is uploaded
- No account, no email
- Batch and ZIP download
- Free
How to convert M4R to OPUS
Add your M4R ringtones
Drop M4R files onto the box above, or click it to choose them. ToAny reads the file's contents to detect the type, so a wrong extension does not matter.
OPUS is already chosen
Press Convert. Open Options first if you want to change the defaults. The work happens in this tab.
Download
Save the OPUS, or download everything as one ZIP if you converted several files.
Why ToAny
Private by construction
The M4R to OPUS converter is part of this page and runs inside your browser. Your ringtones are never sent to ToAny or to anyone else.
No upload, no queue
Nothing has to travel to a server and back, so the conversion starts the moment you press Convert, even on a slow connection.
Free, without an account
No sign-up, no email address and no watermark. Add several files and download them together as a ZIP.
M4R to OPUS: what to expect
M4R is treated as a ringtone, so ordinary players may not list it as music. Opus sounds better than MP3 or AAC at low bitrates. M4R is at home in custom iPhone ringtones and alert tones; OPUS is the usual choice for voice and music at low bitrates. Both formats are lossy, so the content is compressed a second time; start from the best copy you have.
The defaults suit most files. Under Options you can choose the bitrate and trim the start and end.
The conversion uses your browser's own video and audio codecs (WebCodecs), with hardware acceleration where the device has it; the file is read from disk as it goes and can be up to 2 GB. Where the browser lacks a codec, the page falls back to the compatibility engine. OPUS is written at 128 kbps unless you choose another bitrate.
M4R vs OPUS
OPUS
Opus audio
Opus is a modern open codec that sounds good at very low bitrates. WhatsApp voice notes, Discord and video calls use it. Standalone .opus files are less widely supported than the codec itself.
Opens in Current browsers, Android, VLC; many music apps and hardware players do not
OPUS converter| M4RiPhone ringtone | OPUSOpus audio | |
|---|---|---|
| Stands for | iPhone ringtone | Opus |
| Type | Audio | Audio |
| Compression | Lossy (AAC) | Lossy |
| Introduced | 2007, by Apple | 2012, by the Internet Engineering Task Force (with Xiph.Org, Mozilla and Skype) |
| Opens in | iPhone (as a ringtone), iTunes, Apple Music, GarageBand | Current browsers, Android, VLC; many music apps and hardware players do not |
| Best for | Custom iPhone ringtones and alert tones | Voice and music at low bitrates |
| File extension | .m4r | .opus |
Questions
Are my ringtones uploaded anywhere?
No. The M4R to OPUS conversion runs inside your browser, on your own phone or computer. The file is not sent to ToAny or to anyone else.
Does converting M4R to OPUS reduce quality?
OPUS is a lossy format, so a small amount of detail is traded for a smaller file. At the default setting the difference is hard to notice. You can choose the bitrate under Options.
Can I convert several M4R files at once?
Yes. Add as many as you like, convert them together and download each result or all of them as one ZIP.
How do I convert M4R to OPUS on Windows, Mac, iPhone or Android?
The steps are the same everywhere because ToAny runs in the web browser: open this page in a current version of Chrome, Edge, Safari or Firefox, add the M4R file, press Convert and save the OPUS. There is nothing to install.
Is there a file size limit?
Yes. Files up to 2 GB are accepted. Beyond that the limit is your device's memory, since nothing is uploaded; a computer copes with large files better than a phone.