How to use the M4R converter
- Choose a file. Drop an M4R file to convert it to something else, or any other audio file to convert it to M4R.
- Check "Convert to". The converter picks MP3 for M4R files and M4R for everything else; change it if you need something different.
- Adjust quality if you want a smaller or higher-quality file.
- Click Convert and download the result.
What is an M4R file?
M4R is the iPhone ringtone format. Inside it is an AAC audio file like M4A; the different extension tells iPhone it is a ringtone. iPhone ringtones can be up to 40 seconds long.
M4R is mainly used for custom iPhone ringtones and text tones. It plays on iPhone, iTunes and Finder on Mac; most other players play it if renamed to .m4a.
M4R at a glance
| Full name | iPhone Ringtone |
|---|---|
| Type | Audio |
| Created by | Apple, 2007 |
| Compression | Lossy |
| Codec | AAC |
| Can be created here | Yes |
Pros and cons of M4R
Good
- The only format iPhone accepts for custom ringtones
Not so good
- Limited to 40 seconds
Common M4R problems and fixes
A ringtone does not appear on iPhone
It is probably longer than 40 seconds. Use the Ringtone Maker to trim it.
Popular M4R conversions
Frequently asked questions
How do I open an M4R file?
M4R files play on iPhone, iTunes and Finder on Mac; most other players play it if renamed to .m4a. If yours will not open, convert it to MP3 on this page; that format plays on any device.
How do I convert a file to M4R?
Drop any audio file on this page. "Convert to" is set to M4R automatically for files that are not M4R already.
How much does the M4R converter cost?
Nothing. It is free with no registration, no watermark and no limit on how many files you convert.
Is my file uploaded to a server?
No. The converter runs inside your browser using WebAssembly, so your file is processed on your own device and never sent to us or anyone else.
Is M4R lossy?
Yes, M4R normally uses lossy compression, which removes detail you are unlikely to notice to keep files small.