What is M4R?
| Full name | iPhone Ringtone File |
| Format type | Audio |
| Developed by | Apple |
| Description | Apple created the M4R format to store iPhone ringtones created with Apple iTunes. You will most likely encounter this format if you transfer a ringtone from a computer to an iPhone. If you don’t know how to open and play M4Rs, check out the associated programs list. |
| File extension | .m4r |
| Technical details | The M4R file type is based on the widely supported MPEG-4 Part 14 specification. This audio format supports copyright protection. The playback of protected M4R files is not possible on any non-Apple device. However, if the M4R file isn’t copy-protected, you can open it with almost any player. |
| Associated programs | iTunes, QuickTime Player, Windows Media Player, and VLC |
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