The M4R format is used in Apples mobile devices, mostly for storing ringtones. You can create an M4R file by converting other formats or downloading it from the official iTunes store. The sound conversion employs a special type of compression, which significantly reduces the file size. The advantages of this format make it ideal for iPhone owners. M4R is one of the constituents of the standardized MPEG-4 format. One of its strong points is that the high sound quality is fully preserved after compression.

Convert from M4R
1	M4R To AAC
2	M4R To AC3
3	M4R To AIFF
4	M4R To AMR
5	M4R To AU
6	M4R To CAF
7	M4R To CDDA
8	M4R To DSS
9	M4R To DTS
10	M4R To FLAC
11	M4R To GSM
12	M4R To M4A
13	M4R To MP2
14	M4R To MP3
15	M4R To MP4
16	M4R To OGA
17	M4R To OGG
18	M4R To OPUS
19	M4R To SPX
20	M4R To SLN
21	M4R To TTA
22	M4R To VOC
23	M4R To W64
24	M4R To WAV
25	M4R To WMA
26	M4R To WV
27	M4R To AVI
28	M4R To MPEG
29	M4R To MOV
30	M4R To FLV

Convert to M4R
1	AAC To M4R
2	AC3 To M4R
3	AIFF To M4R
4	AMR To M4R
5	AU To M4R
6	CAF To M4R
7	CDDA To M4R
8	DSS To M4R
9	DTS To M4R
10	FLAC To M4R
11	GSM To M4R
12	M4A To M4R
13	MP2 To M4R
14	MP3 To M4R
15	MP4 To M4R
16	OGA To M4R
17	OGG To M4R
18	OPUS To M4R
19	SPX To M4R
20	SLN To M4R
21	TTA To M4R
22	VOC To M4R
23	W64 To M4R
24	WAV To M4R
25	WMA To M4R
26	WV To M4R
27	AVI To M4R
28	MPEG To M4R
29	MOV To M4R
30	FLV To M4R