4Videosoft iPhone Ringtone Maker for Mac provides the easiest way to convert AVI, MPEG, WMV, FLV, MKV, H.264/MPEG-4, DivX, XviD, MOV, RM, RMVB, MP4 to M4R iPhone Ringtone, and convert WAV, WMA, RA, M4A, AC3 and MP3 to M4R iPhone Ringtone.