http://www.mp3tom4rconverter.com/

Have a iPhone and want to diversify your ringtone?If you are searching
for the mp3 to m4r iPhone Ringtone?this following converter-MP3 to M4R
Converter is the best what you are after.
It's no doubt that MP3 to M4R Converter is an amazing converter
designed for iPhone users which is not only convert MP3, WMA, AAC,
WAV, OGG, M4A, AC3 to M4R iPhone Ringtone, but convert any video
format to M4R such as AVI, MPEG, WMV, MP4, FLV, MKV, H.264/MPEG-4,
DivX, XviD, MOV, M4V, VOB, 3GP, H.264, etc. Apart from converting
function, MP3 to M4R can get the segment from your video and audio
sources exactly by setting the start and end time. Certainly, you can
pre-listen the clipped music.


Simple guide show how to convert mp3 to m4r on Mac

Choose an MP3 file to upload by selecting "Browse".

Edit the file by choosing your selection and desired length, you can
listen to the resource and clipped music.

Choose a folder to save the converted mp3 to m4r file on Mac. And if
you have connnect iPhone to PC, just check the "Export to iPhone", Mac
MP3 to M4R Converter can transfer M4R Ringtone to iPhone directly
without iTunes.

Click"Generate" to begin the mp3 to m4r conversion on Mac.


http://www.customiphoneringtone.com/
If you are a Mac user and want to custom your iPhone Ringtone, just
have a try this Mac iPhone Ringtone Custom, as the same easy to use.
And Like Custom iPhone Ringtone, it can convert popular video and
audio formats to iPhone Ringtone.


Tipard iPhone Ringtone Custom turns your dream of making your own
iPhone/iPhone 3G Ringtone with loved music into reality in the way of
converting almost all mainstream video/audio format to M4R iPhone
ringtone, such as avi, mpeg, mp4, mov, flv, mp3, aac, m4a, wma, etc.
to M4R iPhone Ringtone.
http://www.iphoneringtonecustom.com/