MP3 to M4R -- convert mp3 ringtones to m4r
How to change a mp3 file to a m4r file
MP3 to M4R Converter, a professional conversion software, is able to convert almost all mainstream video/audio formats including AVI, MPEG, WMV, DivX, MP4, H.264/AVC, AVCHD, MKV, RM, MOV, XviD, 3GP, WMA, WAV, RA, M4A, MP3 to M4R iPhone ringtone, and transfer the converted M4R ringtone to iPhone directly without iTunes after conversion if you want. If you just love a clip in a music file, this iPhone ringtone converter helps you set exact start time and end time of the segment you want and turn it into iPhone ringtone.
Guide: how to convert mp3 to m4r format
You can free download MP3 to M4R Converter and install it in your computer. After running the software, you shoulde need to click
button.
1. Click "Add File " button to add mp3 files you want to set as iphone ringtone. The added files will shown in the input file name tag.
You can drag the two sliders to reset the start time and end time or change the name to make it. Click Play button to pre-listen to the added music.

2. Change the Destination folder by clicking "Browse" button You can see it in Local Output File tag.
3. Now you can start converting mp3 to m4r by clicking "Import" button.

There is a progress bar which is to show you the conversion status. You just need to wait until it goes to the end. The conversion has been finished. Now set as iphone ringtone and enjoy it.