MP4 to M4R Converter
As a professional conversion tool designed for iphone users, MP4 to M4R Converter provides an easy-to-use and fast way to convert mp4 and more popular video and audio formats to iphone ringtone format. After mp4 to m4r conversion, the software can also upload converted files to your iphone directly without iTunes. Besides, you can trim any clips you like from the video or audio file with this MP4 to M4R iphone ringtone maker.
This smart mp4 to m4r converter software can help you create custom ringtone for the iPhone. It can convert almost all mainstream video/audio formats including AVI, MPEG, WMV, DivX, H.264/AVC, AVCHD, MKV, RM, MOV, XviD, 3GP, WMA, WAV, RA, M4A, MP3, iTunes MP4 to M4R iPhone ringtone, and transfer the converted ringtone to iPhone directly without iTunes after conversion if you want.
This version is for PC. If you are using Apple Mac OS X, please click here.
Converting m4a to m4r with M4A to M4R Converter
Press" Browse" button to import mp4 files that you want to convert to m4r.
Click "Play" button to listen the music to find the segment that you want to use it as ringtone. Then drag and click the start & end slider to set your wanted segment, or type the start & end time in the corresponding text box directly to get the exact segment. Click "Pre-listen"button to pre-listen the converted audio before generate.
Click "Browse" button on the right side of "Local Output Folder" to choose the output destination.(Tips: Check "Export to iPhone" option, the converted ringtone will be load to your iPhone directly.)
After all the settings are finished, click 
to begin making your own iPhone ringtone.
Done.
You can edit iphone ringtone with mp4 to m4r converter, like: Delete the one you do not want to keep on iPhone. Transfer favorite ringtone to iPhone without iTunes. Clip climax of your music to iPhone ringtone, etc.