Easiest way to convert MP3 into iPhone ringtones
MP3をiPhone着メロに変換する最簡単な方法

Convert MP3 to iPhone Ringtone process

Download and install MP3 to M4R Converter, double click to launch it.
Step 1: Input file- Click "Browse" button to add target MP3 file that you want to convert to M4R format.

Step 2: Settings - you can set your desired part of the file by adjusting start time and end time while you listen to the music.You can click "Pre-listen" button to pre-listen the converted audio before generate

Tips
1. You can edit the added iPhone ringtone by click "Edit Ringtone". It's easy to rename the ringtone or remove it from your iPhone directly

2. If you have connected iPhone with PC, check the "Export to iPhone", WAV to M4R Converter can load converted M4R ringtone to iPhone directly.

Step 3: Output Settings- Click "Browse" on the right side of "Local Output Folder" to choose the output destination.
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Step 4: Click to begin converting MP3 music to M4R at once.

Hint: There are limitations for free trail that only 10 seconds ringtone can be converted while clip funchtion is restricted, so you need register it if you want to enjoy full functions.