You have mp3 format of your favorite song, now you can upload the song on online ringtone maker and download ringtone for free. Mobile phones will support and run the ringtone created by you. Here is the how to create a ringtone by mp3 and other formats.
You can create your own Ringtone online for free on Makeownringtone.com by uploading your MP3 file and editing the according to your choice. it supports multiple format like MP3, AAC, OGG, MP4, MMF etc.
First of all you need to upload the audio file and then you can select the part of the file which you want to play as a Ringtone. There are lot many options provided there, for example Fade, No Silence, Bass, Treble, speed factor, pad, high pass, low pass etc.
I am sure that you are going to love this idea of creating or editing your own Ringtone.