Step 1:
Go to http://www.phonezoo.com/home.do and sign up. This site is totally free. Be sure to leave the 3rd Party Offers box unchecked if you don’t want to get spammed.
Step 2:
On Phonezoo, go to Home > Create Ringtone. Browse to your audio file and upload it. If you didn’t get your music from a Creative Commons site or make it yourself, it’s probably copyrighted. Check the appropriate box.
Step 3:
Use the Phonezoo editor to choose which part of the audio file you want as your ringtone. Preview it by using the play button, and practice using fades!
Step 4:
When you’re finished editing, choose “Save and Send to Phone”.