RingtoniusFree ringtone tools
Quick checks that run in your browser. No upload, no sign-up.
Most failed ringtones fail for one of three reasons: the file is longer than 30 seconds, it's in a format the iPhone won't use, or it's a copy-protected song. The ringtone checker looks at a file in your browser and tells you which, if any, applies, before you spend time in GarageBand or the share menu.