Ringtone maker — cut any song into a ringtone
Drop in a song, drag the two handles around the part you want, hear it, and download it as an MP3 or WAV. Cut in your browser — the song never leaves your device.
iPhone takes ringtones as .m4r: add the MP3 to GarageBand or iTunes and export it as a ringtone. Android and most others take the MP3 as it is.