Really handy http://YouTube-mp3.org
It is the easiest online service for converting videos to mp3. You do not need an account, the only thing needed is a YouTube URL.
Sometime you like a song on youtube and you would like to get only the audio part.
It’s easy now: just go to youtube, find the song, copy the url something like http://www.youtube.com/watch?v=tEox1524n9Q , go to http://YouTube-mp3.org, you will notice a form with single input and one button named “Convert Video”. Just paste the url to that form, like below; and submit the form.
http://www.youtube-mp3.org/
That’s all folks,
in few seconds you you get the audio part in mp3 format.
It always works, I do not know how they are doing but the ads are skip from the final mp3 file, just perfect to be used as ringtone :).