123 Convert YouTube to MP3 - Version 4.012 The 123 Convert YouTube to MP3 desktop software makes it very easy to convert all your favorite music videos from YouTube to MP3 or other audio formats. The videos will be downloaded fast and there is no quality loss at all. There are some great features included as well: Automatic filenaming and ID3 tagging, Choose between WMA, MP3 and M4A file conversion, Download multiple songs simultaneously and more!The program is designed to make it as easy as possible for you to download music.