You enter the URL of a YouTube video into the search field on the Dirpy(Opens in a new window) website and click the Dirpy button.
YouTube To MP3 (Opens in a new window) by Motionbox is a conversion website that allows you to convert YouTube videos into a variety of file formats.
AceThinker, a provider of various software utilities, also has a YouTube conversion site (Opens in a new window). Enter the YouTube URL and then click the Download button on the right.
4K YouTube to MP3(Opens in a new window) is a program that you can download and install on your Windows or Mac computer.
YouTube to MP3 Converter (Opens in a new window) is a free conversion program from MediaHuman that you can install on your computer.