But there will never be too many to discover interesting and free web apps, one of Free Nuts’s readers has recommended another one — ConvertMeMp3, which is also available for you to download YouTube videos as MP3 files online for free:
On the ConvertMeMp3 website, you can enter the URL of the YouTube video you want to download, select the audio quality from Low, Medium and High, and click the "Create MP3 file" button, then the video will be converted to a MP3 file, which you can download when it is ready.
By the way, if you are using a proxy tool, there may be an error when clicking the “download mp3 file” link, since your mp3 download WON’T begin shortly, and you need to click the "[clicking here]" link to download, but there is no such an error when using a VPN service.
(Source)
