FullRip.net is a free app that strips the audio from video files on YouTube and allows you to save them as MP3 files.
Functions:
Instantly convert the audio on video content files to MP3, download videos in 3GP, MP4, FLV and resolutions up to 1080p. Includes an advanced ID3 editor.
Activities:
Multiple dedicated servers to ensure reliability.
Recommendations:
For people who want a fast, reliable and unlimited conversion service for video files into MP3.