youTube to MP3,4 converters are online tools that allow users to convert YouTube videos into MP3 or MP4 audio files. These converters are typically free to use and can be accessed from any web browser. To use a YouTube to MP3,4 converter, simply copy the URL of the YouTube video you want to convert and paste it into the converter's website. The converter will then convert the video into an MP3 or MP4 file, which can be downloaded and saved to a device for playback at any time.