A software application or online service that extracts the audio component from video files hosted on YouTube, converting it into the MPEG Audio Layer III (MP3) format. This process allows users to save the audio portion of a YouTube video as a standalone audio file, enabling offline listening on various devices.
The ability to isolate and save audio from online videos offers benefits such as access to content in environments without internet connectivity, the creation of custom audio playlists, and the preservation of audio content for future use. Historically, this functionality addressed the need for users to listen to lectures, music, or other audio-based content from YouTube without requiring continuous video streaming, thus conserving bandwidth and mobile data.