Common reasons to extract audio
Save a podcast interview from its video upload as a separate MP3, capture narration from a screen recording for a transcript, pull voiceover from a tutorial to remix into a new edit, or grab background music from a clip you legally own to sync against new footage. The workflow is the same: decode the video, discard the picture, encode only the audio.
MP3 vs AAC
MP3 is the safest default. It plays everywhere — even on a 20-year-old MP3 player — and the 192 kbps default quality is transparent for most source material. AAC produces smaller files at the same quality and is the modern standard for podcasts and streaming. Either is fine; pick MP3 unless you have a specific reason to prefer AAC.
What this tool is not
This is not a YouTube or streaming downloader. The tool only works on video files you already have — screen recordings, phone clips, podcast exports, interview footage. To download from a streaming site, use that platform's official download feature or a desktop app.