Sometimes only the sound matters — a talk you recorded, a rehearsal, a podcast that was published as a video. This tool reads the audio track out of your video and writes it as a clean MP3, leaving the picture behind. The result is a file a fraction of the original size that plays on any phone, car stereo or podcast app.
Bring MP4, MOV, MKV, AVI, WebM, M4V, FLV, WMV or MPEG. Batch it: a folder of clips comes back as a folder of MP3s.
Extraction, not re-recording
The audio is read directly from the video container and re-encoded once as MP3. There's no screen recording, no playback through a virtual cable, and no generational loss beyond that single encode. Because the video track is discarded entirely, a 400 MB clip typically becomes a handful of megabytes.
Picking a bitrate for extracted audio
Video soundtracks are usually AAC at 128–192 kbps, so encoding the extract at 320 kbps mostly buys file size rather than quality. 192 kbps is a sensible match for music-bearing video; 96–128 kbps is plenty for talks, lectures and interviews. If you need the audio for editing rather than listening, take it to WAV instead.