Upload an MP4 file and strip the video track, keeping only the audio. The remaining track is copied losslessly.
Your file never leaves your device. All processing happens right in your browser, and nothing is uploaded to a server.
The audio track is copied unchanged into a new file while the video stream is dropped. No re-encoding means no quality loss and near-instant results, with the file shrinking to a small fraction of the original.
Compared with extraction (which decodes and converts), this keeps the original audio exactly as encoded, typically AAC.
Podcasts published as video, recorded concerts where only the sound matters on the go, lecture videos for listening during commutes, and meeting recordings archived as audio to save space.