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Tool 08

MP4 → MP3

Audio-only conversion is fast — usually seconds per track.

MP4 → MP3 WebM → MP4
Drop MP4 files to extract audio
up to ~500MB per file · 0 bytes uploaded to our servers

How do I extract MP3 audio from an MP4 video online?

Drop any MP4 (or MOV / M4A) onto the box. We decode the audio track in your browser using FFmpeg compiled to WebAssembly, then re-encode it as MP3. Nothing uploads — not even partially. If the file has multiple audio tracks, the first one is used.