MP4 to MP3
Extract the sound from a video — a talk, a song, a voice memo someone sent as video — and download it as a regular MP3. Nothing is uploaded.
How this works without uploading anything
Your browser already contains the decoders needed to play the video — this tool simply asks it to decode the audio track, then re-encodes that sound as MP3 with JavaScript, all on your own device. That's also why it's fast: no upload, no queue, no server.
Is my file uploaded anywhere?
No — decoding and MP3 encoding both happen entirely in your browser. The file never leaves your device.
Which bitrate should I pick?
192 kbps is transparent for most listening. Pick 320 kbps for music you care about, or 128 kbps for speech where file size matters more.
Is there a length limit?
Around 45 minutes — the decoded audio has to fit in your device's memory. For a feature-length film soundtrack, use a desktop app instead.