Tooooolbox

MP4 to MP3

Pull the audio track out of a video and download it as an MP3. Drop your MP4 (or MOV, WebM, MKV), pick a bitrate, and get the audio only. Everything runs in your browser — your video is never uploaded.

100% private — no upload
Unlimited
Free

Frequently asked questions

No. The audio is extracted in your browser with FFmpeg in WebAssembly. Your video never leaves your device — no upload, no account.

MP4, MOV, WebM, MKV and most common containers. Only the audio track is decoded and re-encoded to MP3.

Audio extraction is fast since the video frames are discarded. The first run downloads the engine once; after that it's quick, even for long videos.

Yes. Pick 128 kbps for music videos, or lower for podcasts and talks to get a smaller file.

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