Extract MP3 audio

MP4 to MP3 Converter

Extract audio from an MP4 and save it as an MP3 file. Everything runs locally in your browser.

Audio extraction workspace

Pull the soundtrack or voice track out of an MP4.

Loading conversion engine...

How it works

1 Choose an MP4 file.
2 The browser extracts the audio track.
3 Download the result as an MP3.

FAQ

Is my file uploaded anywhere?

No. The conversion runs in your browser with WebAssembly, so the selected file stays on your device.

Why can conversion take a while?

Large videos need to be decoded and encoded locally. Keep the tab open while the browser finishes the export.

Does the tool add a watermark?

No. The exported file is watermark-free.

What if my MP4 has no audio?

The export will fail if the source video does not contain an audio track.

Want professional polish?

The browser tools are great for quick format work. Aufzeichna's desktop app is built for polished screen recordings with smooth cursor motion, cinematic zoom, and export control.

Check out the desktop app