Kastavo

Extract Audio from Video (to M4A)

Upload a video and download just the audio, in seconds. Everything runs on your device — nothing is uploaded anywhere.

Your video never leaves your device — extraction happens entirely in your browser.

Not sure? Turn your internet off and try — it still works.

How it works

Extracts just the audio from a video, with nothing to install: 1. Upload your video. 2. Click Extract audio. 3. Download the M4A file it generates. The result comes out as M4A, not MP3 — but works exactly the same in practice: it plays natively on iPhone, Android, Windows, Mac, and in any current audio player or editor. Extraction usually takes just a few seconds, even for longer videos.

Frequently asked questions

Related tools