How long does conversion take?

Audio extraction is usually faster than real-time. ffmpeg.wasm is downloaded once (~25 MB) and cached by the browser.

Is my video uploaded?

No — ffmpeg.wasm runs inside your browser. The MP4 is processed locally and never sent to any server.

192 kbps is transparent for speech and most music. 128 kbps is fine for podcasts. 320 kbps for archival quality.

Yes. Works on Android Chrome and iOS Safari — pick any video from your gallery.

Extract the MP3 audio track from any MP4 or MOV video file at adjustable bitrate using ffmpeg.wasm — fully in your browser, no upload needed.

100% client-side · no upload

MP4 video file

Settings MP3 bitrate

Load a file to begin.

How long does conversion take?: Audio extraction is usually faster than real-time. ffmpeg.wasm is downloaded once (~25 MB) and cached by the browser.
Is my video uploaded?: No — ffmpeg.wasm runs inside your browser. The MP4 is processed locally and never sent to any server.
Which bitrate should I choose?: 192 kbps is transparent for speech and most music. 128 kbps is fine for podcasts. 320 kbps for archival quality.
Does it work on mobile?: Yes. Works on Android Chrome and iOS Safari — pick any video from your gallery.

Last updated: 2026-05-20 By jarvisbox