Extract the audio track from an MP4 video as an MP3 file. Runs entirely in your browser — the video is never uploaded.
Your file never leaves your device. Nothing is uploaded to a server.
You'll get a clear error message instead of a broken file — there's simply nothing to extract if the video is silent.
It depends on the video length and your device's speed, since the conversion runs locally using WebAssembly rather than a server. Longer videos take proportionally longer.
The extracted MP3 keeps the original audio track's quality — this tool extracts and re-encodes, it doesn't artificially boost or degrade quality beyond standard MP3 compression.
Currently only MP4 input is supported. Support for other video containers may be added later.