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🎵 Extract Audio from Video

Pull the audio track out of any video file and save it as MP3 or WAV — directly in your browser, no server, no account, no file size limits imposed by a cloud service.

Load video
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Drop a video here, or click to browse
MP4, WebM, MOV … audio extracted in your browser

About

This tool uses ffmpeg.wasm — a WebAssembly port of the industry-standard FFmpeg library — to decode your video and remux or re-encode the audio track entirely on your device. The engine (~30 MB) is downloaded once and cached in the browser; after that it works offline without any internet connection. For MP3 output, libmp3lame is used and you can choose the bitrate (64–320 kbps) to balance file size and audio quality. For maximum fidelity, select WAV to get a lossless, uncompressed PCM copy of the source audio. No file is ever sent to a server.

How to use

  1. Click the upload area or drag and drop a video file (MP4, MKV, MOV, AVI, WebM, and more).
  2. On first use, the browser downloads the ffmpeg.wasm engine (~30 MB) and caches it — this takes a few seconds once.
  3. Select the output format: MP3 for broad compatibility, or WAV for lossless quality. For MP3, choose your preferred bitrate (64–320 kbps).
  4. Click Extract Audio. ffmpeg.wasm processes the file locally and shows a progress indicator while it works.
  5. Download the extracted MP3 or WAV file to your device. The original video is not modified.

FAQ

Is my video uploaded to a server?
No. ffmpeg.wasm runs entirely inside your browser. Your video file never leaves your device.
Why does it take a moment to start the first time?
The ffmpeg.wasm engine (~30 MB) must be downloaded once. After that it is cached by your browser and loads instantly, even offline.
Which video formats are supported?
MP4, MKV, MOV, AVI, WebM, FLV, and most other common video containers. Any format that FFmpeg can decode is supported.
What is the difference between MP3 and WAV output?
MP3 uses lossy compression (libmp3lame) — smaller file, slight quality reduction depending on bitrate. WAV is lossless PCM — identical quality to the source, but larger files. Use MP3 for sharing and WAV for editing or archiving.
Does it work offline after the first load?
Yes. Once ffmpeg.wasm is cached in your browser, you can extract audio from videos with no internet connection at all.