100% Private Client-Side Media Extractor

Extract Audio from Video

Extract high quality MP3 or WAV audio tracks from MP4, WebM, MOV, and M4V video files directly in your web browser.

Drop your video file here or browse

Supports MP4, WebM, MOV, and M4V video files. 100% private in-browser processing.

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100% Private In-Browser Conversion

Your files never touch any remote server or cloud storage.

Local RAM Processing

Conversion is calculated directly on your device CPU using standard HTML5 Canvas API.

Zero Cloud Uploads

No external APIs, databases, or third-party servers see your images at any time.

Works Completely Offline

Once loaded in your browser, you can disconnect Wi-Fi and convert files without internet access.

Client-Side Video Audio Extraction

Extract sound, speech, background music, or podcasts from video recordings instantly.

Universal MP3 Output

Generates widely compatible MP3 audio playable on iOS, Android, Mac, Windows, Linux, and car audio systems.

Real-Time Progress

Monitors audio sample decoding and encoding frame-by-frame with a live visual percentage indicator.

Zero Server Uploads

Your video files stay entirely inside your device RAM. Processing is 100% private and confidential.

How Web Audio API Demuxing Works

When you select a video file, our application uses the Web Audio API AudioContext.decodeAudioData() to parse the video container and extract the underlying audio bitstream. It converts the decoded audio track into uncompressed floating-point PCM audio buffers.

The PCM samples are then encoded in chunked iterations using `@breezystack/lamejs`, producing a standard 44.1kHz MP3 file with your chosen bitrate (up to 320 kbps).

Got Questions?

Frequently Asked Questions

How does client-side audio extraction work?

Our engine uses your web browser native Web Audio API (AudioContext) to demux and decode the video audio stream directly in RAM. It then encodes raw audio samples into MP3 format using a pure JavaScript MP3 encoder, without uploading your video file to any server.

Which video formats are supported for audio extraction?

The tool officially supports MP4, WebM, MOV, and M4V video files. Other container formats like MKV or AVI may work depending on your browser native decoders. If a video file contains no audio track or has an unsupported codec, a clear error message is shown.

What output audio formats and bitrates can I choose?

You can extract audio as universal MP3 (with configurable bitrates: 128 kbps, 192 kbps, 256 kbps, or 320 kbps) or uncompressed WAV for maximum sound quality.

Is my video uploaded to any cloud server?

No, 100% of the extraction and MP3 encoding happens inside your browser RAM. Your video files, audio tracks, and personal data never leave your device.

Why does audio extraction take a few seconds?

Because audio decoding and MP3 re-encoding take real-time mathematical computations. We process the file in small chunks with a live progress indicator (0% to 100%) so you can monitor status without page freezes.