How It Works
Extracting audio from video with JustExtractAudio is simple, fast, and completely private.
Upload Your Video
Drag and drop a video file or click to browse. Supports MP4, AVI, MOV, MKV, and WebM.
Choose Output Format
Select your desired audio format: MP3, WAV, AAC, OGG, or FLAC.
Download Audio
Preview your extracted audio and download it instantly.
The Technology Behind It
JustExtractAudio uses ffmpeg.wasm, a WebAssembly port of FFmpeg — the industry-standard multimedia processing framework used by professionals worldwide.
WebAssembly (Wasm)
WebAssembly lets us run near-native-speed code directly in your browser. This means the same powerful FFmpeg engine runs locally without needing to install anything.
Client-Side Processing
Your video file is read directly from your device into browser memory. The audio extraction happens entirely on your machine — nothing is sent over the internet.
Format Conversion
FFmpeg handles the decoding and re-encoding of audio. Whether you want MP3, WAV, AAC, OGG, or FLAC, the conversion is handled efficiently in real time.
Memory Management
Files are processed in browser memory and automatically cleaned up. Nothing persists after you close the tab — your files are never cached or stored.
Why This Matters for Privacy
Traditional online converters require you to upload your files to their servers. This creates privacy risks, introduces upload/download delays, and often comes with file size limits. By processing everything in your browser, JustExtractAudio eliminates all of these problems. Your files never leave your device.
Supported Formats
Input (Video) Formats
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