Video to Audio Extractor — Free Online, Extract WAV from MP4/MOV/WebM
Extract audio from MP4, MOV or WebM videos entirely in your browser. Uses Web Audio API to decode and re-encode audio tracks into downloadable WAV files. Batch processing, no upload, no signup.
Frequently Asked Questions
How does the browser extract audio from a video file?
The tool reads your video file as an ArrayBuffer using the FileReader API, then passes it to AudioContext.decodeAudioData(). This decodes the native audio track into an AudioBuffer entirely in your browser. The raw PCM samples are written into a WAV container and downloaded — no server contact at any step.
What audio quality does the extracted WAV have?
WAV output preserves the source sample rate (typically 44100 Hz or 48000 Hz) and bit depth (16-bit PCM) decoded by the browser's native codec. Since WAV is lossless and uncompressed, the extracted audio is as faithful to the original as the browser's built-in decoder allows.
Which video formats are supported for audio extraction?
Any video format your browser can natively decode: MP4 (H.264 + AAC), WebM (VP8/VP9 + Opus/Vorbis), and MOV (H.264 + AAC on Chrome/Edge). The tool processes the audio codec specifically — video codec support does not matter for extraction.
Can I extract audio from multiple videos at once?
Yes. Drop or select multiple files and they are added to the processing queue simultaneously. Each file is decoded independently using the Web Audio API. A "Download All as ZIP" button appears when more than one file has been processed.