Back to ToolKnit
Blog Tool Tales

Video to Audio

Extract the audio track from any video file and download as lossless WAV. 100% browser-based. Zero uploads.

No Upload Required Lossless WAV Output MP4 / WebM / MOV Instant Extraction

Drop your video here

or click to browse files from your device

MP4, WebM, MOV, AVI —Up to 500 MB

How It Works

Audio Extraction

The tool uses the Web Audio API to decode the audio track from your video file. The decoded PCM audio data is then encoded into lossless WAV format (16-bit PCM) for download. This happens entirely in your browser —your video never leaves your device.

Supported Formats

Any video format your browser can play is supported: MP4, WebM, MOV, AVI, and more. The extracted audio preserves the original sample rate and includes all audio channels.

Privacy First

Unlike other video-to-audio converters, your video is never uploaded to any server. All processing runs locally using the HTML5 Web Audio API. Close the tab and everything is gone.

Why choose ToolKnit for Video to Audio?

100% Private —No Server Uploads

Everything runs entirely in your browser using the Web Audio API. Your video and audio never leave your device —ever.

Lossless WAV Output

Audio is extracted as a lossless WAV file (PCM 16-bit) at the original sample rate of the video's audio track. WAV is universally supported and preserves full audio quality.

Universal Format Support

Any video format your browser can play is supported: MP4, WebM, MOV, AVI, and more. The extracted audio preserves the original sample rate and includes all audio channels.

Handles Large Files

No hard size limit —modern browsers handle videos up to 500MB easily. For very large files, extraction may take a few extra seconds depending on available memory.

Pro Tips

  • ● WAV is lossless —use it as the master and convert to MP3/AAC later if you need smaller files.
  • ● If extraction fails for a particular video, the codec may not be supported by your browser —try Chrome or Edge for the widest compatibility.
  • ● For batch extraction, repeat the process for each file —everything stays local and the engine is already loaded after the first run.
  • ● Need to compress the resulting WAV? Pair this with our WAV to MP3 tool for a smaller, shareable audio file.

You May Also Like

Explore more free browser-based tools —no signup, no uploads.