Extract audio from video

Pull the soundtrack out of a video as a WAV file — for a podcast edit, a transcript, or just to keep the audio. Decoded on your device; the video is never uploaded.

Why WAV, and what that means for size

Your browser can decode almost any audio it can play, but it has no built-in encoder for compressed formats — so writing an MP3 would mean shipping a large encoder library to your device. Rather than do that, this tool writes WAV, which the browser can produce natively and which every editor, transcription tool and DAW accepts.

The trade-off is size: WAV is uncompressed, roughly 10 MB per minute in stereo at CD quality. Two options cut that sharply when you don't need fidelity — mono halves it, and dropping the sample rate to 16 kHz cuts it further while remaining perfectly good for speech. That combination is what transcription software actually wants, and it produces files about a tenth the size. If you need MP3 for distribution, convert the WAV afterwards in an audio editor.

What it can and can't open

Extraction works with whatever your browser can decode — MP4/AAC, WebM/Opus, MOV, MP3, M4A and WAV all work in current browsers. Unusual containers or codecs may fail to decode, and when that happens the tool tells you plainly rather than silently sending your video to a server. Very long files are decoded into memory, so a feature-length video may be limited by your device's RAM; trimming to a section keeps that manageable.