Video editors, DAWs, samplers and many speech tools want WAV: uncompressed audio that opens everywhere and loses nothing more when you edit it. This saves the soundtrack of an MP4 (or any other video) as a standard 16-bit WAV, converted in your browser so the video stays on your device.
Your file never leaves your device. Nothing is uploaded.
Drop an audio or video file here
Drop an .mp4 (or any video) up to 500MB. It stays on your device.
Conversion runs on FFmpeg, compiled to WebAssembly, inside this browser tab. Licences and source
It keeps exactly what's in the MP4's audio track, with no further loss. It can't add back detail the video's AAC audio never had, but nothing more is thrown away while you edit.
Nowhere. The converter runs inside your browser tab, so the file is read and converted on your own device and saved straight back to it. It is never uploaded to Wave or anyone else, and we never see its name or contents.
About 10MB per minute of stereo audio, so an hour is roughly 600MB. That's why long videos can run out of browser memory as WAV; pick FLAC (lossless, about half the size) or MP3 if that happens.
No. Speech recognition is just as accurate from MP3, and a WAV of a long video can pass the transcriber's 200MB limit. For a transcript, convert to MP3 and click "Transcribe this file for free".
Related: Free Audio Converter That Never Uploads Your File · Free audio transcription · Free YouTube Transcript Generator
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