How do I get a WAV out of a video?

Leave From on MP4 and To on WAV, press Open audio or drop the video on the stage, choose a track if it has more than one, press Convert and then Download.

Why WAV rather than MP3?

WAV avoids a second lossy encode, so it is the better input for editing, mixing or transcription software. It is much larger: one minute of 44.1 kHz stereo is 10.1 MB.

What if the video has no sound?

It is refused before any work starts, with a message saying the file has no audio track.

MP4 to WAV Converter

Open an MP4 and this page lists its audio tracks, decodes the one you pick and writes it as an uncompressed 16-bit WAV, ready for an editor. The picture is never decoded, so a long clip's soundtrack comes out quickly, and a MOV or WebM video opens the same way. Nothing is uploaded.

Open an MP4, MOV or WebM file

· or drop one anywhere on the stage

Never uploadedNo accountUp to 50 MBUp to 10 minutes

From · opens MP4, MOV or WebM

Bit depth

Sample rate

Channels

Download

Ready. Choose an MP4, MOV or WebM file, or drop one on the stage.

Audio tracks are listed before extraction, the video is never decoded, and a file with no audio track is refused. A MOV or WebM video opens here too. The output is uncompressed 16-bit PCM at the sample rate you choose, which does not restore anything a lossy file already lost: it is a larger file, not a better one.

What the bytes sayread from the first bytes of the file, never from its extension
Open a file and its container is identified before anything is decoded.
Output sizeexact arithmetic for PCM, an estimate for MP3
Open a file to size the output.
Decoderasked of this browser before a conversion starts
A codec with no decoder here is named up front, not halfway through.

The From control is a mode, not a guess: the first bytes of the file are read and checked against it, so a file that was renamed is refused with what it actually is. A bare AAC opens in M4A mode, and a FLAC in WAV mode. Changing the sample rate resamples by linear interpolation, and changing the channel count averages a stereo pair down or copies a mono channel to both sides.

Two open source parts do the heavy lifting. Containers are parsed and audio is decoded by Mediabunny 1.55.7 under the MPL-2.0 (licence text, the exact package, source). MP3 encoding is lamejs 1.2.7 under the LGPL-3.0 (licence text, the exact package, corresponding source). Both are bundled unmodified at those versions and loaded from this page, never from another service.

Common questions

How do I get a WAV out of a video?: Leave From on MP4 and To on WAV, press Open audio or drop the video on the stage, choose a track if it has more than one, press Convert and then Download.
Why WAV rather than MP3?: WAV avoids a second lossy encode, so it is the better input for editing, mixing or transcription software. It is much larger: one minute of 44.1 kHz stereo is 10.1 MB.
What if the video has no sound?: It is refused before any work starts, with a message saying the file has no audio track.

Files are decoded and re-encoded in your browser, so nothing is uploaded. Converting cannot restore detail a lossy file already lost, and an MP3 output is a lossy encode of its own. Which formats can be decoded depends on your browser, and this page checks the file's actual bytes and its codec before starting rather than trusting the extension.