Convert a video to WAV
WAV stores sound uncompressed, as 16-bit PCM samples, which is why editors, DAWs and transcription tools take it without converting. This writes your video's sound as a WAV at its own sample rate and channel count.
Your file never leaves this device. Everything runs in your browser.
How it works
- Drop your video.
- Pick MP3, WAV or M4A. The tool says whether the sound is copied or re-encoded.
- Press Extract and download the sound file.
Questions
How big will the WAV be?
Uncompressed 16-bit sound takes about 11.5 MB a minute at 48 kHz stereo and 10.6 MB at 44.1 kHz, many times the size of the same sound in the video.
Is a WAV better quality than the sound in my video?
No. It can't bring back what the video's compression removed. What it does is stop there: nothing is compressed again, which is why editors ask for WAV.
Which format should I pick?
MP3 plays on almost anything. WAV is uncompressed, the format editors and DAWs take without converting. M4A is AAC sound in an MP4 container: it's what most phones and cameras record, so it's usually copied rather than re-encoded.
Does extracting lose quality?
Not when the sound is copied into an M4A, and not in a WAV, which stores the decoded sound uncompressed. An MP3, or an M4A made from sound that isn't AAC, is re-encoded at 192 kbps, which keeps music and speech clear but, like any re-encode, isn't bit-for-bit the original.
Is there a length limit?
Files up to 2 GB, and no limit on length: sound is quick to encode. A WAV gets large, though: about 11.5 MB a minute for 48 kHz stereo.
Can I keep only part of the sound?
Trim the video first with Trim a video. Its fast mode cuts without re-encoding. Then drop the trimmed file here.
Does my video get uploaded?
No. The sound is read and written in your browser, on your device.
Which browsers does it work in?
Current Chrome, Edge, Safari and Firefox. Browsers have no MP3 encoder of their own, so the page loads LAME, the open-source MP3 encoder, compiled to WebAssembly (about 300 KB, from this site) the first time you make an MP3. If your browser can't read the sound in your file, the tool says so before it starts.