Download free trialExtract audio from video
Choose a video and save its sound on its own - as an MP3 to share or upload, or as a WAV to edit or mix. It takes MP4, MOV, WebM and MKV files, and the work happens on this device.
The converter runs entirely in your browser - nothing is uploaded, and your video never leaves this device.
MP3 or WAV
An MP3 is small and plays everywhere; it is written at 192 kbps, which is plenty for speech and most music. A WAV is uncompressed, so it is many times larger, but nothing more is lost on the way into it - the one to choose when the sound is going into an editor or a mix. Neither can restore what the video’s own compression already removed.
Questions about extracting audio
- Is my video uploaded?
- No. The file is read and converted in your browser on this device. In some browsers the sound waits in the browser's private storage until you press Save MP3 or Save WAV, and it is deleted when you convert another file or come back to the page.
- Will the quality change?
- An MP3 is re-encoded at 192 kbps, unless the sound is MP3 already, when it is copied out unchanged. A WAV is written uncompressed: 16-bit from compressed sound such as AAC or Opus, and usually at the source's own depth when the sound is uncompressed already.
- Which videos can it read?
- MP4, MOV, WebM and MKV, which covers phones, Macs, screen recorders and most downloads. Within those, the sound has to be in a format the browser can decode, such as AAC, Opus or MP3; if it is not, the tool says so before it starts.
- Can it handle a long recording?
- Yes. The video is read in pieces, so it does not have to fit in memory, and only the sound is written: an MP3 at 192 kbps is about 1.44 MB a minute. In Chrome the file is written straight to the place you choose; in other browsers it waits in the browser's private storage until you save it. A browser with neither can only hold up to 1.00 GB.
- What is kept?
- Only the sound, with the title and date. The picture, location and device details are left out. An MP3 holds one sound track, so a file with more keeps the first one the browser can read, and the tool says so before it starts.
- Which browsers does it work in?
- One that can decode the file's sound, such as Chrome. The MP3 encoder runs as WebAssembly, which Lockdown Mode on a Mac or iPhone turns off. Where a browser cannot do either, the tool says so before it starts.
Exporting the sound from Rooster
Rooster records your screen and camera on your Mac and lets you edit the video by editing its transcript. When you only need the sound, it exports an MP3, an M4A or an uncompressed WAV of the edited project, with the level matched to -16 LUFS, the loudness podcasts are published at - all rendered on your Mac with nothing uploaded. See how audio export works, or you can try Rooster free.
This converter is built on Mediabunny 1.61.6 and its MP3 encoder, by Vanilagy and contributors, used unmodified under the Mozilla Public License 2.0. The MP3 encoder is a WebAssembly build of LAME 3.100, used unmodified under the GNU Library General Public License 2.0; its source is at sourceforge.net/projects/lame.