Extract Audio from Video
Get the sound out of a video.
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or drag it here
MP4, MOV, WebM, or MKV
- Takes
- MP4, MOV, M4V, WebM, and MKV. AVI and WMV don’t work in a browser — convert them somewhere else first.
- Size
- Any size. Only the sound is read, so even a 2.3 GB video takes about a second. The file you get is just the soundtrack — usually a few percent of the video’s size.
Your files stay on your device
How to use it
Drop a video here to get its sound. Copy it out instantly with no quality lost, or save it as an MP3. Your video stays on your device.
Want the audio from a video — a talk, a song, a voice note sent as a video? Drop the video onto the box above and choose how you want the sound.
“Copy” is the best choice for most people: it takes the sound out exactly as it is, in about a second, with no quality lost. You’ll get an .m4a file (from MP4 or MOV videos) or an .ogg (from WebM), and both play on every phone and computer.
Choose MP3 only if something specific needs it, like an older car stereo or some podcast and DJ apps. It takes a bit longer and loses a little quality.
Videos are often our most personal files. This one never leaves your device — and big files are no problem.
FAQ
Copy or MP3?
Copy, unless a device can’t play the result. It’s instant and loses nothing.
What file will I get?
An .m4a from MP4 or MOV videos, or an .ogg from WebM. Choose MP3 to get an .mp3.
Does it lower the quality?
Not with Copy. MP3 loses a little.
How big a video can I use?
Any size. A 2.3 GB video took about a second here.
Which video formats work?
MP4, MOV, M4V, WebM, and MKV. AVI and WMV don’t work in a browser.
Why is the MP3 option greyed out?
Your browser can’t read the sound in this video (common in some versions of Firefox). Copy still works.
How it worksFor the curious
A video file is a container holding separate, already-compressed streams. Copying reads the container, lifts the audio packets out, and writes them into an audio container — no decoding, so the bytes are exactly the original soundtrack. The video is read off disk in pieces and the picture is skipped, so a 2.3 GB, 15-minute 1080p recording gave up its audio here in about a second holding 17 MB.
MP4 and MOV usually carry AAC (→ .m4a); WebM carries Opus or Vorbis (→ .ogg). The MP3 option decodes and re-encodes already-lossy audio.
Audio codecs begin with a few milliseconds of padding that a video hides with an edit list; a plain audio file has no equivalent, so a copy can start about 20 ms earlier than the video did.
AVI and WMV cannot be demuxed in a browser and are refused. The MP3 option is disabled when the browser has no decoder for the track’s codec — most often AAC on Firefox builds without system codecs — but copying still works because it decodes nothing.