🎬 Extract Audio from Video
Upload a video and download just its audio track as MP3 or WAV — no video re-encoding, nothing uploaded to a server.
About Extract Audio from Video
This tool pulls the audio track out of a video file — a recorded meeting, a phone video, a screen recording — and saves it as a standalone MP3 or WAV file, without needing any video editing software. It's useful when you only need the sound (a lecture, an interview, a voice memo someone sent as video) and want a smaller, audio-only file instead of keeping the whole video around.
It works the same way as this site's audio converter: the video file's bytes are handed directly to the Web Audio API's decodeAudioData, which decodes just the audio track's samples and discards the video frames entirely — there's no video decoding or re-encoding involved, which keeps it fast even for a large video file. Those decoded samples are then written out as WAV or encoded to MP3 with lamejs, exactly as with any other audio source.
Whether this works depends on whether your browser's media pipeline can decode the specific audio codec inside your video's container — MP4 files with AAC audio and WebM files with Opus or Vorbis audio both work reliably in current Chrome and Firefox. Less common container/codec combinations may fail to decode; if that happens, re-exporting the video with a standard codec (or converting it with desktop software first) usually resolves it.
Frequently asked questions
Which video formats work?
MP4 with AAC audio and WebM with Opus or Vorbis audio both decode reliably in current browsers. Less common combinations may not decode — if extraction fails, try a video exported in one of these standard formats.
Does this re-encode or process the video itself?
No — only the audio track is decoded and read. The video frames are never processed, which is why extraction is fast even for a large video file.
Will the extracted audio be perfectly in sync with the original video?
Yes — the full, unmodified audio track is decoded from start to end, so its length and content match the video's original audio exactly.
Can I extract audio from a very large video file, like a 2-hour recording?
Yes, though the whole file needs to be decoded in your browser's memory first, so a very long or high-resolution video will take longer and use more RAM than a short clip.
Is the video uploaded to a server to extract the audio?
No — the video file is read and decoded locally in your browser using the Web Audio API. Nothing is uploaded anywhere.