Extract Audio from Video

Save the sound of a video as an audio file. By default the audio is copied exactly as it is stored in the video — no decoding, no re-encoding, no quality loss — into the file type that naturally holds it: AAC becomes an M4A, MP3 stays MP3, Opus an .opus file, AC-3 an .ac3 file, FLAC a .flac file, PCM a WAV. If you need a particular format, convert to MP3, WAV, M4A, FLAC or OGG instead. Films with several languages can be split into one file per track. It runs in your browser with the ffmpeg engine (about 30 MB, downloaded the first time); nothing is uploaded.

How to use this tool

1. Choose "Original format" for a perfect copy, or the format you need.
2. Choose the first track, every track, or a track number.
3. Choose one or more videos; the audio is extracted right away.
4. Play the result in the page and download it; every track found is listed.

Formula

Original format: output = the same audio data in its natural container (size ≈ audio bitrate × length ÷ 8)

Copying keeps every bit of the sound, so it is fast and lossless; converting re-encodes it (MP3 and M4A at the chosen bitrate, Vorbis at about 192 kbps, WAV as 16-bit PCM, FLAC lossless). Sound the natural containers cannot hold is saved as MKA (Matroska audio), which VLC and most players open. Surround sound is kept, except for MP3, which is limited to stereo.

Example

A 12-minute phone video with AAC at 256 kbps gives a lossless M4A of 256,000 ÷ 8 × 720 ≈ 23 MB in a few seconds. Converted to MP3 at 192 kbps it would be about 17 MB and take longer, because the sound is decoded and encoded again.