How to Extract Audio from Video for Free
How to Extract Audio from Video Files: The Short Answer
Open the video in an audio extractor, pick an output format, and download the audio file. Use MP3 if it just needs to play anywhere, WAV if you'll edit it, and M4A to keep the original sound untouched. You can extract audio from video online in your browser, in an editor like iMovie or Clipchamp, or with VLC or ffmpeg.
Maybe it's a lecture you want as a podcast, or a clip with background music you want to reuse. Either way, you only need the sound, not the picture.
Copy or Convert? Picking MP3, WAV or M4A
A video file stores its sound as a separate audio track inside the container (the MP4 or MOV wrapper). To separate audio from video, a tool pulls that track out into a new file. The only real decision is whether to re-encode it.
Copying the stream is the fastest way. The ffmpeg documentation says a stream copy does no decoding or encoding, so "it is very fast and there is no quality loss."
The catch: a copy keeps the original codec. If the video carries AAC audio (a common compressed audio format), the result is an M4A file, not an MP3.
Getting an MP3 means re-encoding. MP3 is a lossy format, so the bitrate decides how much detail survives. Mux's ffmpeg guide gives a simple scale: 128 kbps for acceptable quality, 192 kbps for good, 320 kbps for the highest. A separate guide covers how to convert a video to MP3 step by step.
WAV stores the sound uncompressed. The file size grows a lot, but audio software opens it without decoding. If the sound is headed for a DAW (a digital audio workstation, like Audacity or Logic), convert MP4 to WAV for editing.
| M4A (stream copy) | MP3 | WAV | |
|---|---|---|---|
| Re-encoded | No, if the source is AAC | Yes | Decoded to raw audio |
| Audio quality vs. the original | Identical | Lossy, set by bitrate | No further loss |
| File size | Same as the original track | Set by bitrate | Largest |
| Typical use | Keeping the original sound | Playing on any device | Audio work in a DAW |
The No-Install Way to Extract Audio from Video Online
The Vidmini tool reads your video and pulls the audio from your video on your device. Nothing is uploaded, and there's no account and no watermark.
- Open the page and drop in your video file: MP4, MOV, M4V, WebM or MKV.
- Choose the audio format: MP3 at 128, 192, 256 or 320 kbps, M4A, or 16-bit WAV.
- Download the extracted audio.
When the source is already AAC, the M4A option copies it without re-encoding. That keeps the sound identical to the original video. There's no size limit set by us, though a phone is limited by its free memory and storage.
Extract the audio track in your browser when you have the file ready.
Other Free Ways to Separate Audio from Video
iPhone. Apple documents the method in iMovie, not in the Photos app. Tap the clip in the timeline, tap the Actions button, then tap Detach.
A new blue audio clip appears beneath the video clip, and you can edit it on its own inside your project. Apple's guide stops there: it doesn't describe saving that clip as a separate audio file.
Windows 11. Microsoft's video editor, Clipchamp, lets you detach the audio from a video clip. Its guide says you can then download the audio only, as an MP3.
VLC. This media player runs on Windows, Mac and Linux. It discards any video content and converts the sound to the format you pick. The VLC wiki page on extracting audio covers FLAC, WAV and AC3, but its MP3 section is still marked "TODO!".
ffmpeg. This command-line tool is the most direct route. The -vn option drops the video stream, and -c:a copy keeps the audio as it is:
ffmpeg -i input.mp4 -vn -c:a copy output.m4a
That output name assumes AAC audio. For an MP3, swap in the LAME MP3 encoder, which ffmpeg calls libmp3lame: -c:a libmp3lame -q:a 2 output.mp3. The -q:a scale runs from 0 to 9, and lower means better quality.
When a Video Has More Than One Audio Track
An MP4 or MKV can carry multiple audio tracks: a second language, or a director's commentary. Mux's documentation lists other languages, audio descriptions and commentary as typical uses for these extra tracks.
So after extracting, play the result before you delete the original video. You may have the commentary instead of the music.
Frequently Asked Questions
Can you extract audio from video using CapCut?
Yes. CapCut's phone app can separate the audio from a clip inside its editor. If you only need the sound file, a browser extractor skips the timeline.
How do you extract audio from video files in AVI format?
Vidmini reads AVI through a backup converter: ffmpeg compiled to WebAssembly, which also runs on your device. It's slower than native formats. The first run downloads a 32 MB converter from vidmini.com, and input is capped at 1 GB.
Is audio extraction from a private video safe online?
Many online tools send your file to their server to process it. A browser-based extractor like Vidmini keeps the video on your device, and the page only talks to vidmini.com. Once loaded, it even works offline.