# Extract audio from video: free, in your browser, no upload

> Extract audio from a video in your browser. Save the soundtrack of an MP4, MOV or WebM as the original track with no quality loss, or as WAV for editing. Nothing is uploaded.

URL: https://cutfac.com/tools/extract-audio-from-video  
Last updated: 2026-10-28  
Language: [한국어](https://cutfac.com/ko/tools/extract-audio-from-video)

Drop in a video and save its sound: the original track copied out as it is, or WAV for an editor. The video is read in your browser and never uploaded.

Runs in your browser. Nothing is uploaded.

## How to use it

1. **Add a video.** Drop an MP4, MOV, WebM or any video your browser can play. It isn't uploaded.
2. **Pick the format.** Original audio keeps the track exactly as it is in the video. WAV decodes it into uncompressed audio.
3. **Extract and download.** Play the result to check it, then download it.

## Original or WAV

Most MP4 and MOV files carry AAC audio. Original audio copies that AAC track into an M4A file without decoding it, so it's as good as the video's sound, small, and done in seconds. WebM usually carries Opus, which is saved as Ogg.

WAV decodes the track into uncompressed 16-bit audio. The file is about 11 MB a minute at 48 kHz stereo, but every editor, DAW and transcription tool opens it, and cutting it never adds compression.

- Background music or a voiceover to reuse in another edit: original audio.
- Cleaning up dialogue, mixing, or loading into a DAW: WAV.
- A file for a tool that only takes WAV: WAV.

## With ffmpeg

The same jobs on the command line. -vn drops the video.

- Copy the track without re-encoding: ffmpeg -i input.mp4 -vn -c:a copy audio.m4a
- Decode to 16-bit WAV: ffmpeg -i input.mp4 -vn audio.wav
- Only seconds 2 to 5: ffmpeg -i input.mp4 -vn -ss 2 -to 5 part.wav

## Sources

- [FFmpeg documentation](https://ffmpeg.org/ffmpeg.html)

## Questions

### Is my video uploaded?

No. Your browser reads the video and writes the audio file itself. Nothing is sent anywhere.

### Does extracting lower the quality?

Original audio doesn't: the track is copied, not re-encoded. WAV is decoded from that track, so it sounds the same, just larger.

### Why is my file M4A and not MP3?

The audio in most MP4 and MOV files is AAC, and M4A is AAC's own file. Turning it into MP3 would mean re-encoding and losing a little quality. M4A plays in almost every app and on every phone.

### Which videos work?

MP4, MOV, WebM and MKV with audio your browser can decode, which covers AAC, Opus and MP3. If a file fails, try Chrome, which decodes the most formats.

### The video has no sound. What happened?

Some screen recordings and exported clips have no audio track at all. The tool says so instead of making a silent file.