How to Extract Audio from a Video
Pull the audio track out of an MP4, MOV, or WebM file. ffmpeg is the standard tool; we'll show you the exact command.
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Tools in this guide
Command-line
ffmpeg is the standard tool for pulling audio from MP4, MOV, or WebM. Run:
ffmpeg -i input.mp4 -vn -acodec libmp3lame -q:a 2 output.mp3
Flags explained:
-vndrops the video stream-acodec libmp3lameselects the MP3 codec-q:a 2is high quality (0 best, 9 worst)
GUI tools
- VLC: Media → Convert / Save
- HandBrake: video-oriented but can output MP3 / AAC
- macOS: Preview can’t; use QuickTime export (some formats only)
In-browser
In-browser video-to-audio extraction requires WebCodecs API or a large WASM (FFmpeg.wasm). We don’t currently ship one.
Note
When a video has multiple audio tracks (e.g. multi-language), use -map 0:a:N to select the Nth.
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使い方
Open the tool
Open the relevant tool linked below in your browser. The page handles everything client-side.
よくある質問
Does this upload my file?
No. All ToolConvoy tools process files in your browser; nothing is uploaded to a server.
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