FFmpeg Cookbook

Audio Extractor

Pull the audio track out as MP3 / WAV / AAC. Useful when you want music, voice, or SFX from a video.

Fully local processing — your file never leaves the browser
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Drag & drop a video here, or click to select
Supported: MP4, MOV, AVI, MKV, WebM, and more / Max 500 MB
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.MP3
Universal compatibility
128kbps VBR
.WAV
Uncompressed, lossless
Larger file size
.AAC
High efficiency
128kbps, great for iOS
MP3: Universal compatibility — plays on virtually all devices.
Extracting… 0%
Popular uses
Extract MP3 from videoSave meeting or lecture audioPrepare narration or BGM assets

What this tool does

  • MP3 / WAV / AAC output
  • In-browser preview before download
  • Local processing

How to use

  1. 1

    Pick a video

    MP4 / MOV / MKV.

  2. 2

    Pick format

    MP3 (universal), WAV (lossless), AAC (efficient).

  3. 3

    Extract

    Preview then download.

What each setting means

MP3
Most compatible, plays everywhere.
WAV
Uncompressed — best for editing pipelines.
AAC
Smaller than MP3 at equivalent quality.

Recommended settings

Voice / narration
MP3 128kbps
Plenty for speech.
Music
MP3 320kbps or WAV
Music wants high bitrate or lossless.
Pre-edit master
WAV
No generation loss across edits.

Common pitfalls

Symptom: Output too quiet

Cause: Source recording is quiet.

Fix: Run the Volume Normalizer.

Symptom: One-sided audio

Cause: Mono / unusual channel layout.

Fix: Extract as WAV and fix in an audio editor.

Symptom: MP3 too big

Cause: Set to 320kbps.

Fix: 128kbps is half the size.

Equivalent FFmpeg commands

Reference commands you can run on the desktop FFmpeg CLI.

MP3 (128kbps)
ffmpeg -i input.mp4 -vn -c:a libmp3lame -b:a 128k output.mp3
WAV (lossless)
ffmpeg -i input.mp4 -vn -c:a pcm_s16le output.wav
AAC (efficient)
ffmpeg -i input.mp4 -vn -c:a aac -b:a 128k output.m4a

Browser support & limits

  • First audio track only
  • Up to 500MB input

Privacy

This tool runs ffmpeg.wasm directly in your browser. Files never leave your device — everything runs locally. Read the privacy policy →

Frequently asked questions

Copyrighted music?

Personal use is generally fine; redistributing or publishing usually requires rights clearance.

Multiple audio tracks?

Currently extracts the first track. Use FFmpeg directly for multi-track selection.

Related tools

Related FFmpeg recipes

What to do next