Extract Audio from Video – Free Online Tool
Extract audio track from video files. Save audio in various formats including MP3, AAC, and WAV.
Example Output
Demuxes and (optionally) re-encodes the audio track. Stream-copy when output format matches source codec — instant, lossless.
concert.mp3 (45 min, 192 kbps, ~62 MB) — or .wav / .aac / .ogg
What is Extract Audio from Video?
Pull the audio track out of any video file into MP3, WAV, AAC, OGG, or FLAC. When the output format matches the source codec, the extraction is a lossless stream-copy (instant); otherwise the tool re-encodes at a bitrate you choose. Useful for podcasts, transcription prep, or simply listening on the go.
Why use this tool?
- 100% free with no hidden costs or daily limits
- Works offline after the first page load
- Lightweight page weight that loads quickly even on slow connections
- FFmpeg WASM means the same encoder that powers desktop tools, running in your browser
- First-load downloads the WASM core once (~30 MB), then subsequent edits are fast
How to use
- Upload your video file
- Select output audio format
- Click "Extract Audio"
- Download the audio file
Examples
Podcast from a Zoom recording
Pull AAC audio out of a meeting MP4 as a lossless M4A — no re-encoding, identical quality, smaller file.
Music WAV for editing
Extract uncompressed WAV from a concert MP4 for editing in Audacity / Logic Pro.
Transcription source
Strip audio to FLAC and feed it to Whisper for the smallest input file that's still lossless.
Common use cases
- Converting video lectures into audio podcasts
- Preparing source audio for transcription
- Extracting music for editing or sampling (own content)
- Reducing storage when only audio matters
- Creating audio-only versions for low-bandwidth listeners
Troubleshooting
- Output bitrate is lower than the source
- Pick "match source bitrate" instead of fixed 128 kbps. The default cap of 128 is conservative — bump to 192-320 for music.
- Multiple audio tracks — got the wrong one
- Pick the audio-track index in advanced options. Default is track 0; track 1 is usually the second language / commentary.
- Output file too large
- Switch from WAV/FLAC (lossless, huge) to MP3 / AAC (lossy, 10× smaller). 128 kbps MP3 is fine for spoken word.
Frequently Asked Questions
You can extract audio in MP3, AAC, WAV, OGG, FLAC, and other popular formats. MP3 is the most universally compatible; WAV/FLAC are lossless if quality matters more than size.
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