Extract Audio from Video (Free, Online, No Upload)

Pull the audio track out of any video file and save it as MP3, WAV, AAC, FLAC, or OGG. The tool runs entirely in your browser, so your files never get uploaded anywhere. Completely free, no account required.

Try it in your browser

Loading FFmpeg engine... (~31 MB)

How to extract audio from video online

1Drop your video file into the tool above, or click to browse your files.
2Pick an output format. Use the copy option for original quality, or choose MP3, WAV, AAC, FLAC, or OGG.
3Click extract and download your audio file. Done.

About AAC format

Audio extraction means pulling the sound track out of a video file's container. A video file like MP4 or MKV holds separate streams for video and audio, and this tool strips away the video part and saves just the sound.

Which output format to pick depends on what you need. MP3 is the smallest and works everywhere, making it a good default for sharing or listening. WAV is uncompressed and lossless, so it's the right choice if you plan to edit the audio afterward. AAC gives you better quality than MP3 at the same file size and is the standard format on Apple devices. FLAC is lossless like WAV but compressed, so it's roughly half the size with zero quality loss. OGG is an open-source alternative to AAC with similar quality.

If you pick "copy" as the codec, the tool skips re-encoding entirely. It just copies the original audio stream into a new file, which is faster and preserves the exact original quality.

Use the API

curl -X POST https://renderio.dev/api/v1/run-ffmpeg-command \
  -H "X-API-KEY: ffsk_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
  "ffmpeg_command": "-i {{in_video}} -vn -c:a copy {{out_audio}}",
  "input_files": {
    "in_video": "https://example.com/input.mp4"
  },
  "output_files": {
    "out_audio": "output.aac"
  }
}'

Need an API key? Get your free API key to start processing files programmatically.

Common Variations

Extract as MP3

-i input.mp4 -vn -c:a libmp3lame -q:a 2 output.mp3

Extract as WAV (lossless)

-i input.mp4 -vn -c:a pcm_s16le output.wav

Extract as FLAC

-i input.mp4 -vn -c:a flac output.flac

Extract audio from a specific time range

-i input.mp4 -ss 00:01:00 -t 60 -vn -c:a copy output.aac

Frequently Asked Questions

Is this audio extractor really free?+

Yes, completely free. No account, no credit card, no hidden limits. Use it as many times as you want.

Are my files safe? Where does my video go?+

Your files never leave your device. The tool runs in your browser, so nothing gets uploaded to any server. We never see or store your data.

What's the maximum file size?+

There is no file size limit. Since everything runs on your own device, the only constraint is your computer's available memory. Most machines handle files up to several GB without issues.

What audio formats can I save to?+

MP3, WAV, AAC, FLAC, and OGG. Use the variations below the tool to pick your format, or use the copy option to keep whatever codec the video already contains.

Does this work on iPhone or Android?+

Yes. It works in any modern browser on any device: Chrome, Safari, Firefox, and Edge on both desktop and mobile.

Can I extract audio from just part of the video?+

Yes. Use the time range variation to set a start time and duration. That way you grab only the section you need instead of the full track.

Will the extracted audio sound the same as the original?+

If you use the copy option, the audio is pulled out without any re-encoding. You get the exact original quality, bit for bit. Re-encoding to a different format like MP3 may reduce quality slightly depending on the bitrate you choose.

What video formats are supported as input?+

Any format your browser can read: MP4, MOV, WebM, MKV, AVI, and more. If you can play it in your browser, you can extract audio from it.

Privacy

Your video files stay on your device the entire time. The tool processes everything locally in your browser. No files get uploaded to any server, nothing is stored, and nothing is tracked.

Related Operations

Need to process at scale?

Automate this with the RenderIO FFmpeg API. Process thousands of files programmatically or through no-code video automation.

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