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Video to MP3 Converter (Free, Online, No Upload)

Pull the audio from any video file and save it as MP3. Everything runs in your browser, so your files never leave your device. Completely free, no account required.

Try it in your browser

Loading FFmpeg engine... (~31 MB)

How to video to mp3 converter online

  1. 1Drop your video file into the tool above, or click to browse your files.
  2. 2Pick a quality preset or set a custom bitrate. The defaults work well for most cases.
  3. 3Hit convert and download your MP3 file. That's it.

About MP3 format

MP3 is a compressed audio format that balances sound quality with small file sizes. It's been around since the early 1990s and works on virtually every device, player, and operating system.

Extracting MP3 audio from video is useful in a lot of situations. You might want to save a podcast episode from a video recording, grab the audio from a concert clip, make a ringtone, or pull dialogue for editing. Instead of keeping the full video file, you get just the audio at a fraction of the size.

Bitrate controls the tradeoff between quality and file size. 320kbps is the highest MP3 supports and sounds nearly identical to the original. 128kbps works fine for speech and casual listening. For most music, 192kbps hits the sweet spot. VBR (variable bitrate) mode adjusts automatically, using more data for complex sections and less for silence.

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 libmp3lame -q:a 2 {{out_audio}}",
  "input_files": {
    "in_video": "https://example.com/input.mp4"
  },
  "output_files": {
    "out_audio": "output.mp3"
  }
}'

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

Common Variations

High quality 320kbps
-i input.mp4 -vn -c:a libmp3lame -b:a 320k output.mp3
From MKV source
-i input.mkv -vn -c:a libmp3lame -q:a 2 output.mp3
Mono for podcasts or speech
-i input.mp4 -vn -ac 1 -c:a libmp3lame -b:a 96k output.mp3
Extract a specific segment
-i input.mp4 -ss 00:00:30 -t 60 -vn -c:a libmp3lame -q:a 2 output.mp3

Frequently Asked Questions

Is this video to MP3 converter really free?+
Yes, 100% free. No account, no credit card, no hidden limits. You can convert as many files as you want.
Are my files safe? Do you upload anything?+
Your files stay on your device the entire time. The conversion runs locally in your browser. Nothing gets uploaded to a server, and we never see or store your data.
What's the maximum file size I can convert?+
There's no file size cap. Since the tool runs on your own device, the only limit is your available memory. Most phones and laptops handle files up to a few gigabytes without issues.
Does this work on iPhone or Android?+
Yes. It works in any modern browser on any device: Chrome, Safari, Firefox, Edge. Desktop, phone, or tablet.
Can I choose the audio quality or bitrate?+
You can. Pick from presets like 320kbps (high quality), 192kbps (good balance), or 128kbps (smaller file). You can also set a custom value if you need something specific.
What video formats can I convert to MP3?+
Pretty much all of them: MP4, MOV, MKV, WebM, AVI, FLV, and more. If your browser can play it, this tool can extract the audio.
Can I extract just part of the audio?+
Yes. Set a start time and duration to grab only the section you need. Useful for pulling a specific song from a long video or trimming silence from the beginning.
What's the difference between MP3, WAV, and AAC?+
MP3 is compressed, so files are small and play on basically everything. WAV is uncompressed and much larger, but keeps every detail for editing. AAC sounds slightly better than MP3 at the same file size but has less universal support.

Privacy

Your files never leave your device. The conversion happens right in your browser, not on a remote server. Nothing is uploaded, stored, or tracked.

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