FREE CONVERTER · ON YOUR DEVICE
Convert MP4 to MP3
Add your MP4 file below and press the button: Cocuyo extracts the sound of it to MP3 right in your browser, for free and with no watermark. You only want the sound of your own video: a song you recorded, an interview, a class or a podcast recorded on video.
- Free, no watermark
- Your files never leave your device
- MP3 pre-selected
HOW TO DO IT
Three steps.
Add your MP4 file
Drop it on the box or choose it. Up to 10 videos at once, up to 300 MB and 10 minutes each, as MP3 at 128, 192 or 320 kbps.
Adjust the options
Choose the options you need; the output is MP3.
Download the MP3
Press the button and download each file, or all of them in a ZIP when there are several.
FORMATS
MP4 vs MP3: what changes
You only want the sound of your own video: a song you recorded, an interview, a class or a podcast recorded on video. The audio track is saved as MP3 (192 kbps suits music; 128 kbps suits speech). Use it with your own videos or with permission: it does not download from YouTube or social networks.
| Feature | MP4 | MP3 |
|---|---|---|
| What it is | Video container, usually H.264 with AAC audio. | Compressed audio. |
| Compression | Lossy and very efficient. | Lossy: about 1.4 MB per minute at 192 kbps. |
| Transparency, animation or sound | Video and sound. | Sound only. |
| Compatibility | The most compatible: phones, social networks and TVs. | Universal: phones, cars, speakers and websites. |
| Best for | Sharing and posting video. | Music, podcasts and audio to share. |
MP4 to MP3: common questions
Does converting MP4 to MP3 lose quality?
The audio track is saved as MP3 (192 kbps suits music; 128 kbps suits speech). Use it with your own videos or with permission: it does not download from YouTube or social networks.
How many files can I convert at once?
Up to 10 videos at once, up to 300 MB and 10 minutes each, as MP3 at 128, 192 or 320 kbps.
Does it work on a phone?
Yes, in current mobile browsers (Chrome, Safari, Edge, Firefox). Large files take a little longer on a phone, and the tab should stay open until the download is ready.
Are my files uploaded to a server?
No. The conversion happens inside your browser: the file is read and processed on your device and is not sent to Cocuyo or to any third party. You can check it in your browser’s network tools: your file is not sent.
Is it really free?
Yes. You can try it before signing up; to download the result we ask for a free account, with no subscription. Your free account comes with 30 welcome uses; after that, each use costs 1 credit (top-ups from US$1), and they are unlimited with Basic or Pro. It never adds a watermark.
Learn how to…
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