Pull the soundtrack out of a MP4 video as MP3 audio
Free and unlimited, and nothing is uploaded: it all runs in your own browser. Open Extract Audio
What changes when you convert MP4 to MP3
- Both formats are lossy. Re-encoding adds a second generation of loss, so keep quality high (80+) unless size matters more than fidelity.
- MP4 video animation cannot be expressed in MP3 audio; the first frame is converted as a still image.
- The video’s audio track is extracted and re-encoded to MP3 audio; video frames are discarded.
- MP3 audio encoding exposes a quality control; around 80 is the usual sweet spot.
How to convert MP4 to MP3
- Add your MP4 file — drag it onto the page or choose it. It stays on your device.
- Pick MP3 as the output format and set the quality slider.
- Press convert and download the result — individually or as one ZIP.
Questions
How do I convert MP4 to MP3 for free?
Add your MP4 file on this site, choose MP3, and press convert. The whole conversion runs in your own browser — nothing is uploaded — and the MP3 file downloads straight from your device.
Will converting MP4 to MP3 lose quality?
Both formats are lossy. Re-encoding adds a second generation of loss, so keep quality high (80+) unless size matters more than fidelity.
Does MP3 keep everything MP4 supports?
Yes within the format’s own limits — animation is kept where the target supports it.