MP4 to MP3 Converter — Extract Audio from Video Online Free
Pull the soundtrack out of a video and save it as a real MP3 file. The audio plays through once in your browser while it is captured and encoded — nothing is uploaded.
MP4, WebM, MOV and other formats your browser can play. The video must have an audio track — silent videos produce no MP3.
Output is a genuine MP3 file (MPEG Layer III), encoded in your browser with the open-source lamejs encoder.
Your result will appear here
Extracted audio
Output format: MP3 (MPEG Layer III). Plays in every music player and phone.
How to use
- Choose a video file — it stays in your browser and is never uploaded.
- Pick the MP3 quality, then click Extract MP3. The video plays through once while its audio is captured.
- Download the MP3 file and use it in any music player.
Frequently asked questions
Is the download a real MP3 file?
Yes. The video's audio is captured as raw sound samples and encoded into a genuine MP3 file with the open-source lamejs encoder, right in your browser. It is not a renamed video or audio container.
Why does extraction take as long as the video?
The audio has to play through in real time while it is captured, so a 3-minute video takes about 3 minutes. Keep the tab open and audible while it runs — muting the tab can stop the capture.
What if my video has no sound?
Then there is nothing to extract. The tool checks the captured audio and tells you if it is silent, instead of handing you an empty MP3.
Is my video uploaded anywhere?
No. The video is read, played and encoded entirely on your device. Nothing is sent to a server, and closing the page deletes everything.