Extract MP3 audio from video
The audio track, liberated — lectures, music, interviews, podcasts pulled from any video without the video ever leaving your device.
Drop your video or audio here
or
MP4, MOV, WebM, MKV, AVI, MP3, WAV and more — any size, no upload
🔒 Files never leave your device — everything runs in your browser.
Sometimes the video is just packaging: a recorded lecture you want on your commute, an interview to quote, a concert clip for the car, a podcast episode someone only published as video. This tool takes any common video format, discards the pictures, and gives you a clean high-quality MP3 that plays on absolutely anything made this century.
Everything happens in your browser — the video is never uploaded, which also makes this the fastest way to do it: no waiting for a gigabyte lecture recording to crawl up to a server. Long recordings are fine, and if the source audio is already MP3 inside the video, it is extracted untouched with zero quality loss.
How it works
- Drop your file
Any common format, any size. Nothing is uploaded — the tool runs in your browser.
- Convert
Compatible files are repackaged instantly with zero quality loss; others are hardware-transcoded at high quality.
- Download
Your converted file is ready on your device — nothing to wait for, nothing to delete from a server.
Frequently asked questions
What quality is the extracted MP3?
High-quality encoding suitable for music and speech alike. If the video's audio track is already MP3, it is copied out losslessly — you get the exact original audio, marked with a lossless badge.
Can I extract audio from a very long recording?
Yes — a three-hour lecture works fine, because nothing uploads. The extraction runs faster than the recording's duration on typical hardware.
Is extracting audio from a video legal?
For your own recordings, lectures you have access to, and content you have rights to — of course. For copyrighted music or others' content, the same rules apply as for any download: check the license and your local law. The tool itself is neutral: it only processes files you already have.
Is my file uploaded to a server?
No. ConvertUno runs entirely in your browser on your own device. Your file never leaves your computer or phone — there is no upload at all.
Is it really free, with no watermark?
Yes. Processing happens on your device, so serving you costs us almost nothing — no watermark, no account, no file-size limit, no daily quota.