Convert MKV to MP3 (extract audio)
Save the music or speech from an MKV video as a MP3 file — the whole sound track or just a part.
Free: up to 2 min of video per file (choose a part with Start/End), up to 720p; GIF up to 20 s. Pro: 5 min, 1080p.
Private by design: this tool works entirely in your browser. Your files are never uploaded to our server. Free, no sign-up, no watermark.
How to use
- Choose an MKV video.
- Check that MP3 is selected; set Start and End to save only a part.
- Press Start.
- Listen to the result and download the MP3 file.
MKV is a flexible container popular for films; many phones, TVs and editors can’t open it.
MP3 is the most compatible sound format — every player and phone opens it.
Frequently asked questions
Is the sound re-encoded?
With “Same as original” the sound track is copied unchanged when the video already contains it in this format; otherwise it is converted with high quality.
Can I cut out just one song or phrase?
Yes. Play the video in the preview, press “Start here” and “End here” at the right moments, then Start.
Is it free?
Yes, free and without sign-up. Very long videos are limited; choose a part with Start and End.