Convert MKV to MP3
Extract just the soundtrack from an MKV video as an MP3 audio file.
- Your MKV file never leaves your device
- No sign-up, no watermark, no daily quota
- Handles files up to about 900 MB — your browser's memory ceiling
What happens when you convert MKV to MP3
Pulls the audio out of a Matroska file and encodes it to MP3 at 192 kbps with LAME. The video is discarded rather than decoded frame by frame, which makes this far quicker than converting the video itself even for a long file.
Good for
- Extracting a soundtrack or score from a video file
- Getting the audio from a recorded talk or stream for listening on the move
- Producing an audio-only copy to save space
Worth knowing
- Only the first audio track is used; alternate language tracks are ignored.
- If the file has no audio track the converter says so rather than producing an empty MP3.
- Re-encoding from an already-compressed source is lossy; the result cannot exceed the original's quality.
MKV to MP3, answered
How do I convert MKV to MP3?
Drop your MKV file into the box above (or click to browse), make sure MP3 is selected as the target format, press Convert, then download the result.
Is this MKV to MP3 converter really private?
Yes. The conversion runs entirely in your browser — your MKV file is never uploaded to any server, so nobody but you ever sees it.
Is converting MKV to MP3 free?
Completely free — no watermarks, no sign-up and no daily quota. Processing happens on your own device, so there are no server costs to pass on to you.
Can I convert multiple MKV files at once?
Yes — drop as many files as you like. Convert them individually or use "Convert all", then download everything as a single ZIP.