Convert MKV to MP3 online
Convert a MKV file to MP3 directly in your browser — the file is never uploaded to a server.
or click to select it
Pull the audio out of an MKV file — the Matroska container behind most downloaded and ripped movies and TV episodes — and save it as an MP3, without needing a media player that can handle a multi-track video file.
MKV (Matroska) is an open container built to hold more than one video, audio and subtitle track at once — a ripped movie might ship with the original-language audio, a dubbed track and several subtitle files bundled together. The tool takes the default audio track, discards the video and every subtitle track, and re-encodes that audio as MP3.
Use cases
- Get just the audio commentary or soundtrack from a ripped movie file.
- Turn a downloaded TV episode into an MP3 to listen to like a podcast.
- Extract audio from an MKV when your device can't play the video container at all.
How it works
- 1
Upload your MKV file
Drop in the file or select it from your device.
- 2
Adjust the bitrate if you want
A high automatic quality is used by default; set a specific bitrate in the options if you need a smaller file.
- 3
Download the MP3
Once it's done, download the resulting audio file.
Technical details
Runs ffmpeg.wasm in your browser. Ripped or downloaded MKV files typically carry their audio as AC3, DTS or AAC — codecs chosen for disc-quality surround sound rather than web playback. Converting to MP3 collapses that down to a compact stereo file that any device can play, at the cost of the surround channels.
Frequently asked questions
What happens if my MKV has more than one audio track?
The tool converts the default audio track — usually the main language track — and leaves the others out; it doesn't let you pick between multiple tracks.
Is there a file size limit?
Videos up to 300 MB work reliably on most devices; larger files may exhaust the browser's available memory.