Convert mkv to mp3
Converted on your device. Files never leave this tab. Output tops out around 2 GB.
Nothing is uploaded
The converter runs inside this page. Cut your network after it loads and it still works.
No account, no daily limit
No sign-up, no daily limit, no watermark, no queue behind other people's files. Batch as many MKV files as you like.
Real MP3 output
Encoded by ffmpeg, the same library the command-line tools use — not a renamed extension.
About MKV
Matroska Video
An open container first released in 2002 that can hold almost any video and audio codec, plus several audio tracks, subtitle tracks and chapters in one file. Use it to keep multiple languages and subtitles together; convert to MP4 for devices that do not read MKV.
About MP3
MPEG-1 Audio Layer III
A lossy audio format developed largely at the Fraunhofer Institute and standardized as part of MPEG-1 in 1993. Its patents expired in 2017, and typical bitrates run from 128 to 320 kbps. Use it when audio has to play everywhere: car stereos, old MP3 players, any phone or browser.