About MKV to MP3
Extract the audio of a concert recording, lecture, or stream saved as MKV into a portable MP3.
Only the first audio track is converted. MP3 holds at most two channels, so 5.1 surround audio is downmixed to stereo.
The FFmpeg engine (about 31 MB) downloads the first time you convert and is then cached by your browser. Files up to about 100 MB are supported because everything runs in browser memory.
MKV vs MP3
| MKV | MP3 | |
|---|---|---|
| What it is | Matroska container | Lossy audio |
| Typical codecs | Often H.264 or HEVC video with AAC, AC-3, or Opus audio | MPEG-1 Layer III |
| Common use | Downloads, recordings (OBS), subtitles and multiple tracks | Universal music and podcast format |
How to do it
- 1
Drop a MKV file into the converter above (already set to MP3).
- 2
Pick a bitrate if you want something other than 192 kbps.
- 3
Tap Convert, keep the tab open until it finishes, then download the MP3.