What happens when you convert MKV to MP3
| Result | Only the soundtrack, encoded as MP3 at 192 kbps by default |
|---|---|
| File size | About 1.4 MB per minute of audio |
| Speed | Fast: the video track is skipped, so only audio is processed |
| Opens in | every device, car stereo and audio app |
Sizes are typical values; your files will vary with content and settings.
MKV Matroska Video
MKV is an open container that can hold almost any codec plus multiple audio tracks and subtitles. It is popular for archived films and series.
MKV converterMP3 MPEG-1 Audio Layer III
MP3 is the most compatible audio format in existence. Every phone, car stereo, browser and editor plays it, and 128 to 320 kbps gives small files that sound good for music and speech.
MP3 converterHow to use the MKV to MP3 Converter
- 1
Choose a MKV file or drop it onto the page.
- 2
Review the audio options. The defaults suit most files.
- 3
Click Convert and download your MP3 when processing finishes.
Why convert MKV to MP3?
MKV is common for films, TV episodes and OBS recordings, because one file can hold several audio and subtitle tracks. iPhones, browsers and most social networks will not play MKV files. Choose MP3 when the audio must play on any device, car stereo or upload form.
Audio extraction options
Only the audio track of the MKV is processed, so this is much faster than a video conversion. Choose the bitrate or quality, optionally trim to a start and end time, and download the MP3.
Frequently asked questions
Will the MP3 lose quality?
Both formats are lossy, so converting re-encodes the data once more. Using a high quality setting keeps the generational loss very small. Avoid converting the same file back and forth repeatedly.
How big will the MP3 file be?
About 1.4 MB per minute of audio at the default 192 kbps, so a 10-minute MKV gives roughly 14.4 MB. The size of the video track does not matter, because only the sound is kept. Choose 128 kbps for speech to make it about a third smaller.
Questions about privacy, file-size limits or conversion speed are answered in the general FAQ.