How do I convert Matroska (MKV) to MP3?

Upload your Matroska (MKV) file using the box above, confirm MP3 as the output format, then select Convert. The converted file is ready to download as soon as processing finishes — usually in a few seconds.

Is converting MKV to MP3 free?

Yes, and there is nothing to sign up for. Every conversion is free, there is no paid tier, and the limits are the same for everyone.

Will the quality change when converting to MP3?

MP3 uses lossy compression, so some data is discarded to keep the file small. The default quality setting is tuned to be visually or audibly transparent for most material, and you can raise it in the conversion settings.

What happens to my file afterwards?

The uploaded file is deleted as soon as the conversion completes, and the converted file is removed automatically once its retention window ends. Download links are signed and expire within minutes.

mkvmp3

Convert Matroska (MKV) to MP3

Free online converter for Matroska (MKV) files. The most widely compatible lossy audio format. Nothing to install, no watermark, and every file is deleted automatically.

Drag and drop your files

Upload a Matroska (MKV) file to convert it to MP3. Up to 200 files at once, 10 GB each.

Free · up to 200 files · 10 GB each · files deleted automatically after 168 hours.

About MKV and MP3

Matroska (MKV)

Flexible container for high-quality video.

video/x-matroska

MP3

The most widely compatible lossy audio format.

audio/mpeg

Other Matroska (MKV) conversions

mkv to mp4
mkv to webm
mkv to mov
mkv to avi
mkv to gif
mkv to wav
mkv to flac
mkv to ogg

Other ways to get MP3

wav to mp3
flac to mp3
ogg to mp3
opus to mp3
aac to mp3
m4a to mp3
mp4 to mp3
webm to mp3