MKV – Matroska Video
MKV is a flexible open container that can hold many video, audio and subtitle tracks. It is popular for downloaded films but is not supported by all devices and browsers.
More MKV conversionsDrop your MKV files here
or click to choose MKV files · up to 95MB each
How to convert MKV to MP3
- Choose your files. Click Select File or drag your MKV files into the upload box. You can add many at once.
- Pick the settings. MP3 is already selected as the output format. The conversion starts as soon as a file is added.
- Download. Each file appears in the list when it is ready. Download them one by one, or all together with Download all.
Why convert MKV to MP3?
MKV files often hold films, concerts or lectures. Extracting the sound as MP3 lets you listen on any phone, car stereo or music player without the video.
When to keep the MKV
Keep the MKV if you want to watch the video: the MP3 holds only the sound of one audio track.
Tips for the best result
- The audio is encoded as high-quality variable bitrate MP3, around 190 kbps.
- If the MKV has several audio tracks, such as different languages, one is picked automatically, usually the one with the most channels.
- The MP3 is much smaller than the video.
Common problems and fixes
- The wrong language came out.
- Only one audio track is converted. Remove the tracks you do not need with an MKV tool such as MKVToolNix, then convert again.
- It says there is no audio track.
- The file has no sound, or the sound could not be read.
MP3 – MPEG Audio Layer III
MP3 is the most widely supported lossy audio format. It makes music files small enough to share and plays on virtually every device.
More MP3 conversionsConverting MKV to MP3
- Extracts the audio track.
Frequently asked questions
Is the MP3 good quality?
Yes. The variable bitrate setting used here is regarded as transparent for most listeners.
Can I get lossless audio instead?
Choose FLAC or WAV as the output format for lossless sound.
How do I convert MKV to MP3?
Click Select File or drop your MKV file onto the upload box. The converted MP3 appears in the list below with a download button. You can add many files at once and download them together as a ZIP.
Is it really free?
Yes. There is no sign-up and no watermark. To keep the service available for everyone there is a 95MB limit per file and a cap on how many files one connection can process in a short period.
Are my files stored?
Your upload is used only to make the converted file. Images are processed in memory; other files are written to a private temporary folder that is deleted as soon as the conversion finishes. Nothing is kept after the result has been sent back.
Will quality drop?
For images, a little, by design: the image is re-encoded at the Quality you choose (default 75%). Audio and video are re-encoded with high-quality settings; documents keep their text and layout as far as the target format allows. Converting never restores detail that is already missing from the original.
How this works: your file is uploaded over HTTPS and converted on this server with open-source engines (libvips for images, FFmpeg for audio and video, LibreOffice and Pandoc for documents, Calibre for ebooks, Ghostscript and Inkscape for PDF and vector files). Images are processed in memory; other files use a private temporary folder that is deleted as soon as the conversion finishes.