How to convert MKV to MP3
To convert MKV to MP3, upload your MKV file, choose MP3 as the output format and press Convert. The finished MP3 file is ready to save to your phone or computer in seconds, free, with no watermark and no sign-up. Your file is deleted from our server about 30 minutes after the conversion.
This free online converter turns MKV video files into MP3 in your browser, with no software to install and no watermark. The conversion runs on our server using ffmpeg, and the result is ready to save to your phone or computer in seconds. Your MKV file is deleted automatically about 30 minutes after the conversion.
Reasons to switch from MKV to MP3
- Plays on virtually every device
- Small files at good quality
- Supported by every editor and platform
- Opens in: every phone, computer, car stereo, smart speaker and web browser
What to expect from this conversion
- Only the first audio track is extracted. The picture is dropped, so the file is a small fraction of the video's size.
- MP3 is lossy, so choose High for the best sound or Small for the smallest file.
- Videos with no sound track cannot be converted to audio.
MKV vs MP3
| Property | MKV | MP3 |
|---|---|---|
| Full name | Matroska Video | MPEG-1 Audio Layer III |
| Released | 2002, Matroska.org (open standard) | 1993, Fraunhofer and MPEG |
| Family | Video | Audio |
| Opens in | VLC, Plex, Kodi, most Android players and modern Windows; limited on iOS and older TVs | every phone, computer, car stereo, smart speaker and web browser |
| Best for | movie and TV archives with multiple languages; keeping subtitles inside the file | music libraries and downloads; podcasts |
Steps to convert MKV to MP3
- Drop your MKV file onto the converter, or click to choose it.
- Check that MP3 is selected as the target format and adjust the options if you want.
- Press Convert, then save the new MP3 file to your device when it finishes.
Tips for the best result
- Choose MP3 for the widest compatibility.
- Pick FLAC or WAV if you want to edit the sound afterwards.
Frequently asked questions
How do I convert MKV to MP3?
Drop your MKV file on the converter, confirm that MP3 is the target format and press Convert. When it finishes, press Save to device or download the MP3 file. No account or software is needed.
Is the MKV to MP3 converter free?
Yes. It is free, with no watermark, no sign-up and no limit on how many files you convert. The site is supported by ads.
What should I know before converting MKV to MP3?
Only the first audio track is extracted. The picture is dropped, so the file is a small fraction of the video's size. MP3 is lossy, so choose High for the best sound or Small for the smallest file.
Can I extract the sound from a MKV video as MP3?
Yes. The first audio track is extracted and saved as MP3. The video picture is not included.
Which programs open MP3 files?
MP3 files open in every phone, computer, car stereo, smart speaker and web browser.
How large a file can I convert?
Up to 500 MB per file. Files are deleted from the server about 30 minutes after conversion, and no one looks at them.