Convert MKV to MP3 online in seconds — free, with no sign-up. MP3 is lossy and ideal for music, podcasts and sharing where compatibility matters most. Your files are encrypted and deleted automatically after 24 hours.
MKV
Matroska Video — A flexible container that holds multiple audio, video and subtitle tracks.
MP3
MP3 audio — The most compatible lossy audio format — small files that play on every device.
How to convert MKV to MP3
- 1Upload your MKV file
Click “Choose a file” or drag and drop your MKV file onto the page — no sign-up or email needed.
- 2Convert to MP3
MP3 is already selected as the output. Open Options to fine-tune quality if you like, then click Convert.
- 3Download your MP3 file
Your MP3 file is ready in seconds — click Download to save it. Files are automatically deleted after 24 hours.
MKV vs MP3
| MKV | MP3 | |
|---|---|---|
| Full name | Matroska Video | MP3 audio |
| Type | Video | Audio |
| Compression | Lossy | Lossy |
| Best for | archiving films with multiple tracks; converted to MP4 for compatibility | music, podcasts and sharing where compatibility matters most |
Frequently asked questions
Does converting MKV to MP3 lose quality?
Both MKV and MP3 use compression, so re-encoding discards a little more data. For a single conversion the change is imperceptible to the ear; just avoid repeatedly re-converting the same file.
What's the difference between MKV and MP3?
Matroska Video (MKV) is lossy and best for archiving films with multiple tracks; converted to MP4 for compatibility. MP3 audio (MP3) is lossy and best for music, podcasts and sharing where compatibility matters most. Convert MKV to MP3 when you need a audio for music.
Is the MKV to MP3 converter free?
Yes — converting MKV to MP3 is completely free. There's no watermark, no sign-up and no email required, and you can convert as many files as you like.
Are my MKV files private and secure?
Yes. Your uploads are encrypted in transit, processed privately, and automatically deleted within 24 hours. We never share, sell or look at your files.
Can I convert MKV to MP3 on iPhone, Android, Mac or Windows?
Yes. The converter runs entirely in your browser, so it works on any device — iPhone, iPad, Android, Mac, Windows or Linux — with nothing to download or install.
How long does it take to convert MKV to MP3?
Most files convert in a few seconds. Larger files take a little longer, and your upload speed is usually the limiting factor. There's no queue and no waiting for an email.
What else can I convert MKV files to?
Besides MP3, you can convert MKV to AAC, AVI, FLAC, FLV, GIF, JPG and more — see the full list of MKV conversions below.
Other conversions
Last updated July 2026