.mkv Matroska Video
MKV Converter
MKV is a flexible open container that can hold unlimited video, audio and subtitle tracks. It is popular for movies and anime but isn't supported by iPhone or most TVs out of the box.
- No upload — 100% private
- Fast, lossless when possible
- Free & unlimited
- Works on iPhone & Android
Working…
Keep this tab open — the conversion runs on your device, nothing is uploaded.
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✓ Done — your files are saved to Downloads
Add more files above to keep converting.
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MKV at a glance
| Full name | Matroska Video |
|---|---|
| Type | Video |
| Compression | Lossy (compressed) |
| Developed by | Matroska.org |
| Introduced | 2002 |
| File extension | .mkv |
| Plays on iPhone | ✕ No |
| Plays on Android | ◐ Partly / with an app |
| Plays on Windows | ✓ Yes |
| Plays on Mac | ◐ Partly / with an app |
MKV is best for movies with multiple audio tracks and subtitles.
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Frequently asked questions
What is a .mkv file?
MKV is a flexible open container that can hold unlimited video, audio and subtitle tracks. It is popular for movies and anime but isn't supported by iPhone or most TVs out of the box.
How do I open a MKV file?
VLC Media Player opens most .mkv files on Windows, Mac, Android and iPhone. If your phone's gallery or a website rejects it, convert it to MP4 above. MP4 is the format every device and app accepts.
Can I convert MKV for free?
Yes. The converter on this page is free and unlimited, and it works without uploading anything.