Video

The MKV format

An open, flexible container that accepts almost any codec, several audio tracks and subtitles. It’s loved for films and series, but TVs, iPhones and some editors can’t read it.

Drop your files hereor (MKV and over 40 other formats). You can also paste an image.No upload: everything happens on your device

Fact sheet

MKV

Matroska Video

Best for: Archiving films with several languages and subtitles.
Limits: Poorly supported by Apple devices, social networks and editing software.
Type: open container
Typical codecs: any
Compatibility: good on PCs, limited on phones
Extensions: .mkv
MIME type: video/x-matroska
Since: 2002

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Tools for MKV files

Questions about the MKV format

How do I open a MKV file?

Usually a double click is enough: operating systems and the most common programs recognise it. If the program or website you use won’t accept it, you can convert it here to a more common format, for example MP4.

What extension do MKV files have?

.mkv. The MIME type is video/x-matroska.

Does converting a MKV lose quality?

It depends on the target format: to lossless formats (PNG, FLAC, WAV) nothing is lost; to compressed formats (JPG, MP3, MP4) you can choose the quality to balance size and result.