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Updated: March 07, 2025

.MKV File Extension

There is only one filetype that uses .MKV file extension and it is Matroska Video File.

Matroska Video File

File category: Video Files
Developer: Lasse Karkkainen
Open with: VideoLAN VLC Media Player (+10 more)
Platforms: Windows, macOS, Linux, iOS, Android

An MKV file is a video file stored in the Matroska multimedia container format. Unlike some other formats, MKV is a container rather than a codec, meaning it can hold multiple types of audio, video, and subtitle tracks within a single file, even if they use different encoding methods. The format supports various video resolutions including 2K, 4K, and 8K, depending on the original quality and your device capabilities.

The Matroska format was initially released in December 2002. It was developed as an open-source project by Lasse Kärkkäinen, who worked with Matroska founder Steve Lhomme and a team of programmers. Later, in 2010, the format became the basis for the WebM multimedia format.

MKV files are commonly used to store movies, TV shows, short video clips, and other multimedia content. The format has gained particular popularity in the anime fan-subbing community because it can include multiple subtitle tracks in a single file. MKV offers several key features that make it versatile and "future-proof":

  • Fast seeking capabilities
  • Selection between different audio and video streams
  • Support for both hard-coded and soft-coded subtitles
  • Integration of metadata, chapters, and menus
  • Online streaming capability
  • Error recovery features that allow playback of partially corrupted files

MKV is based on Extensible Binary Meta Language (EBML) and follows specific constraints in its design. The format is similar to MOV, ASF, and AVI specifications but offers greater flexibility. An MKV file might contain H.264 video alongside MP3 or AAC audio tracks, plus additional features like cover art, ratings, and chapter points.

How to Open .MKV as Matroska Video File

Most modern media players can open MKV files across desktop and mobile platforms. Some popular options include:

  • VLC media player
  • MX Player

The format is compatible with various operating systems for both computers and mobile devices. Keep in mind that playing high-resolution MKV files may require significant hardware resources.

How to Convert an MKV File

If you need to convert MKV files to other formats, several tools can help:

  • VLC media player
  • HandBrake
  • Wondershare Video Converter Pro

These applications can convert MKV files to formats like MP4, WEBM, TS, and ASF.

Applications That Open MKV Files

Windows Apps for MKV Files:

macOS Apps for MKV Files:

Linux Apps for MKV Files:

iOS Apps for MKV Files:

Android Apps for MKV Files:

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