MKVtoolnix 6.6

MKVToolNix is a set of tools to create, alter and inspect Matroska files
4.1  (94 votes)
12.0.0 (See all)

Nowadays, the MKV (Matroska) video format got very popular as it is an open standard and provides undeniable advantages like the possibility to store multiple video, audio, or subtitle tracks in one single file. Furthermore, the Matroska videos are known to usually come with better graphic quality than other formats. As a result, they are larger files, but nowadays, when the disk space is a less important matter, this doesn’t count as a disadvantage.

MKVtoolnix is an open source suite of small utilities that allow you to create, modify, analyze and manipulate MKV video files in various ways. It actually contains five tools (mkvmerge, mkvinfo, mkvextract, mkvpropedit and mmg) and only one of them has an actual graphical user interface: the mkvmerge utility. The others are command prompt utilities. Using these tools, you will be able not only to create Matroska files but also split, merge, modify, mux, demux, or inspect them.

Though it indeed sports a rather intuitive interface for the muxing process (the mkvmerge GUI), using the tools MKVtoolnix is not exactly a job for beginners. Some experience with video manipulation tasks is still recommended. Anyway, the muxing process was simple to perform. The mkvinfo utility is also very easy to use. Though it must be started from the command prompt, it also features a basic interface which displays a lot of through information about a selected Matroska file.

To sum it all up, if you ever need to thoroughly inspect and manipulate Matroska files, the open source MKVtoolnix is simply perfect for the job.

Margie Smeer
Editor rating:

Review summary


  • Open source.
  • Offers a really thorough inspection of the MKV files.
  • The muxing process is fast and can be performed rather easily


  • Only mkvmerge and mkvinfo tools have GUIs.
  • Beginners might have trouble understanding how to properly use some of these tools
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