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MKVToolNix 103.0 for Mac

MKVToolNix 103.0 for Mac

Mac Utilities
Updated Aug 4, 2026
Mac Utilities • Updated Aug 4, 2026

MKVToolNix is a set of tools for working with Matroska files, the MKV container used for a huge share of video stored today. It lets you combine video, audio and subtitle tracks into one file, pull tracks back out, split files into parts and inspect what sits inside a container, all without encoding the video again. The project by Moritz Bunkus is free and open source, and it has been in steady development for many years.

Key Features

  • mkvmerge combines video, audio, subtitles and chapters into one MKV file
  • MKVToolNix GUI gives the tools a clear graphical front end
  • mkvextract pulls chosen tracks, chapters and tags out of a file
  • mkvinfo shows the structure and details of a Matroska file
  • mkvpropedit changes headers and track properties without a full remux
  • No re encoding during muxing, so quality stays exactly as the source

How to Download

The project site lists packages for each platform, including the macOS disk image. Download the Mac build, open the image and drag the app into your Applications folder. Download from the official site The same site posts the news page for each release, which is the best place to confirm the newest version and read what changed.

FAQ

Is MKVToolNix free? Yes. The tools are free and open source under the GPL, for personal and professional use alike.

Does MKVToolNix convert video formats? It mainly muxes and edits containers. It can place tracks into MKV or WebM files, but it is not a video encoder, so picture and sound stay untouched.

Can I add subtitles to a video? Yes. Add the video and the subtitle file in the GUI, set the language and start multiplexing to get one MKV with the subtitles inside.

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