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MKVtoolnix is a set of tools to create, alter, and inspect Matroska files under OS X, Linux and other Unices, and Windows. They do for Matroska what the OGMtools do for the OGM format and then some.

Since May 1st 2003, the Matroska libraries themselves and my Matroska tools are officially released as a first public beta version. Although all of them are still under heavy development, I urge you to download the software, test it and report any errors you encounter to me. I'm always grateful for good bug reports because I miss so many mistakes and you guys more...

What's New

Version 8.4.0:

Note: If you have problems with the new GUI, download version 8.2.0 with the old GUI from Related Links.

  • MKVToolNix GUI: chapter editor bug fix: whenever the additional modification of »expanding start/end timecodes to include the minimum/maximum timecodes of their children« was run on an edition entry then ChapterTimeStart and sometimes ChapterTimeEnd more...


  • OS X 10.8 or later

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Current Version (8.x)


Downloads 293,041
Version Downloads 1,960
License Free
Date 22 Sep 2015
Platform Intel 64 / OS X
Price Free
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