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MKVToolNix is a set of tools to create, alter, split, join and inspect Matroska files(mkv). With these tools one can get information about (mkvinfo) Matroska files, extract tracks/data from (mkvextract) Matroska files and create (mkvmerge) Matroska files from other media files. Matroska is a multimedia file format aiming to become THE new container format for the future. Use MKVCleaver or gMKVExtractGUI to extract/demultiplex mkv video and audio files.

8.8/10
157 votes
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MKVToolNix screenshot 2
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MKVToolNix screenshot 3
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Latest version

48.0.0 (June 27, 2020)



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Download MKVToolNix 48.0.0 Windows 64-bit  18MB  Win64

Download MKVToolNix 48.0.0 Windows  17MB  Win

Download MKVToolNix 48.0.0 Mac  38MB  Mac

Download MKVToolNix 48.0.0 Linux 64-bit  41MB  Linux64




Download Portable and other versions

Download MKVToolNix 48.0.0 Portable Windows 64-bit  16MB  Win64  Portable

Download MKVToolNix 48.0.0 Portable Windows  15MB  Win  Portable




Download old versions


Download MKVToolNix old versions



Software License

Free software / FOSS (Free download and also Free and Open Source Software)



Supported operating systems

WinWindows MacMac OS LinuxLinux



More information and other downloads

Use MKVCleaver or gMKVExtractGUI to extract/demultiplex mkv video and audio files.

Download jMkvpropedit here, a GUI for mkvpropedit. Set default audio, video tracks.

If you prefer the old mmg/mkvmergegui then download MKVtoolnix version 8.3.0 or older.



Version history / Release notes / Changelog


# Version 48.0.0 "Sick Of Losing Soulmates" 2020-06-27

## New features and enhancements

* mkvmerge: AC-3: file identification will report AC-3 tracks encoded in Dolby Surround EX as codec "AC-3 Dolby Surround EX". Implements #2740.
* MKVToolNix GUI: multiplexer: on new installations the GUI will now recognize all known ISO 639-2 language codes in file names by default instead of only the top 100 of languages by native speakers.
* MKVToolNix GUI: multiplexer: on new installations the list of "often used languages" will by default only contain certain agnostic ones ("multiple languages", "no linguistic content", "reserved for local use", "uncoded languages"), "English" and the default user interface language. The "list of spoken languages by native speaks" isn't used anymore. Also implements #2716.
* MKVToolNix GUI: header editor: added an option to remove all attachments to the tree context menu. Implements #2835.
* MKVToolNix GUI: while the GUI is running it will remember the last page that was selected when the preferences dialog is closed. Upon re-opening the preferences that page will be selected by default. Implements #2852.

## Bug fixes

* mkvmerge: fixed a segmentation fault when exiting prematurely due to write errors such as the destination having run out of space. Fixes #2843.
* mkvmerge: DTS: fixed wrong channel count for DTS tracks with XCh extensions. Fixes #2715.
* mkvmerge: MPEG TS reader: fixed detecting h.264/AVC and h.265/HEVC tracks that consist of only a single frame. Part of the fix of #2849.
* mkvmerge: MPEG TS reader: fixed handling of unbounded PES sizes for tracks that consist of only a single PES packet. Part of the fix of #2849.
* mkvmerge: MPEG TS reader: PGS subtitle tracks are now exempt from the "detect bogus subtitle timestamps" heuristic which could lead to some PGS subtitles not being timestamped correctly. Symptoms were that they were shown at the wrong time or that they were shown indefinitely. Fixes #2736 and partially fixes #2824.
* mkvmerge: MPEG TS reader: when reading MPLS playlists the start timestamps of a play items were handled wrong: all the timestamps of packets read were compared to that start timestamp, dropping those packets whose timestamps were smaller than the play item's start timestamp. The correct behavior is to accept all packets as soon as the first one with a timestamp equal to or larger than the play item's start timestamp is encountered. This could result in PGS subtitle entries located right at the start of the play item being garbled/lost as they consist of multiple PES packets for which some timestamps are often slightly smaller. Part of the fix of #2824.
* mkvmerge: MPEG TS reader: when reading MPLS playlists mkvmerge will no longer read the whole M2TS files they reference, processing only the packets lying inside the timestamp range given by the playlists's play item's start & end timestamps. Instead mkvmerge will use the index information present in corresponding clip information (CLPI) files in order to seek to the nearest file position of the play item's start timestamp. Additionally mkvmerge will simply stop processing a file once the end timestamp is seen. This change greatly speeds up processing files from which only small portions must be read. Part of the fix of #2824.
* mkvmerge: WavPack: fixed support for files created by v5 of the program. Checksums, DSD audio data and non-standard sampling rates are handled correctly. Patch by David Bryant.
* MKVToolNix GUI: multiplexer: fixed the cursor being positioned wrong after entering or pasting characters that aren't allowed in file names into the "destination file" control. Fixes #2855.

## Build system changes

* libEBML v1.4.0 and libMatroska v1.6.0 are now required.

## Other changes

* The source code repository's main development branch was renamed to `main`.

View full changelog




Sections/Browse similar tools






Alternative to MKVToolNix


MKVcleaver



MKVExtractGUI and MKVE Wizard



OGMcleaver







Guides and How to's


How to convert MKV to DivX / Demultiplex MKV to video and audio files

- Read

How to convert MKV to MPG (VCD,SVCD or DVD)

- Read

How to cut/split/extract parts from a mkv including all audio and subtitle tracks

- Read

How to rip a Blu-ray disc and remux it to MKV

- Read

Using Handbrake to Burn in Subtitles from MKV to MP4

- Read

MKVToolNix video tutorials



View all guides with guide description here




Acronyms / Also Known As

mkvmerge, mkvmerge gui,mmg, mkvmergegui, mkvextract, mkvpropedit, mkvinfo, mkvtoolnix gui, mkvtoolnixgui



Download MKVToolNix Portable download from the Download links under Download and Download other versions!



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158 reviews, Showing 1 to 5 reviews


No comments. Rating it only.

Review by Jack Spratt on May 7, 2020 Version: 46.0.0 OS: Windows 10 64-bit Ease of use: 10/10 Functionality: 10/10 Value for money: 10/10 Overall: 10/10




No comments. Rating it only.

Review by x64 on Mar 8, 2020 Version: 42 OS: Windows 10 64-bit Ease of use: 10/10 Functionality: 9/10 Value for money: 10/10 Overall: 9/10




just downloaded and this helped me on my task to change default audio track on a mkv file very,very easily. So i felt to urge to drop this positive comment. great tool.

Review by Riquich on Mar 8, 2020 Version: 43.0.0 OS: Windows 10 64-bit Ease of use: 10/10 Functionality: 10/10 Value for money: 10/10 Overall: 10/10




Upgraded from 64-bit v29.0.0 but cannot import xml chapters. Creating chapters within the GUI freezes process/app. Went back to v29.0.0 until these issues are resolved.

Review by depamode on Jan 23, 2020 Version: 42.0.0 OS: Windows 10 64-bit Ease of use: 10/10 Functionality: 3/10 Value for money: 10/10 Overall: 9/10




Great software, but in version 42.0.0 one of the functionalities i use practically every day stopped to work - it's not possible to add .xml chapter file anymore (even if it was saved a second ago in the built-in chapter editor) as an input file - please fix this!

Review by MarekZegarek on Jan 6, 2020 Version: 42.0.0 OS: Windows 10 64-bit Ease of use: 10/10 Functionality: 9/10 Value for money: 10/10 Overall: 9/10


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