Create, modify and inspect Matroska (MKV) files for Windows PC

MKVToolNix (32-bit)

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MKVToolNix 12.0.0 (32-bit)

  -  15.69 MB  -  Open Source
Free Download

Security Status

  • Latest Version

    MKVToolNix 88.0.0 (32-bit)

  • Operating System

    Windows Vista / Windows 7 / Windows 8 / Windows 10

  • User Rating

    Click to vote

  • Author / Product

    Moritz Bunkus / External Link

  • Filename

    mkvtoolnix-32bit-12.0.0-setup.exe

  • MD5 Checksum

    67720aeec852a5bc6e28ab12dce57100

Sometimes latest versions of the software can cause issues when installed on older devices or devices running an older version of the operating system.

Software makers usually fix these issues but it can take them some time. What you can do in the meantime is to download and install an older version of MKVToolNix 12.0.0 (32-bit).


For those interested in downloading the most recent release of MKVToolNix (32-bit) or reading our review, simply click here.


All old versions distributed on our website are completely virus-free and available for download at no cost.


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Download MKVToolNix 12.0.0 (32-bit)

  • MKVToolNix 12.0.0 (32-bit) Screenshots

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    MKVToolNix 12.0.0 (32-bit) Screenshot 1
  • MKVToolNix 12.0.0 (32-bit) Screenshot 2
  • MKVToolNix 12.0.0 (32-bit) Screenshot 3

What's new in this version:

New features and enhancements:
- MKVToolNix GUI: the key combination Ctrl+Shift+Space will now toggle the selection of the current item in all tree views where multiple selections are allowed. Implements #1983.
- MKVToolNix GUI: chapter editor: added the extension `*.cue` (for cue sheet files) to the "open chapter file" dialog.
- mkvmerge: cue sheet parser: if the cue sheet contains a non-empty `TITLE` entry and if no other segment title has been set yet, then the segment title will be set to the cue sheet's `TITLE` value. Implements #1977.
- mkvmerge, MKVToolNix GUI (multiplexer): added an option `--no-date` that prevents the "date" field from being written to the segment information headers. Implements one half of #1964. mkvpropedit,
- MKVToolNix GUI: header editor: added support for editing the "date" segment information field. Implements the other half of #1964.

Bug fixes:
- MKVToolNix GUI: preferences ? job actions, type "play audio file": the GUI will no longer clear the audio file name input if the user aborts the audio file selection dialog.
- MKVToolNix GUI: preferences ? job actions, type "play audio file", on Windows: the default "play audio" action was pointing to the wrong directory. Existing configurations with such a wrong path will be fixed automatically upon starting the GUI. Fixes #1956.
- mkvmerge: HEVC/h.265 parser: fixed the superfluous copying of the `bitstream_restriction_flag` and its dependent flags in the VUI parameters of the sequence parameter sets if the timing information is present, too. This fixes #1924 properly, and it also fixes #1958.
- mkvmerge: MPEG TS reader, AAC parser: the MPEG TS reader will now force the AAC parser to use the multiplex mode that the MPEG TS reader has detected (e.g. LOAS/LATM). This prevents the AAC packetizer from mis-detecting it in its own attempt to identify the mode. Fixes #1957.
- mkvmerge: MPEG TS reader: valid MPEG transport streams that start with an h.264/h.265 start code (e.g. a file created by cutting at an arbitrary position) were not recognized as a supported file type.
- mkvmerge: MPEG TS reader: fixed a potential read access from invalid memory addresses in the code parsing the program map table (PMT).
- mkvmerge: MPEG TS reader: if packets are encountered that belong to a PID not listed in the program map table (PMT), mkvmerge will attempt to determine their type and codec from the content. This supported content types are AAC (ADTS only) and AC-3. Fixes #1980
- mkvmerge: MP4 reader: fixed finding and parsing the `colr` atom if there are more than one video extension atoms and the `colr` atom is not the first one
- mkvmerge: MP4 reader: the `nclx` colour type of the `colr` atom is now recognized, too (as defined by ISO/IEC 14496-12, "ISO base media format")
- configure: fixed configure aborting if a `moc`, `uic`, `rcc` or `qmake` binary is found, but the binary's version is too old. Fixes #1979

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