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Free MKV to MP4 Converter

Release date:
Czech, English, French, German, Greek, Hungarian, Italian, Japanese, Latvian, Polish, Portuguese (BR), Russian, Serbian, Spanish, Swedish, Turkish
Windows XP, Vista, 7, 8, 10



Free MKV to MP4 Converter is a free program that allows you to convert Matroska video files (MKV) to MP4 format.

MP4 files created by the program can be played on many portable devices (iPhone, iPod, Samsung Galaxy, Microsoft Surface, HTC, PSP) and fixed media players (WD TVXtreamer, Asus O!Play). For encoding video streams, the program can use H.264/AVCH.265/HEVC, or Xvid video encoder. For encoding audio streams program uses AAC (Advanced Audio Coding) or MP3 (Lame) audio encoder.

The program has a number of predefined settings (profiles) specially designed for novice users. More advanced users can customize video and audio encoding parameters used by encoder: audio and video codec, audio and video bitrate, aspect ratio, frames per second, resolution, color conversion to grayscale or sepia, change contrast and brightness, audio sampling frequency, volume and other.

Basic operation of the program is very simple: just drag & drop MKV files into main window and click  button on the toolbar.

The program is available in both 32 bit and 64 bit version. The conversion process of the 64-bit version is faster by a few to 50% (depending on the selected video encoder).


The most important features

  • Converting Matroska video files (MKV) to MP4.
  • Supported video encoders: H.264/MPEG-4 AVC (Advanced Video Coding), H.265/HEVC (High Efficiency Video Coding), Xvid.
  • Supported audio encoders: AAC (Advanced Audio Coding), MP3 (Lame).
  • Compatibility with the HTML5 Video specification using the H.264 and AAC encoders.
  • Support for multithreaded encoding using the H.264 and H.265 video encoder.
  • Displaying a detailed technical information about the source files in the File properties window.
  • Fully configurable file list (table) displays a lot of useful information: video and audio codec, video and audio bitrate, duration, resolution, display aspect ratio, number of audio channels, and many more.
  • The ability to convert any audio stream from a video file with multiple audio tracks.
  • A number of predefined conversion profiles. Possibility to save your own settings to an INI file.
  • A large number of encoding parameters: audio and video bitrate, display aspect ratio, frames per second (fps), number of encoding threads, x264 profile, number of audio channels, audio sampling, volume, changing the resolution, scaling and cropping the image, color conversion to grayscale or sepia, brightness, saturation, horizontal & vertical flip, rotation, deinterlacing, and other.
  • Possibility of 2-pass encoding.
  • The ability to save encoder commands in a BAT file.
  • The program is portable: it does not use system registry and all settings are stored in INI files. Thanks to this program can be run from portable devices such as pendrives, removable drives.
  • The program has a built-in support for multiple languages. Current version supports Czech, English, French, German, Greek, Hungarian, Italian, Japanese, Latvian, Polish, Portuguese (BR), Russian, Serbian, Spanish, Swedish, Turkish.
  • 100% freeware! – for private and commercial use. The program does not require registration, there is no built-in limitations, does not add to the generated files “watermarks”, etc.

How to uninstall?

If you no longer use Free MKV to MP4 Converter application or if you want to free up space on your hard disk, you can uninstall this program from your computer. To do this, follow these steps:
  1. Open Programs and Features by clicking the button, clicking Control Panel, clicking Programs, and then clicking Programs and Features.
  2. On the list of installed programs select Free MKV to MP4 Converter and then click Uninstall. This will launch the uninstall wizard.
  3. Follow the instructions displayed on the screen.

End User License Agreement

This program is completely free. You can use it without any restrictions, also for commercial purposes.

3rd party software

To encode the video files the program uses the FFmpeg encoder (

To retrieve information about video files, the program uses the library MediaInfo.dll (

The program is accompanied by a special version of the FFmpeg encoder, adapted to the needs of the program. Not recommended to use other versions of FFmpeg.


Version 1.2 (17.07.2018)

  • Program name was changed from Pazera Free MKV to MP4 Converter to Free MKV to MP4 Converter.
  • Restored compatibility with Windows XP.
  • New conversion engine (FFmpeg) and multimedia information library (MediaInfo).
  • New modules: Check for updates and Tools info.
  • New video filter: negative.
  • Added option to save the creation, last access and last write time of the source files in the output files.
  • New visual style: Cobalt XEMedia.
  • Additional navigation buttons.
  • The control displaying the list of profiles has been changed. Now additional separators are displayed between the profiles, which increases the readability.
  • The tab and panel with video filters are highlighted in blue.
  • Added ability to edit output directory list.
  • A lot of changes to other interface elements: toolbar, menus, file list, panels…
  • Added the ability to select visible columns from the context menu of the file list and from the main menu.
  • The error causing displaying of negative values of processed data after exceeding the 2GB threshold has been fixed.
  • Automatic scrolling of text in the window with the conversion progress.
  • Fixed a bug that caused some of the conversion parameters reset when switching visual styles.
  • A lot of improvements and bug fixes.

Version 1.1 (Sep 21, 2016)

  • From now program is also available in a 64-bit version.
  • New conversion engine (FFmpeg) and multimedia information library (MediaInfo).
  • Added support for H.265/HEVC video encoder.
  • Improved matching of encoding parameters with automatic settings.
  • Improved detection of data streams in the source files.
  • Added possibility to set level of the H.264 encoder.
  • New file list control with many additional features (sorting, row and column moving…).
  • New columns: icon, full file name, duration, video (summary), video codec, video codec ID, video profile, video bitrate, width, height, resolution, display aspect, frames/sec., bits/pixel, scan type, video stream size, audio (summary), audio codec, audio codec ID, audio profile, audio bitrate, channels, sampling rate, audio stream size, menu, chapters, chapter title, chapter start, chapter end, chapter number.
  • Displaying a more detailed information about the source files in the File properties window.
  • New conversion profiles.
  • Possibility to splitting the output files based on chapters stored in the source files.
  • New actions: Uncheck all files, Check selected files, Uncheck selected files, Clear file list
  • Possibility to hide panel with conversion settings.
  • Changed toolbar.
  • New icons.
  • Better support for visual styles.
  • Added support for additional languages: Hungarian, Latvian, Russian, Swedish.
  • Support for Windows XP was dropped. Windows Vista or later is required.

Version 1.0 (7 Jan 2014)
Initial release.

Previous versions

Free MKV to MP4 Converter 1.2 32-bit
Release date: 2018.07.17
File size: 17.6 MB
SHA-256 checksum: d20e18f79eb197b69b160221f956f05ed8ad4e5b579cc49d0a6fa7604303e800
Free MKV to MP4 Converter 1.2 64-bit
Release date: 2018.07.17
File size: 19.6 MB
SHA-256 checksum: 2ec4bba30487ac8d37422fa32f50f92ed3796c7ad6a5185acd6563780e797c3b
Pazera Free MKV to MP4 Converter 1.1 32-bit
Release date: 2016.09.21
File size: 13.0 MB
SHA-256 checksum: c5639ebbf931e5ec2524c9106c7e607ba07e3f5af3ed0c5c06965b5e74577f7b
Pazera Free MKV to MP4 Converter 1.1 64-bit
Release date: 2016.09.21
File size: 14.5 MB
SHA-256 checksum: 7629ec9e4b89cde8f4b0ff260daea58e20465c14b72adfefc7dbed55fb6006d4
Pazera Free MKV to MP4 Converter 1.0 32-bit
Release date: 2014.01.07
File size: 8.1 MB
SHA-256 checksum: 09d2586b452e3546835ccb98c5fd4b95b78466cf610b104b8bf5d015dccbd6b1