How to convert MKV to MP4, AVI for Free

If you can’t open MKV (.mkv) or Matroska extension files on your PC, convert MKV to MP4 or to AVI free. Free MKV to MP4/AVI Converter can change your Matroska file to MP4 (.mp4) or AVI (.avi) in an easy way and without losing quality. Both MP4 and AVI formats take less space on your hard drive and are universal for reproducing on the majority of players. Enjoy your movies on any TVs and mobile devices.
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Follow the steps below to convert MKV to MP4 or to AVI:

1. Download free MKV to MP4, AVI converter
2. Add Matroska files you want to encode
3. Choose “to AVI” or “to MP4” output option
4. Set final file parameters
5. Run the converting process
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Download & run
MKV to MP4, AVI Converter app

Download free Freemake Video Convertersoftware from the official developers' website. Find the Freemake file on your PC and double-click to run it. The freeware can be launched on Windows PCs and laptops only. The supported OS versions are Vista, 7, 8, and 10. Please note that there is no official Mac version. Follow the installation procedure up to the end. You might simply click the Next button all the time.

Add media you want to transcode

Start free Freemake MKV to MP4/AVI utility and drag-n-drop your data into it. Alternatively, you can click the “+Video” button and select the necessary clips from your PC. Add multiple files at once and convert MKV to AVI in batch. Please note that large files should be converted one by one. Only MKVs with h264 codec are supported.

Choose “to AVI” or “to MP4”

Make up your mind what output format is the best for the future films. It depends on a device you will use to play the files (Apple, Samsung, Sony or others). We recommend choosing MP4 container for portable gadgets and AVI for desktop and TVs. Select the necessary output option of the formats panel.

Set final file parameters

If you don’t want to deal with settings, leave everything as is. In case you want to control everything, click on the drop-down menu to see available ready options. Pay attention to the right column to understand what is the difference between them. You’ll also find a custom preset at the bottom of the menu. If you click it, you’ll be able to select personalized settings such as frame rate, bitrate, codec (MPEG4 or DivX), frame size, audio parameters, and so on.

Whether you plan to transform MKV to AVI or MP4 for the same device, you can save your preset for future use.

Run the converting process

When everything is ready, set the destination folder for your new video and click the blue “Convert” button to launch the encoding process. It may take some time depending on how powerful and thus how fast your computer is.

As soon as the process finishes, go and check your new file. For example, you may use KMP or VLC player to watch it. Or transfer the movies to USB drive to play MKVs on TV.

This guide is valid for any Matroska movies. However, if you have an HD file, you might also be interested in how to convert HD videos for free.