How to convert MKV to AVI?

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How to Convert MKV to AVI and Vice Versa

Edited by Pat Bitton

September 11, 2019

The MKV or Matroska format is getting more and more popular among online file sharers. It was designed as a new standard for high quality video compression, and is able to combine HD video with multiple audio tracks and subtitle tracks, which can lead to very large file sizes – over 4 GB. This becomes a problem because they don't fit on flash drives, steal a lot of disk space on your computer, and require a very powerful system for smooth playback. However, we often don’t really need all these data, so it’s important to have software at hand to convert MKV to AVI or another common format.

Below, we’ll discuss several of the best ways to transfer MKV to other formats.

How to Convert MKV to AVI with Movavi

Movavi offers one of the fastest solutions for MKV-to-AVI conversion. Download Movavi Video Converter for Windows or Mac right now and give it a try. Just follow these simple steps below to start converting MKVs to AVI.

Install the Program on Your PC or Mac

Once the installation file has downloaded to your hard drive, open it and follow the on-screen instructions. Installation typically takes around half a minute.

Add MKV Files to the Program for Encoding

Click Add Media, then Add Video and open the files you want to transform. The batch conversion feature enables you to encode multiple files simultaneously, so you don’t have to add and convert them one by one.

Select the Output Format

Navigate to Video > AVI and select the AVI preset that best suits your needs. If you use Windows and your computer supports Intel® or CUDA® graphics technologies, the conversion process may be accelerated. If you are simply converting from MKV to AVI without changing the codec or resolution, the files will be converted even faster using the SuperSpeed technology.

Video Converter supports more than 180 different multimedia formats and codecs, so you’re sure to find the one you need. Typically, MKV files can be compressed into AVI, but you can also change AVI to MKV or another movie format if you wish.

Learn more about support for Intel® and CUDA® graphics acceleration

Learn more about the SuperSpeed technology

Convert MKV to AVI

Once everything is set, check the Save to field below the presets ribbon and make sure the output files will be saved in the right place. Click the Convert button to start. The folder containing the converted files will open automatically once the operation is complete.


Movavi Video Converter

The ideal way to get your media in the format you need!

  • Convert video, audio, DVDs, and image files
  • Enjoy lightning-fast conversion without quality loss
  • Improve quality, adjust sound, trim and join files before converting
  • Save video and audio clips for easy mobile access

How to Use an MKV-to-AVI Converter for Free

You can also convert your files by using a program like VLC Media Player as a free MKV-to-AVI converter. Just download the application and do the following.

Click Media and then Convert / Save in the top portion of the program interface. Select Add to insert one or more audio files and hit Convert / Save. Another window will open, in which you can choose AVI as the output format, set the destination folder, and specify the file name. Once you’re finished, click Start.

How to Convert MKV to AVI Online

If you want to convert your video clips online, go to and upload a file by clicking the Add Your File button. Open the list of formats, choose Video, and select AVI as your desired format. Next, hit Convert. After the conversion is complete, click the Download button to save the video to your hard drive.

Note that the service limits you to converting one file at once, and the maximum size for any one file is 100 MB.

Differences between Desktop and Online Converters

Online Video Converter
  • Long-time wait
  • Up to 100 MB file size
  • Popular formats supported
  • Slow conversion speed
Movavi Video Converter
  • 0-second wait
  • No size limits
  • 180+ formats, presets for 200+ devices
  • Converting a video from MKV to AVI in a blink
  • Online user support

AVI vs. MKV Comparison

AVI (Audio Video Interleave) is one of the most widely used formats for encoding movies, TV shows, home video, and educational materials. Thanks to its simplicity, AVI is supported by all Windows-based devices as well as many Android-based devices, game consoles like Xbox and PSP, and most personal computer operating systems. However, it’s not the best option for Apple fans. That’s because AVI files will only play on Mac computers if they are encoded using QuickTime codecs, which is not usually the case. So, you’ll probably have to convert AVI files to a multimedia format supported by Apple.

MKV (Matroska Video) is a free container format that lets you combine multiple audio, video, and subtitle streams – which is why it has become so popular for movie storage. MKV contains a video track, an audio track, and a subtitle track, as well as a lot of service information that enables users to create menus like DVD movies, manage timing, etc. However, your TV or smartphone may face problems opening MKVs, so many users prefer to convert movies to a format compatible with most devices.

Below, you’ll find an MKV vs. AVI comparison table.

Comparison parameterMKVAVI
File extension.mkv. .mk3d, .mka, .mks.avi
Video encoding formatsH.264, H.265, MPEG-4, MJPEG, Theora, VP9, DV, othersH.263, VC-1, MPEG-1, MPEG-2, MPEG-4, others
Audio encoding formatsAAC, AC3, MP3, ALAC, VorbisAAC, WMA, MP3, FLAC, AMR, others
Device and OS compatibilitySome TVs, media players, and mobile devices. Windows PC (with a special codec installed), no native support in macOSAll Windows-based devices, Mac OS X (with extra software), Linux