avi to mkv
AVI to MKV Converter - UniConverter
  • Convert AVI to MKV video or other 150+ video or audio formats.
  • Edit your AVI files with built-in video editor.
  • Convert online videos from 1,000 popular sites to AVI with ease.
  • Transfer AVI files to iPhone, iPad, Android and other devices easily.
  • Burn your AVI videos to DVD if necessary.
  • Powerful toolbox includes: Fix Metadata, GIF Maker, Screen Recorder, VR Converter, etc.

AVI to MKV: How to Convert AVI to MKV on Mac and Windows

by Brian Fisher

Does it still bother you that you are not able to convert AVI to MKV successfully? To convert your AVI movies to MKV (Matroska Video) for sharing with other people more easily or uploading to some web which only accept MKV files, you need a professional Video Converter to assist you.

In this article, you will learn:

Part 1. How to Convert AVI to MKV with Original Quality [Batch Process Supported]

Here, the professional UniConverter is strongly recommended to convert AVI to MKV. It is an easy-designed, but powerful program in converting AVI files to MKV format on Windows 10/8/7/XP/Vista and Mac (macOS 10.15 Catalina, 10.14 Mojave, High Sierra, Sierra, El Capitan, Yosemite, Mavericks, Mountain Lion and Lion). With its super high conversion speed, the MKV to AVI conversion could be finished just in several seconds. And the output files are in original quality.

Get the Best AVI to MKV Video Converter:

  • Easily convert AVI to MKV on Mac or Windows with ease.
  • Support to convert 150+ video or audio formats, including AVI, MKV, MP4, MP4, MOV, VOB, etc.
  • You can use it to extract audio files from your AVI or MKV videos to MP3, WAV, M4A, WMA, AC3, AAC, AIFF, and so on.
  • Trim, crop, rotate your AVI videos, or add subtitle, watermarks and effects to your videos before converting them to MKV.
  • Adjust the parameter settings of your AVI or MKV videos whenever you need.
  • Download online videos from YouTube or other sites, and then convert them to MKV format with ease.
  • Burn your AVI or MKV videos to a blank DVD, or convert your home DVD to any format as wanted.

Step-by-step Guide to Convert AVI to MKV on Mac or Windows PC

Step 1. Add AVI files into the iSkysoft AVI to MKV Converter

Drag & drop AVI files to iSkysoft Video Converter Ultimate. Or you can go to the main menu, choose Add Files to locate the AVI files you want to add. This converter supports batch conversion, so you can add several AVI files at one time.

converting avi to mkv

Edit video (Optional)

You can now use the inbuilt video editor to arrange the videos and make any changes that you would like.

edit avi video

Step 2. Select MKV as the output format

Now you need to go to the format list, choose "MKV" as the output video format. And also choose a resolution as needed. You can follow the instruction in the screenshot below.

convert avi to mkv

Step 3. Start the AVI to MKV conversion

The moment you click the Convert All button, everything could be done automatically for you right away. Bingo! That's it! Within several seconds, you can get the MKV videos in the Converted tab!

convert avi to mkv windows

Part 2. How to Convert AVI to MKV Online

There are many online AVI to MKV converters available but this case, we will use the most effective ones with the best reviews. Different converters have different conversion speeds depending on the upload capacities. Therefore, we recommend you use these web app conversion softwares to convert your AVI to MKV online without much hustle.

1. Online Uniconverter

Link: https://www.media.io/convert/avi-to-mkv.html

Online Uniconverter is a Wondershare product created with the utmost professionalism. The company’s long-term experience in the field of software and applications creation gives it the trust it has gained so far. It supports popular file formats and you are guaranteed of quality output. To successfully convert your AVI file to MKV format on Uniconverter, you have to follow three simple steps. First, you have to import the AVI video file to convert screen by clicking + sign. Secondly, choose the MKV output file format to convert the AVI file. Thirdly, select the convert option to begin the conversion. Finally, click download to save your converted file.


  • It supports files that are less 100MBs.
  • It needs Internet connection.
  • Has watermart on the output video.

uniconvert to convert avi to mkv online

2. Online Converter

Link: https://www.onlineconverter.com/avi

Another way to convert AVI to MKV online is by using the Online Converter AVI to MKV converter. This web-based AVI to MKV converter also supports conversion of popular video formats just like the Wondershare Uniconverter. The process of converting videos on Online Converter is also simple and it involves two steps. You have to begin by uploading the AVI file to the platform by clicking on Convert dropdown to select AVI to MKV and browse the file from your computer. After that, click on Convert and your file will be converted to MKV.


  • It supports files that are less than 200MBs
  • Slow conversion process.
  • Has ad.

Online Converter

Part 3. How to Convert AVI to MKV Free with VLC

Alternatively, you can use VLC media player on your computer to convert AVI to MKV free. VLC video player far from being an awesome video player, it supports video conversion too to various formats. It is great to convert various formats though has few issues. Here is how to Convert AVI to MKV using VLC.

Step 1. Open VLC and click Media then Convert/Save in the VLC screen. On Open Media screen, click Add to upload file and click on Open to upload.

open vlc to convert avi to mkv

Step 2. Click Convert/Save key. To begin the conversion, check Convert option, display output, Dump Raw Input and select expected file type after conversion at Profile option.

Step3. Choose the destination file name and/or destination folder for where you will save the file. Then select save and click Start to begin the conversion. Once the conversion is done it will show as completed on the progress indicator.

open vlc to convert avi to mkv

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Brian Fisher

staff Editor