AVI files have huge file sizes. An ordinary AVI video that lasts a few minutes may probably reach to several GB. And that accounts for why AVI is not suitable for distribution. However, MKV format is different. It has the ability to store a wide range of data but still remains a smaller file size. So if you need to convert AVI to MKV to save storage space or for other reasons, you can stay here for a while and keep reading. We will show you how to attain MKV files from AVI videos using 3 practical tools.