MetaFox is a free, drag-and-drop application to convert your videos to the MKV format.
Metafox works as described by providing a small interface to drag your videos. Once you drag it to the Window, it converts it to MKV, and very quickly, we might add. You can find the converted video in the same folder you ran MetaFox in. Currently, it supports HEVC, AVI, MOV, MP4, MPG, FLV, RMVB, and more.
There is a settings button that opens the Window wider with some options. Unfortunately, they aren't all well explained; for example, we couldn't find anything on a few of the settings, including "Alt Method 1 and 2." Other options include Dsmux only, Compress headers, Mux All Input including Mux Groups and Append files, and Split DVD videos.
If you're looking to convert some of your videos to MKV? Look no further. MetaFox is free, small, and fast.
Metafox is free. However, the author does accept donations on PayPal.