mii2studio is a command-line tool written in Python that can take any Mii from a Wii, 3DS, Wii U, Miitomo, or Switch and output it into a file that Mii Studio can load. Mii Studio is an online Mii editor that was made as a successor to Miitomo. Furthermore, the tool also outputs a link to the Mii rendered in PNG form, thanks to an API endpoint that Nintendo made (it's one of the coolest things ever). The Miis are encoded (probably due to obfuscation) and additional parameters for the API can be played with here (facial expressions, showing a full body, renders of multiple 360° angles of a Mii's body, etc). We use the Mii renderer for our Check Mii Out Channel revival's companion site.