randorando calls out to random.org's API, which generates a "truly" random number using atmospheric noise to avoid the usual pitfalls of computer-generated randomness. You can read about their methodologies on their site.
randorando is a very lightweight Flask app, and only calls a single JavaScript function (to focus input on the form when you land on the index page). I hate modern Web cruft, and thankfully I can get away with not incorporating very much of it into this site. It's such a simple little app to begin with.
I am Jarrod Whaley. I do things sometimes.