Made a quick random number generator that also generates secure passwords, random strings, random picker (e.g. pick a random item from a list), random colors, a random name generator, random credit card numbers, random ip addresses and random UUIDs, among many others.
The most difficult part of this website is trying to compete with the plethora of random number/random string/random this or that, etc. websites out there - most of which have been around for many, many years.