I made a very basic html version of the 100d6 mechanic by Speak the Sky that handles everything for you. When I say basic I mean reaaaaly basic, I'll work on making in prettier when I can be bothered to do CSS. I hope you are okay with this Speak the Sky. Otherwise let me know and I'll take it down.
https://maxkaemmerer.github.io/wretched-and-alone-d100-dice-roller/
You can also download this file and include it in your project if you like:
https://github.com/maxkaemmerer/wretched-and-alone-d100-dice-roller/blob/master/index.html