I'm terrible at naming things I'm sorry. It's live here.
What does this tool do? It's a quick tool to collect northwest and southeast corner coordinates of a rectangle that covers a particular area on the map.
Um ok how is this even useful? Well I initially built it for myself, because I need to collect these coordinates to be used with the S2 Geometry Library. You might find another use of this, who knows!
You just need to setup your API key and restrict your API key if needed.