This is a nifty tool, and to be honest I was unaware that regex visualization was a thing before now. I usually write comments in BNF next to my regex, so that

This is a nifty tool, and to be honest I was unaware that regex visualization was a thing before now. I usually write comments in BNF next to my regex, so that I can make sense of them later. I'm going to keep doing that, but visualization is going to be great for debugging and for figuring out other people's less carefully commented regex.