This is a fantastic web util; bookmarked for the future.
I wish I had this when I was making, [Dragon's Oven](https://tronster.itch.io/dragon). It was a lot of nights and weekends of tinkering with ANSI codes in Typescript. I learned a lot that surprised me, such as: most modern OS's still don't support 16m colors out of the box and that the default Linux shell doesn't support beyond 16 colors. Also no really good modern ANSI editors out there. I tried bringing back "TheDraw" in DosBOX for some art, but ended up using a mismatch of more modern utilities, false starting one of my own, and working on an image to ASCii/ANSI converter.
Maybe it's growing up in the BBS days, but something about ANSI is really charming.
TheDraw was a cornerstone of my teenage years. I would log into different BBSs just to see their ANSI welcome screens, then I would try and re-create them to learn the art. It was a unique form of animation and I was hoping you had figured out how to get TheDraw working.
I also later used ANSI to make my own cool command line prompts in DOS and later, Linux.