So, this is perhaps a bit specific, but in a previous job I used an online tool that allowed me to define a process flow completely in text, and it rendered a visual process flow that could be used to share. Unfortunately, I can't remember the name of it and all searches have come up with is the basic Draw.io, LucidChart, etc, that are visual tools. They're great tools, don't get me wrong, but sometimes I just want to define my flow and not spend time worrying how it looks.

Any chance someone here is familiar with that tool, or one like it, and can point me in the right direction?

Edit:
Nevermind! I think I finally found it! I was using the wrong words, once I tried "sequence diagram" I found what I was looking for (at an obviously named website): https://sequencediagram.org/