Previously I made a params file creation and modification Python 3 module, as mentioned here: https://www.rosettacommons.org/node/10811
Since then I did get round to pip releasing it and I also threw together a webpage that does it: https://direvo.mutanalyst.com/params
I apologise that it is tagged onto a homeserver that does something completely different: it's a home project and honestly I did not want to do the Apache config, DNS & SSL sys-admin stuff.
Unfortunately, I keep meaning to add a JS molecular sketcher library to the page, but I have not had the time, so I think I'll leave it as is.
I am also leaving alone the shortfall that the server does not test the topology file (which the module can do) in Pyrosetta, because it is a home server not a University server (legal pickle) and I don't want to burden it.
But other feedback welcome* and hopefully it might be handy for someone.
*) Ehr... the feedback button is disabled on the server due to misuse, so for PMing feel free to email matteo at well dot ox dot ac dot uk.