The UI is also mobile friendly for slicing on the go.
Direct print is supported for many models, though CORS proxying is often needed.
It also supports a minimal level of TinkerCAD-style CSG modeling, as well as importing models from https://cubbycad.com
I've been using it extensively when I need to trigger prints at home from my work computer.
Take it for a test drive!
The frontend is built on Nuxt UI. GitHub repo here: https://github.com/JoshTheDerf/cubbyslicer