Do you know https://godbolt.org/ ?
Awesome tool.

Does anyone know about something like this, except a normal offline app, instead of server nonsense?

Host it I guess:

https://github.com/compiler-explore...

@Demolishun yes, i know it's possible.
that's still server nonsense, that's why i explicitly said "offline desktop app instead of server nonsense".

clang -S -mllvm source.c

In all seriousness, I don't think desktop apps exist anymore. Best you can get is a webapp wrapped with a browser.

@lungdart ...sadly, I'm slowly starting to lump electron and suchcrap into the desktop app cathegory.

so that one would suffice too. main point is so that i don't have to mess around with server-side administration nonsense to get it running.

@Midnight-shcode I think the closest you can get in something like Qt Creator and then add compilers as needed. It mostly has support for c++ though. But you can add any compiler you want and debug the output. If you have embedded tools you can debug on embedded systems too. We do that with ARM systems at work.