Excel to JSON to define Coordinates?

Hello,

we created a nice WLED-Wall-Art that has a bit of an

\___/
/   \

Shape.
Now, I need to create a custom Component for SignalRGB that gives the coordinates to SignalRGB.
I have done this manually for a simple component with 12 LEDs before, but here we have about 100.
It would be simple to fill an Excel-Sheet with the Numbers of the LED and have the Rows/columns be the x/y coordinates.
Does such a Excel2Json Converter exist on any of your computers already?

Greetings,
Hendrik

Hm, if there is no Excel2Json… How do you/would you create such a complex shape?