We have a demo version of a web viewer for xschem schematics: https://xschem-viewer.com/?file=https://github.com/StefanSchippers/xschem_sky130/blob/main/sky130_tests/adder_16bit.sch

Wow!, nice! xschem can also display remote data directly (start following command from a directory where the sky130 xschemrc is present): xschem 'https://raw.githubusercontent.com/StefanSchippers/xschem_sky130/main/sky130_tests/adder_256bit.sch' xschem https://raw.githubusercontent.com/w32agobot/SKY130_SAR-ADC/main/xschem/adc_top_tb.sch in this case xschem needs the 'Raw' github data