To share somewhere, simply prefix your geo:0,0 url with geo.nathanaelhoun.fr.
Example link: https://geo.nathanaelhoun.fr/geo:46.23438,6.04526?z=20
Geo URls exist since 2010 but are not supported by many devices.
They could be a useful way to share location while being compatible with all map apps, according to your personal preferences. But they are not very well supported across the ecosystem.
So, this service is here to make a geo-url clickable. Simply prefix your geo url by this website, and share it!
Ex: geo:0,0 ⇒ geo.nathanaelhoun.fr/geo:0,0