LibreQR

QR codes generator

Help You can only encode whatever text you want.
Softwares which decode these QR codes could suggest to open them with dedicated software, depending on their URI scheme.

For instance, to open a webpage:
https://www.domain.tld/

To send an email:
mailto:contact@domain.tld

To share geographic coordinates:
geo:48.867564,2.364057

To call a phone number:
tel:+33639981871