W3C

W3C

https://www.w3.org/

https://www.alsacreations.com/astuce/lire/40-Quest-ce-que-le-W3C–A-quoi-sert-il-.html
( source :Alsacréations : https://www.alsacreations.com/)

As of 20 August 2020, the World Wide Web Consortium (W3C) has 434 Members.

W3C validator
https://validator.w3.org/