W3C

Validator.nu is a markup validation service operated by the World Wide Web Consortium (W3C) that checks HTML and other web documents for conformance to web standards. This bot visits websites when users submit URLs for validation, helping developers identify and fix markup errors to ensure proper web standards compliance.

W3C_CSS_Validator is a developer helper operated by W3C. If you think this is incorrect or can provide additional detail about its purpose, please let us know.

W3C_Validator is a developer helper operated by W3C. If you think this is incorrect or can provide additional detail about its purpose, please let us know.