validator.w3.org

The W3C Markup Validation Service

W3C's easy-to-use markup validation service, based on SGML and XML parsers.

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About validator.w3.org

Domain	validator.w3.org
MD5	7f81422f68de2a1a160de03d362dd48c
Keywords	HTML, HyperText Markup Language, Validation, W3C Markup Validation Service
Charset	UTF-8

Page Speed	Check now
Web server	Apache/2.4.51 (Debian)
IP Address	128.30.52.39

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# robots.txt for validator.w3.org
#

User-agent: *
Disallow: /check
Disallow: /feed/check
Disallow: /checklink
Disallow: /mobile/check
Disallow: /mobile/alpha
Disallow: /css-validator
Disallow: /unicorn/check
Disallow: /http-checker
Disallow: /i18n-checker/check
Disallow: /nu