htmlvalidator.com Review

TitletagDescriptiontaglanguage
Powerful CSS & HTML Validation Software for Windows, Mac, and Linux ✅ English
Alexarank
198082
Ip adress104.21.17.146Nameserverdamon.ns.cloudflare.com
kayleigh.ns.cloudflare.com
Status code200
robots.txt -http://htmlvalidator.com/robots.txt
 # As a condition of accessing this website, you agree to abide by the following
# content signals:

# (a)  If a Content-Signal = yes, you may collect content for the corresponding
#      use.
# (b)  If a Content-Signal = no, you may not collect content for the
#      corresponding use.
# (c)  If the website operator does not include a Content-Signal for a
#      corresponding use, the website operator neither grants nor restricts
#      permission via Content-Signal with respect to the corresponding use.

# The content signals and their meanings are:

# search:   building a search index and providing search results (e.g., returning
#           hyperlinks and short excerpts from your website's contents). Search does not
#           include providing AI-generated search summaries.
# ai-input: inputting content into one or more AI models (e.g., retrieval
#           augmented generation, grounding, or other real-time taking of content for
#           generative AI search answers).
# ai-train: training or fine-tuning AI models.

# ANY RESTRICTIONS EXPRESSED VIA CONTENT SIGNALS ARE EXPRESS RESERVATIONS OF
# RIGHTS UNDER ARTICLE 4 OF THE EUROPEAN UNION DIRECTIVE 2019/790 ON COPYRIGHT
# AND RELATED RIGHTS IN THE DIGITAL SINGLE MARKET.

# BEGIN Cloudflare Managed content

User-agent: *
Content-Signal: search=yes,ai-train=no
Allow: /

User-agent: Amazonbot
Disallow: /

User-agent: Applebot-Extended
Disallow: /

User-agent: Bytespider
Disallow: /

User-agent: CCBot
Disallow: /

User-agent: ClaudeBot
Disallow: /

User-agent: Google-Extended
Disallow: /

User-agent: GPTBot
Disallow: /

User-agent: meta-externalagent
Disallow: /

# END Cloudflare Managed Content

HTTP/1.1 301 Moved Permanently
Date: Sat, 28 Feb 2026 02:23:58 GMT
Content-Type: text/html; charset=iso-8859-1
Transfer-Encoding: chunked
Connection: keep-alive
Server: cloudflare
referrer-policy: same-origin
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Content-Security-Policy: default-src https: data: 'unsafe-eval' 'unsafe-inline'; manifest-src 'self'
Permissions-Policy: camera=(), microphone=()
Strict-Transport-Security: max-age=31536000; includeSubDomains
Location: https://htmlvalidator.com/
x-xss-protection: 1; mode=block
expect-ct: max-age=86400, enforce
cf-cache-status: DYNAMIC
Server-Timing: cfCacheStatus;desc="DYNAMIC"
Server-Timing: cfEdge;dur=163,cfOrigin;dur=3
Report-To: {"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=KdtgUiJCaDbH4HRURr0yfZvVz89m8uvBDAnxToFjXy6Uo1JC5uEX37LU6MUZCobZjzsLehfgoL9%2B8Q3j%2BH8O0kHfpvXkHtL%2FbQvEo7kWNA%3D%3D"}]}
Nel: {"report_to":"cf-nel","success_fraction":0.0,"max_age":604800}
CF-RAY: 9d4c7684e9d975ea-NRT
alt-svc: h3=":443"; ma=86400

HTTP/1.1 302 Found
Date: Sat, 28 Feb 2026 02:23:58 GMT
Content-Type: text/html; charset=iso-8859-1
Transfer-Encoding: chunked
Connection: keep-alive
referrer-policy: same-origin
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
content-security-policy: default-src https: data: 'unsafe-eval' 'unsafe-inline'; manifest-src 'self'
permissions-policy: camera=(), microphone=()
strict-transport-security: max-age=31536000; includeSubDomains
location: https://www.htmlvalidator.com/
Server: cloudflare
x-xss-protection: 1; mode=block
cf-cache-status: DYNAMIC
Server-Timing: cfCacheStatus;desc="DYNAMIC"
Server-Timing: cfEdge;dur=177,cfOrigin;dur=10
Report-To: {"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=zy7PF1nw2IrCTfY4tIohv1GB2zKHOlXJifbA0vOVkZe3ZzYL%2BK05otBiQmi%2FZB0dqNPSh6Ye27UcZCM2OSIUZwkOQrYo7Hc9%2Be5oM0Ze0A%3D%3D"}]}
Nel: {"report_to":"cf-nel","success_fraction":0.0,"max_age":604800}
expect-ct: max-age=86400, enforce
CF-RAY: 9d4c76863b479b05-NRT
alt-svc: h3=":443"; ma=86400

HTTP/1.1 200 OK
Date: Sat, 28 Feb 2026 02:23:58 GMT
Content-Type: text/html; charset=UTF-8
Transfer-Encoding: chunked
Connection: keep-alive
link: ; rel="preload"; as="style"
referrer-policy: same-origin
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
content-security-policy: default-src https: data: 'unsafe-eval' 'unsafe-inline'; manifest-src 'self'
permissions-policy: camera=(), microphone=()
strict-transport-security: max-age=31536000; includeSubDomains
vary: Accept-Encoding,User-Agent
expect-ct: max-age=86400, enforce
Server: cloudflare
x-xss-protection: 1; mode=block
cf-cache-status: DYNAMIC
Server-Timing: cfCacheStatus;desc="DYNAMIC"
Server-Timing: cfEdge;dur=167,cfOrigin;dur=13
Report-To: {"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=SzvLEMDb4QD1G9GsXTC53POr9it0Rm1H8ItWQNCl%2Fmk8UII%2FqryeQ52xck75ecPYCRIpXXEvAF7B%2Fn5Rsz2bLcEghENiwAJczZnT1m6tulQzGEU%3D"}]}
Nel: {"report_to":"cf-nel","success_fraction":0.0,"max_age":604800}
Content-Encoding: br
CF-RAY: 9d4c76879b99e3a1-NRT
alt-svc: h3=":443"; ma=86400

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