What powers htmllint.net?

Last seen Jul 2018 · 3 technologies across 2 categories

Web Servers

Nginx
since Dec 2017

Widgets

Google Plus
since Jan 2016
Twitter
since Jan 2016

AI Crawlers

No robots.txt, so all AI crawlers are allowed by default. Checked Oct 2026.

  • robots.txt not found
  • llms.txt not found
  • ai.txt not found

See who blocks each AI crawler across the web

AI Crawlers

No robots.txt, all AI crawlers allowed

Full breakdown

Audience

  • 100% desktop
  • Japan

Where the site's Chrome visitors come from, largest estimated audience first.

Open Page Rank

3.67 / 10 · ranked #775,926 of all domains

59 referring domains · OpenPageRank

Core Web Vitals

LCP0.5 s
INP50 ms
CLS0
TTFB500 ms

Real user p75, Chrome UX Report, Sep 2026.

Infrastructure

DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted

Full technology history →
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