developer.mozilla.org source code

The homepage of developer.mozilla.org is 114.4 KB of HTML built with Cloudflare, Fastly. Its security headers get a B. We last checked it on 2026-10-27.

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Address	https://developer.mozilla.org/en-US/
Status	200 after 1 redirect
Title	MDN Web Docs
Description	The MDN Web Docs site provides information about Open Web technologies including HTML, CSS, and APIs for both Web sites and progressive web apps.
Language	en-US
Built with	Cloudflare, Fastly
Scripts	5 external, 1 inline
Stylesheets	20
Security headers	B · see the headers

The first lines of its HTML

<!doctype html>
<html lang="en-US" data-theme="light dark" data-renderer="Homepage" >
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>
      MDN Web Docs
    </title>
    <script>
      try {
      document.documentElement.dataset.theme =
      localStorage.getItem("theme") || "light dark";
      } catch (error) {
      console.warn("Unable to set theme", error);
      }
      try {
      if (localStorage.getItem("nop") === "yes") {
      document.documentElement.dataset["nop"] = "yes";
      }
      } catch (error) {
      console.warn("Unable to set nop", error);
      }
    </script>
    <link rel="stylesheet" href="/static/client/styles-global.19cc0c980e463125.css" fetchpriority="high" />
    <link rel="stylesheet" href="/static/client/styles-homepage.0980eec27925cc11.css" fetchpriority="high" />
    <link rel="stylesheet" href="/static/client/styles-homepage-header.da8a69fafe1cfb00.css" fetchpriority="high" />
    <link rel="stylesheet" href="/static/client/styles-homepage-hero.61cf31e2c2f1b72c.css" fetchpriority="high" />
    <link rel="stylesheet" href="/static/client/styles-mandala.8fbfeb0567dbde40.css" fetchpriority="high" />
    <link rel="stylesheet" href="/static/client/styles-homepage-body.22274e9a4a78b7ae.css" fetchpriority="high" />
    <link rel="stylesheet" href="/static/client/styles-featured-articles.770034368883a9ae.css" fetchpriority="high" />

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