stackoverflow.com source code

The homepage of stackoverflow.com is 5.7 KB of HTML built with Cloudflare. Its security headers get a B. We last checked it on 2026-10-27.

stackoverflow.com showed us a bot check instead of its homepage, so the details below are of that check.

See the full source

The first lines of its HTML

<!DOCTYPE html>
<html lang="en-US">
  <head>
    <title>
      Just a moment...
    </title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=Edge">
    <meta name="robots" content="noindex,nofollow">
    <meta name="viewport" content="width=device-width,initial-scale=1">
    <meta http-equiv="content-security-policy" content="default-src &#39;none&#39;; script-src &#39;nonce-Lr2o7LSxPVlywZTQxWCEkR&#39; &#39;unsafe-eval&#39; http…
    <style>
      *{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacS…
    </style>
    <meta http-equiv="refresh" content="360">
  </head>
  <body>
    <div class="main-wrapper" role="main">
      <div class="main-content">
        <noscript>
          <div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div>
        </noscript>
      </div>
    </div>
    <script nonce="Lr2o7LSxPVlywZTQxWCEkR">
      (function(){window._cf_chl_opt = {cFPWv: 'g',cH: 'x9IWX2V_FMGWA.7B2XIOxxtPtIs0w0ScuG2L_6znWTQ-1793122681-1.2.1.1-zUecbQ7DnOH_64byKksUlouKI6w0yw2JV5DNr3HSj…
    </script>
  </body>
</html>

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