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https://workers.dev

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
92
GRADE
A
FIX
0
REVIEW
3
PASS
6
INFO
0
Probed from Madrid, Spain
301 Moved Permanently
Checks
9
6 PASS 3 REVIEW
C
Crawlability
Action
robots.txt present, sitemap with 0 URLs
REVIEW
robots.txt present, sitemap with 0 URLs
Info::
robots.txt is present
Got: 10240 bytes
Info::
sitemap.xml is present
Warning::
sitemap.xml contains invalid XML
Search engines may not be able to parse the sitemap. Fix XML validation errors.
Warning::
sitemap.xml is empty — no URLs found
An empty sitemap provides no value. Add <url> entries for your pages.
Info::
robots.txt does not reference a sitemap
Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

Search engines may not be able to parse the sitemap. Fix XML validation errors.

Why this matters

An unparseable sitemap is silently ignored by Google — the URLs it advertises are never queued for crawl.

Learn more ▾

Google's sitemap parser is strict about XML validity. A single unescaped `&` or unclosed tag invalidates the whole file. Run your sitemap through a validator (Search Console's Sitemaps report flags it) and fix the offending entry. Most generators escape correctly; mistakes usually come from manually-written entries.

Source: sitemaps.org / Google Search Central

An empty sitemap provides no value. Add <url> entries for your pages.

Why this matters

An empty sitemap signals 'no content to index' to Google — actively harmful versus having no sitemap at all.

Learn more ▾

Google compares URLs in the sitemap against URLs it has crawled. An empty sitemap on a site with thousands of pages signals abandonment. Either populate it correctly (most CMSes auto-generate) or delete the file and let Google crawl normally.

Source: Google Search Central / sitemaps.org

Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

Why this matters

robots.txt omits Sitemap: directive — crawlers must fetch /sitemap.xml by convention; reliable but missing the explicit hint.

Source: sitemaps.org

robots.txt 200 OK
Size 10240 B Sitemaps referenced 0 User-agents Blocking No — crawling allowed
<!DOCTYPE html><!--
  Cloudflare Site
  
  Tech Stack:
  - Cloudflare Workers (Deployment)
  - Astro 5.x (Static Site Framework)
  - React 19.x, TypeScript 5.x, Tailwind CSS v4 (UI)
--><html lang="en"> <head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><!-- Define __name helper FIRST - esbuild generates this when minifying with keepNames --><script>
      // Must be defined before any other scripts run
      (function () {
        var __name = function (_n, v) {
          return v;
        };
        // Define numbered variants that esbuild might use
        for (var i = 0; i < 1000; i++) {
          this['__name' + i] = __name;
        }
      }).call(
        typeof globalThis !== 'undefined'
          ? globalThis
          : typeof window !== 'undefined'
            ? window
            : typeof self !== 'undefined'
              ? self
              : this,
      );
    </script><!-- Theme initialization script - MUST run first before any rendering --><script>
      (function () {
        try {
          // Check for admin preview theme override via query parameter
          var urlParams = new URLSearchParams(window.location.search);
          var themeParam = urlParams.get('theme');

          // Store the override preference for the change listener to respect
          window.__themeOverride = themeParam;

          if (themeParam === 'dark') {
            // Admin preview: force dark mode
            document.documentElement.classList.add('dark');
            return;
          } else if (themeParam === 'light') {
            // Admin preview: force light mode
            document.documentElement.classList.remove('dark');
            return;
          }

          // themeParam === 'system' or no param: use system preference
          if (typeof window !== 'undefined' && window.matchMedia) {
            var mediaQuery = window.matchMedia('(prefers-color-scheme: dark)');
            var systemPrefersDark = mediaQuery.matches;

            // Apply theme to html element before any content renders
            if (systemPrefersDark) {
              document.documentElement.classList.add('dark');
            } else {
              document.documentElement.classList.remove('dark');
            }
          }
        } catch (e) {
          // Silently fail - default to light mode
        }
      })();
    </script><!-- Filter browser extension console errors --><!-- Animated Cloud Console Log --><meta name="generator" content="Astro v5.18.1"><script>(function() {
          // Ensure __name helper exists (esbuild may generate __name calls when minifying)
          if (typeof __name === 'undefined') {
            var __name = function(n, v) { return v; };
          }
          
          // Skip if already initialized (prevents duplicate listeners on View Transitions)
          if (window.__screenZoomInitialized) return;
          window.__screenZoomInitialized = true;
          
          var updateZoom = function() {
            const screenHeight = window.innerHeight
            let zoomScale = 1

            if (screenHeight <= 740) {
              zoomScale = 0.8
            } else if (screenHeight <= 800) {
              zoomScale = 0.8 + (screenHeight - 740) * 0.0033
              zoomScale = Math.min(zoomScale, 1)
            }

            if (zoomScale !== 1) {
              document.documentElement.style.zoom = zoomScale.toString()
            } else {
              document.documentElement.style.zoom = ""
            }
          }

          // Only apply zoom adjustments on desktop Safari where viewport height collapses
          const isDesktop = window.matchMedia("(pointer: fine)").matches
          if (isDesktop) {
            updateZoom()
            window.addEventListener("resize", updateZoom)
            
            // Cleanup on Astro View Transitions
            document.addEventListener("astro:before-swap", function cleanup() {
              window.removeEventListener("resize", updateZoom)
              window.__screenZoomInitialized = false;
              document.removeEventListener("astro:before-swap", cleanup)
            })
          }
        })()</script><script type="module" src="/_astro/_layout.astro_astro_type_script_index_2_lang.DNo_k8IE.js"></script><!-- Listen for system preference changes after page load --><script>
      (function () {
        try {
          var mediaQuery = window.matchMedia('(prefers-color-scheme: dark)');
          var handleSystemThemeChange = function (e) {
            // Skip if theme is overridden by admin preview (light or dark)
            // Only respond to system changes when theme=system or no theme param
            if (window.__themeOverride && window.__themeOverride !== 'system') {
              return;
            }

            if (e.matches) {
              document.documentElement.classList.add('dark');
            } else {
              document.documentElement.classList.remove('dark');
            }
          };

          // Modern browsers
          if (mediaQuery.addEventListener) {
            mediaQuery.addEventListener('change', handleSystemThemeChange);
          } else {
            // Fallback for older browsers - addListener is deprecated but needed
            // Type assertion to avoid deprecation warning
            /** @type {any} */
            var legacyQuery = mediaQuery;
            legacyQuery.addListener(handleSystemThemeChange);
          }
        } catch (e) {
          // Silently fail
        }
      })();
    </script><!-- Favicon --><link rel="icon" type="image/x-icon" href="/favicon.ico"><link rel="shortcut icon" type="image/x-icon" href="/favicon.ico"><!-- Preload critical fonts to reduce FOUT --><link rel="preload" href="/fonts/Kunst%20Grotesk%20Regular.woff2" as="font" type="font/woff2" crossorigin><link rel="preload" href="/fonts/Kunst%20Grotesk%20Medium.woff2" as="font" type="font/woff2" crossorigin><!-- Preconnect for Cloudflare Images delivery --><link rel="preconnect" href="https://imagedelivery.net" crossorigin><!-- DNS Prefetch for CDN (lower priority than preconnect) --><link rel="dns-prefetch" href="https://cdn.jsdelivr.net"><!-- Primary Meta Tags --><title>Cloudflare</title><meta name="title" content="Cloudflare"><meta name="description" content="Welcome to the Cloudflare - Powering the next generation of applications"><link rel="canonical" href="https://workers.cloudflare.com/"><!-- Open Graph Meta Tags --><meta property="og:type" content="website"><meta property="og:url" content="https://workers.cloudflare.com/"><meta property="og:title" content="Cloudflare"><meta property="og:description" content="Welcome to the Cloudflare - Powering the next generation of applications"><meta property="og:image" content="https://workers.cloudflare.com/preview.png"><!-- Twitter Card Meta Tags --><meta name="twitter:card" content="summary_large_image"><meta name="twitter:url" content="https://workers.cloudflare.com/"><meta name="twitter:title" content="Cloudflare"><meta name="twitter:description" content="Welcome to the Cloudflare - Powering the next generation of applications"><meta name="twitter:image" content="https://workers.cloudflare.com/preview.png"><!-- AI/LLM Discovery --><link rel="llms-txt" href="/llms.txt"><link rel="alternate" type="text/markdown" href="/.md"><!-- Preload likely LCP hero image --><!-- OneTrust Cookie Consent SDK --><script type="text/javascript" src="https://ot.www.cloudflare.com/ot/scripttemplates/otSDKStub.js" data-domain-script="b1e05d49-f072-4bae-9116-bdb78af15448" data-document-language="true" charset="UTF-8"></script><script type="text/javascript">
      function OptanonWrapper() {}
    </script><link rel="stylesheet" href="/_astro/_editorPath_.D7O2pGyb.css">
<style>article>div>*{transition:opacity .3s ease-out}.blog-content>*{transition:opacity .3s ease-out}.section-fade-out{opacity:.2!important;transition:opacity .3s ease-out!important}.section-fade-in{opacity:1!important;transition:opacity 1s ease-in!important}:global(html.dark) .blog-content :not(pre)>code{background-color:#ffffff14}
</style>
<link rel="stylesheet" href="/_astro/index.BTYsgzhb.css">
<style>.learning-content>*{transition:opacity .3s ease-out}.section-fade-out{opacity:.2!important;transition:opacity .3s ease-out!important}.section-fade-in{opacity:1!important;transition:opacity 1s ease-in!important}:global(html.dark) .learning-content :not(pre)>code{background-color:#ffffff14}.learning-cta{display:flex;flex-direction:column;gap:.5rem;margin:2rem 0;padding:1.25rem 1.5rem;border-radius:.75rem;border:1px solid var(--color-border-100);background:var(--color-background-200)}.learning-cta-label{display:inline-flex;align-self:flex-start;padding:.125rem .625rem;border-radius:9999px;font-size:.75rem;font-weight:600;letter-spacing:.02em;color:var(--color-accent-100);background:color-mix(in srgb,var(--color-accent-100) 10%,transparent)}.learning-cta-title{margin:0!important;font-size:1rem!important;font-weight:500;line-height:1.5;color:var(--color-foreground-100)}.learning-cta-link{display:inline-flex;align-items:center;gap:.25rem;font-size:.875rem;font-weight:500;color:var(--color-accent-100)!important;text-decoration:none!important;transition:opacity .15s ease}.learning-cta-link:hover{opacity:.8}.learning-cta--compact{flex-direction:row;align-items:center;gap:1rem}.learning-cta--compact .learning-cta-link{margin-left:auto;white-space:nowrap}.learning-figure{margin:1.5rem 0;display:flex;flex-direction:column;align-items:center;gap:.5rem}.learning-figure img{margin:0!important;max-width:100%;border-radius:.5rem;box-shadow:0 1px 3px #00000014}.learning-figure figcaption{font-size:.8125rem;color:var(--color-foreground-100);opacity:.5;text-align:center;line-height:1.5;max-width:80%}
.use-cases-header[data-astro-cid-7amrcyfe]{grid-row:1 / 2}@media(min-width:768px){.use-cases-header[data-astro-cid-7amrcyfe]{grid-row:1 / var(--totalRows)}.flip-layout-item[data-astro-cid-7amrcyfe]{grid-column:auto;grid-row:var(--grid-row)}.flip-layout-cta[data-astro-cid-7amrcyfe]{grid-column:1;grid-row:var(--cta-row)}}.programs-header[data-astro-cid-b5bhyuqa]{grid-row:1 / 2}@media(min-width:768px){.programs-header[data-astro-cid-
sitemap.xml 200 OK
Type URL Set URLs 0 entries Valid XML No
B
TLS Certificate Expiry & Recommendations
50 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

50
days left
0d 30d 60d 90d+

Recommended actions

  • Enable HSTS: Strict-Transport-Security: max-age=31536000; includeSubDomains
  • Enable DNSSEC on your domain for DNS spoofing protection
  • Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy
B
CDN & Delivery
Cloudflare
REVIEW
Cloudflare
Info::
Site is served via Cloudflare CDN (edge: CDG)
Got: cf-ray: 9ed4b9516e9fd373-CDG
CDN Detected: Cloudflare
Provider Cloudflare Evidence cf-ray: 9ed4b9516e9fd373-CDG
A+
DNS Records
2 A records, 35 ms lookup
PASS
2 A records, 35 ms lookup
Info::
Resolves to 2 IPv4 address(es)
Got: 104.18.12.15, 104.18.13.15
Info::
Has 2 IPv6 (AAAA) record(s)
Got: 2606:4700::6812:c0f, 2606:4700::6812:d0f
Info::
2 nameserver(s) configured
Got: sofia.ns.cloudflare.com, clyde.ns.cloudflare.com
Info::
No MX records — email not configured via DNS
Info::
CAA records not checked
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Info::
SPF record present in TXT
Info::
DNS resolution time: 35 ms
Got: 35 ms
A104.18.12.15, 104.18.13.15
AAAA2606:4700::6812:c0f, 2606:4700::6812:d0f
CNAME—
NSsofia.ns.cloudflare.com, clyde.ns.cloudflare.com
MX—
TXT
SPF v=spf1 -all
CAALookup not available with standard resolver
Resolved in 35 ms

CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.

Why this matters

Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.

A
Redirect Chain
1 redirect(s), 557 ms total
PASS
1 redirect(s), 557 ms total
Info::
Single redirect
Got: https://workers.dev → https://workers.cloudflare.com (301)
Info::
Redirect overhead: 557 ms total
Got: 557 ms
Info::
Cross-domain redirect detected

https://workers.dev

65 ms · HTTP/1.1

301

https://workers.cloudflare.com

492 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://workers.dev30165 msHTTP/1.1cloudflare
2https://workers.cloudflare.com200492 msHTTP/1.1cloudflare

See the visual redirect chain in the HTTP Probe tab →

A+
IPv6 Readiness
IPv6 reachable (17 ms)
PASS
IPv6 reachable (17 ms)
Info::
IPv6 is configured and reachable at 2606:4700::6812:c0f, 2606:4700::6812:d0f
Got: 17 ms connect
IPv6 Ready
AAAA Records 2606:4700::6812:c0f, 2606:4700::6812:d0f Connection Reachable (17 ms)
A+
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
PASS
www/non-www, trailing slash, HTTP→HTTPS
Info::
www/non-www redirect configured correctly (preferred: non-www)
Info::
HTTP correctly 301-redirects to HTTPS

www / non-www

301https://www.workers.dev/
200https://workers.dev/

Preferred variant: non-www

HTTP → HTTPS

301http://workers.dev/ → https://workers.cloudflare.com

Consistent

A+
Domain Intelligence
workers.dev — via CloudFlare, Inc., 7 years, 3 months old
PASS
workers.dev — via CloudFlare, Inc., 7 years, 3 months old
Info::
Domain registered until Feb 8, 2027 (9 months remaining)
Info::
DNSSEC is not enabled
DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.
Info::
Registrar: CloudFlare, Inc.
Warning::
Registrar lock is NOT enabled
The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.
Domain expiry

210 days

February 8, 2027

SSL certificate

50 days

Issued by Google Trust Services

Domain age

7 years, 3 months

Registered February 8, 2019

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

Unknown

2606:4700::6812:c0f

Registrar

CloudFlare, Inc.

Unlocked 2 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Enable DNSSEC to protect visitors from DNS spoofing
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar CloudFlare, Inc.
Created February 8, 2019 (7 years, 3 months ago)
Expires February 8, 2027 (9 months)
Last Updated November 16, 2025
Name Servers clyde.ns.cloudflare.com, sofia.ns.cloudflare.com
DNSSEC Not enabled
Hosting
IP Address 2606:4700::6812:c0f
Data source: rdap (0.2s)

DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.

Why this matters

Without DNSSEC, an attacker who can poison your DNS can hijack your domain — and SSL certs alone don't stop them.

Learn more ▾

DNSSEC adds cryptographic signatures to DNS records, preventing forged responses from poisoning resolver caches. Without it, an attacker who controls the network path can redirect your domain to a malicious server before any HTTPS handshake happens. Most modern registrars (Cloudflare, Google Domains, Route 53) enable it with one toggle.

Source: ICANN / RFC 4033

The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.

Why this matters

Without registrar lock, an attacker who phishes your registrar credentials can transfer the domain in minutes — total brand hijack.

Learn more ▾

Registrar lock (clientTransferProhibited, clientUpdateProhibited, clientDeleteProhibited) requires extra verification before any transfer/update/delete. Every major registrar offers it free. Combined with 2FA on your registrar account, it's the strongest defense against domain hijacking.

Source: ICANN / domain-security best practice

A+
HTTP Probe Timing
Total 95 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
31 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
17 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
23 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
95 ms
Total Time Total request time from DNS lookup through full response.
95 ms

Connection waterfall

DNS Lookup 31 ms TCP Connect 17 ms TLS Handshake 23 ms Server Processing 24 ms Content Transfer 0 ms
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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