stackmonkey.dev

Last checked 18m ago · 3 issues found

96Overall

94Speed

100SEO

88Security

100AI readiness

Check your own site

Speed 1 to fix

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Total Blocking Time
250 ms
Fix: 🔒 Unlock with Pro
✓
Server response time
Homepage started responding in 39 ms.
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Mobile performance score
94/100 on Google PageSpeed (mobile)
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Largest Contentful Paint
1.7 s
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Cumulative Layout Shift
0
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Desktop performance score
99/100 on Google PageSpeed (desktop)

SEO all good

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Homepage returns 200
HTTP 200
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Title tag
"Free System Design Simulator: Draw and Run | StackMonkey" (56 chars)
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Meta description
157 characters
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One H1 heading
1 H1 tag(s) found.
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Canonical URL
https://stackmonkey.dev/
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Page can be indexed
No noindex directive.
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Language declared
lang="en"
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Mobile viewport
Viewport meta tag present.
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Social share tags
og:title, og:description, og:url and og:type set, and og:image loads.
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Image alt text
0 of 2 images have no alt attribute.
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Short redirect chain
http://stackmonkey.dev/ takes 1 redirect(s): 301 → https://stackmonkey.dev/
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Enough content on the page
3472 words of visible text.
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Character encoding
Charset declared in the HTML.
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Favicon
Favicon found.
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X (Twitter) card tags
twitter:card = summary_large_image, image set
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Missing pages return 404
A made-up URL returns 404.
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www and non-www go to one address
www.stackmonkey.dev redirects to stackmonkey.dev.
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robots.txt
Found at /robots.txt.
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XML sitemap
Found at https://stackmonkey.dev/sitemap.xml
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No broken internal links
Checked 15 internal links from the homepage.
✓
Inner page titles
Read 5 inner pages (/blog/, /about/, /validation/, /templates/url-shortener/, /templates/chat-service/). Every one has a title of a sensible length.
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No duplicate titles
The homepage and 5 inner pages all have different titles.
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Inner page meta descriptions
5 inner pages each have their own meta description.
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Inner pages have one H1
5 inner pages each have exactly one H1.
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Inner pages canonical to themselves
5 inner pages each have a canonical tag pointing at their own URL.
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Accessibility
96/100 on Google Lighthouse
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Best practices
92/100 on Google Lighthouse

Security 2 to fix

!
Content Security Policy
A policy is set, but script-src allows 'unsafe-inline' without a nonce or hash, so injected inline scripts still run.
Fix: 🔒 Unlock with Pro
!
DMARC policy (email spoofing)
Policy is p=none, which only monitors. Spoofed email is still delivered.
Fix: 🔒 Unlock with Pro
✓
Served over HTTPS
The homepage loads over HTTPS.
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HTTP redirects to HTTPS
http:// returns 301 to HTTPS.
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HSTS header
strict-transport-security: max-age=31536000; includeSubDomains; preload
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Clickjacking protection
X-Frame-Options: SAMEORIGIN
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X-Content-Type-Options
x-content-type-options: nosniff
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Referrer-Policy
referrer-policy: strict-origin-when-cross-origin
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Permissions-Policy
permissions-policy: accelerometer=(), autoplay=(), camera=(), encrypted-media=(), fullscreen=*, geolocation=(), gyroscope=(), interest-cohor
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No mixed content
All resources load over HTTPS.
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Server software not exposed
No software versions in response headers.
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Cookies set securely
The homepage sets no cookies.
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SPF record (email spoofing)
v=spf1 include:_spf.mx.cloudflare.net include:zoho.in ~all

AI readiness all good

i
NIST, MITRE and CISA citations resolve
No NIST, MITRE or CISA links found on the homepage and 6 linked content pages and posts. Only scored on sites that cite them.
✓
AI crawlers allowed in robots.txt
GPTBot, ClaudeBot, PerplexityBot and others are not blocked.
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AI crawlers not blocked by firewall
Homepage loads for GPTBot, OAI-SearchBot, ClaudeBot and PerplexityBot.
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Content readable without JavaScript
3472 words in the raw HTML. Most AI crawlers don't run JavaScript.
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Inner pages readable without JavaScript
5 inner pages each have 100+ words in the raw HTML.
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Content split into headed sections
25 H2/H3 headings in the raw HTML. Answer engines lift passages section by section, using the heading to know what each one is about.
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llms.txt file
Found at /llms.txt (4632 characters).
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Structured data (schema.org)
JSON-LD types: Organization, WebApplication, FAQPage.
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Structured data on inner pages
5 inner pages all carry valid JSON-LD.
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Answers real questions
FAQPage schema found.
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Content shows when it was updated
Most recent update date found: 2026-11-10.
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Clear page summary
AI answers often reuse your title and meta description to describe you.

Domain all good

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Domain age
Registered 2026-10-22 (0 months ago).
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Registrar
Name.com, Inc.
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Hosting network
Not available.