What does StackOptic analyze?

StackOptic runs 18 analysis modules on any public website from a single URL. It detects 7,000+ technologies (CMS, frameworks, analytics, payments, CDN, hosting), evaluates SSL certificates and HTTP security headers with grades from A+ to F, measures Core Web Vitals (LCP, CLS, TBT, FCP), audits SEO meta tags and structured data, checks email security (SPF, DKIM, DMARC), analyzes AI & LLM readiness including bot access and llms.txt validation, extracts color palettes and typography, estimates carbon footprint, and generates permanent shareable reports.

Does it work on sites behind Cloudflare or bot protection?

Yes. StackOptic uses a real browser engine that loads pages exactly like a human visitor — executing JavaScript, rendering CSS, and handling redirects. This allows it to bypass Cloudflare, LiteSpeed, Sucuri, and other bot protection systems where traditional crawlers and HTTP-only tools fail.

What do I get on the free plan?

The free plan includes 5 analyses per day with access to all 18 modules, full scores, technology detection, and security grades. Every report is permanently accessible via a unique shareable URL — no login required to view. No credit card needed. AI-powered insights, re-analysis, PDF/JSON export, and comparison features are available on Pro ($24/mo) and Agency ($99/mo) plans.

What is AI & LLM readiness analysis?

This module evaluates how visible and citable your website is to AI search engines like ChatGPT, Perplexity, Google AI Overviews, and Claude. It audits access permissions for 8 major AI bots, validates llms.txt and llms-full.txt files, scores citation-ready content structure, and analyzes structured data (JSON-LD) for GEO readiness — helping you rank in the next generation of search.

How long does an analysis take?

Most analyses complete in under 10 seconds. StackOptic runs all 18 modules in parallel using a real browser session, so you get technology detection, security audit, performance metrics, SEO analysis, and AI readiness scoring simultaneously.

How accurate are the results?

Detection is based on real browser execution — DOM inspection, JavaScript runtime analysis, HTTP headers, and DNS records. With 7,000+ technology signatures and Lighthouse-calibrated performance scoring, StackOptic achieves high accuracy for mainstream technologies.

What security checks are performed?

The security module evaluates SSL/TLS certificates, 12+ HTTP security headers (HSTS, CSP, X-Frame-Options, Permissions-Policy, Referrer-Policy), HTTPS enforcement, and email authentication (SPF, DKIM, DMARC). Each site receives a letter grade from A+ to F with specific remediation steps.

Do you store the websites I analyze?

StackOptic only stores publicly available information that any visitor to a website would see — HTML content, HTTP headers, DNS records, and screenshots. We do not access private data, log in to websites, or perform any intrusive testing.

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worldgbc.org

https://worldgbc.org· First analyzed 25 Apr 2026· Updated 25 Apr 2026

Export

worldgbc.org

Mobile

Sponsored

Hosting Provider

WP Engine

wpengine.com

IP Address

141.193.213.10

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Austin, United States

ASN

AS209242

Organization

WPEngine, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns-1473.awsdns-56.org.ns-148.awsdns-18.com.ns-1841.awsdns-38.co.uk.ns-610.awsdns-12.net.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.6 s10%

Speed Index

2.1 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

576 KB

73 requests

Image Optimization

WebP

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

CMS

WordPressv6.9.4

Infrastructure

Hosting

WP Engine

CDN

Cloudflare

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

19 Technologies Detected

Plugins

Search Filter Pro Bbob Gdpr Cookie Compliance Mapsvg The Events Calendar Responsive Menu

Libraries

Analytics

CSS Frameworks

Meta Frameworks

Other

AOS (Animate On Scroll)

Fonts

Google Fonts

CDN

Cloudflare

SEO Analysis

B78/100

Meta Tags12/15

Content10/12

Headings7/8

Technical24/25

E-E-A-T0/7

Images1/7

Links5/5

URL5/5

Social4/5

Freshness4/4

Mobile3/4

Indexability3/3

worldgbc.orgworldgbc.org

Home - World Green Building Council

The World Green Building Council (WorldGBC) catalyses the uptake of sustainable and decarbonised built environments for everyone, everywhere.

Title Length35 chars

Recommended: 50-60 chars (~212px / 580px)

Description Length141 chars

Recommended: 120-160 chars

Issues (1)

• Most images missing alt text (2/3) — critical for accessibility and SEO

9 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

13 URLs

13 sub-sitemaps

robots.txt

6 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

23/100

Needs Work

6 11 1

Sponsored

AI & LLM Readiness

D50/100

Bot Access

20/25

Machine Read.

11/25

Schema Data

4/25

Citation

15/25

AI Bot Access

14/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

code blocksnav

Text ratio:0%

Words:972

Token eff.:Optimal

Sections/1K:12.3

Depth:2/5

Structured Data

3 JSON-LD

WebSiteBreadcrumbListSearchAction

Citation Readiness

Opening Summary246w

Descriptive Headingsavg 8w

Canonical URL

Open Graph2/3

Twitter Card1/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (9)

AI readiness recommendation preview...

Upgrade to view recommendations

Sponsored

Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

52/100

Passed

Critical

Warnings

Images & Alt Text

5/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

17/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

2/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

15/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

8/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

5/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

4 recommendations

•Accessibility recommendation preview...

Upgrade to view recommendations

Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

75/100

58 mg

CO₂e / view

575.6 KB

Page Weight

80%

Cleaner Than

New Visitor

66 mg

Returning (cached)

33 mg

Annual (10K/mo)

7.0 kg

Emission Segments

Data Center

3 mg

Network

17 mg

Device

38 mg

Resource Breakdown

Images

480.9 KB

HTML

24.4 KB

Other

70.3 KB

Green Hosting Verified

Google Cloud

GWF Verified

2 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

41%Poor

Interactive

HTTPS

WAF

39d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

06.03.2026

Valid Until

04.06.2026

Subject Alternative Names (1)

worldgbc.org

SHA-256 Fingerprint

6F:01:4A:C2:44:AC:78:22:FC:EF:E2:95:4E:84:69:1C:80:37:0A:01...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400

cache-control

🟡 600s(max-age=600, must-revalidate)

cf-cache-status

DYNAMIC

cf-ray

9f1f637108a41be5-SJC

content-encoding

⚡ Brotli(br)

content-type

text/html; charset=UTF-8

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

worldgbc-org.mail.protection.outlook.com

Domain Information

worldgbc.org

Domain Age

26y 10m

Created

28.06.1999

Expires

28.06.2027

Last Updated

29.04.2022

Registrar

Network Solutions, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Notice (WP)

Cookie Consent Banner

Cookie Notice (WP)

GDPR Indicators

Cookie consent banner detected

CMP: Cookie Notice (WP)

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

80/100

Mobile Friendly1 breakpoint

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

Viewport

width=device-width,initial-scale=1.0

1 recommendation

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Roboto

WCAG Partial

75/100

Readability

/30

20/30

18px · LH 1.33

Hierarchy

/20

20/20

3.61x ratio · ✓ H1→H6

WCAG

/25

15/25

1:1 min contrast

Performance

/25

20/25

1 font · 3 req

Heading Font

Roboto

Sans65px

Body Font

Roboto

Sans18px

Contrast Ratio

1:1

16 issues

Reading Comfort

~35 CPL

Narrow lines

65px

22px

18px

✅ Excellent readability: 18px body text is ideal for all devices.

⚠️ Tight line spacing (1.33). Increase to 1.4–1.6 for better readability.

❌ Very complex text: Flesch score 18/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 16 elements below WCAG AA threshold (min 1.0:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 3.6x larger than body text.

GGoogle FontsFluid Type (rem)Flesch 18

Color Palette

9 unique colors

3.23:1 AA Large Light

#7e878e

Other· 19.1%

#f0f1f1

Background· 6.1%

#ffffff

Primary· 0%

#00040f

Background· 34.9%

#ad9e8b

Secondary· 8.4%

#0b1226

Primary· 5%

#1f384e

Secondary· 4.6%

#5d6f7d

Secondary· 3.9%

Business & Marketing Stack

6 Tools Detected

Enterprise

Behavior Analytics

KissmetricsMid-Market

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

GDPR Cookie ConsentFree

Cookie consent and privacy compliance tools

Social Media

Twitter/X WidgetsFree

LinkedIn WidgetsFree

Social widgets and sharing tools

Reviews & Social Proof

BazaarvoiceEnterprise

Customer reviews and testimonials

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

worldgbc.org(10)local(5)maps.googleapis.com(3)cdn.jsdelivr.net(1)player.vimeo.com(1)

Website Identity

Home - World Green Building Council

The World Green Building Council (WorldGBC) catalyses the uptake of sustainable and decarbonised built environments for everyone, everywhere.

worldgbc.org/

26 years old

Location detected: 🇺🇸 United Statesvia ip

Network Solutions, LLC📧 Microsoft 365en-US

Social Profiles

Facebook Instagram LinkedIn YouTube

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Last analyzed: 25 Apr 2026 at 18:26

Historical Analysis & Change Tracking