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clingendael.org

https://clingendael.org· First analyzed 27 Apr 2026· Updated 27 Apr 2026
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clingendael.org
Desktop screenshot of clingendael.org
Mobile screenshot of clingendael.org
Mobile

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Hosting Provider

Cloudflare
cloudflare.com

IP Address

104.26.10.118

Site Location

🇳🇱 Netherlandsvia phone

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

dee.ns.cloudflare.com.brodie.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
320 ms10%
Speed Index
416 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
14 KB
46 requests

Image Optimization

Lazy Load
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Drupal

Technology Stack

7 Technologies Detected

Other

2
GSAPv3.12.2ScrollMagic

Analytics

2
Google Analytics
Google Analytics 4

CSS Frameworks

1
Tailwind CSS

Tag Managers

1
Google Tag Manager

CDN

1
Cloudflare

SEO Analysis

C62/100
19
7
2
Meta Tags4/15
Content12/12
Headings3/8
Technical17/25
E-E-A-T3/7
Images5/7
Links5/5
URL5/5
Social1/5
Freshness0/4
Mobile4/4
Indexability3/3
C
clingendael.orgclingendael.org

Home | Clingendael

No description available for this page.

Title Length18 chars

Recommended: 50-60 chars (~105px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

  • • Missing meta description — important for click-through rates in SERPs
  • • Missing H1 tag — every page should have exactly one H1

9 issues found

Upgrade to view details

Crawlability

Sitemap
robots.txt

63 rules

Sitemap reference found

Local SEO

Local Search Readiness

22/100
Needs Work
6 9 2

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AI & LLM Readiness

D45/100
Bot Access
20/25
Machine Read.
10/25
Schema Data
0/25
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
navheader/footer
Text ratio:7%
Words:705
Token eff.:Optimal
Sections/1K:39.7
Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary38w
Descriptive Headingsavg 5.8w
Canonical URL
Open Graph0/3
Twitter Card2/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (8)
AI readiness recommendation preview...
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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.
A
81/100
13
Passed
2
Critical
1
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
13/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
10/15
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
13/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
10/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
2 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.
80/100
A+
1 mg
CO₂e / view
14.0 KB
Page Weight
95%
Cleaner Than
New Visitor
2 mg
vs
Returning (cached)
<0.001 g
Annual (10K/mo)
168 g
Emission Segments
Data Center
<0.001 g
Network
<0.001 g
Device
<0.001 g
Resource Breakdown
HTML
11.7 KB
Other
2.2 KB
Green Hosting Verified
Cloudflare
GWF Verified
2 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
A

Security Score

86%Very Good
Interactive

HTTPS

WAF

86d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

24.04.2026

Valid Until

23.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

clingendael.org*.clingendael.org

SHA-256 Fingerprint

3C:22:11:7E:64:4C:A0:CC:91:59:C8:C8:ED:AB:6D:01:22:6D:F1:47...

Upgrade to view header details

HTTP Headers

Developer Console

cache-control
🟡 900s(max-age=900, public)
cf-cache-status
DYNAMIC
cf-ray🇮🇹 Milan
9f30fc4d3bbfedac-MXP
content-encoding
⚡ Brotli(br)
content-language
en
content-security-policy
report-uri /report-csp-violation
Good Warning Issue

Email Infrastructure

Barracuda

Score

100

SPF
DKIM
DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

d307270.a.ess.de.barracudanetworks.com
d307270.b.ess.de.barracudanetworks.com

Domain Information

clingendael.org

Domain Age
25y 11m

Created

19.05.2000

Expires

19.05.2026

Last Updated

24.11.2025

Registrar

Key-Systems GmbH

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
Privacy policy page linked

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.
C
63/100
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

Source Serif 4 + Source Sans 3

WCAG Partial
61/100
Readability
/30
27/30

16px · LH 1.40

Hierarchy
/20
7/20
WCAG
/25
12/25

1:1 min contrast

Performance
/25
15/25

2 fonts · 2 req

Heading Font

Source Serif 4

Serif

Body Font

Source Sans 3

Sans16px

Contrast Ratio

1:1

18 issues

Reading Comfort

~35 CPL

Narrow lines
32px
h2
36px
h3
16px
p
Major Second
Scale

✅ Excellent readability: 16px body text is ideal for all devices.

✅ Optimal line spacing: 1.40 ratio (ideal range 1.4–1.6).

⚠️ Partial contrast: 18 elements below WCAG AA threshold (min 1.0:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

❌ Pure vw font sizes: Viewport units alone break browser zoom (WCAG 1.4.4 fail). Use clamp(rem, vw, rem).

✅ Lean font stack: 2 font families keeps load times fast.

Buy on MyFonts

Color Palette

11 unique colors
11.42:1 AAA Light
#ffffff
Background· 71.7%
#403837
Secondary· 2.7%
#040d18
Accent· 5%
#165aa8
Primary· 3.3%
#cfc8c1
Secondary· 3.3%
#147ac2
Accent· 2.9%
#e4eaea
Border· 2.7%
#86b2c7
Secondary· 2.5%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

2
Google Tag ManagerFree
Google AnalyticsFree

User behavior and product analytics

1

Categories

2

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

14 Resources

12
Scripts
2
Styles
2
Async
1
Defer

Top Script Sources

local(5)cdnjs.cloudflare.com(4)googletagmanager.com(2)static.cloudflareinsights.com(1)

Website Identity

clingendael.org

info@clingendael.org
(+31)70-324 53 84
25 years old
Location detected: 🇳🇱 Netherlandsvia phone
Key-Systems GmbH📧 Barracudaen

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Last analyzed: 27 Apr 2026 at 21:41

Historical Analysis & Change Tracking