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clarkefoundation.org

https://clarkefoundation.org· First analyzed 28 May 2026· Updated 28 May 2026
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clarkefoundation.org
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Mobile

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Hosting Provider

godaddy.com

IP Address

192.169.170.16

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Tempe, United States

ASN

AS398101

Organization

GoDaddy.com, LLC

Server

Apache

Nameservers

ns58.domaincontrol.com.ns57.domaincontrol.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
648 ms10%
Speed Index
842 ms10%
Largest Contentful Paint
25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
7.3 MB
51 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
WordPressv6.1.10
cms
Diviv4.27.6Custom
by Elegant Themes
View Theme

SEO Analysis

B74/100
21
8
2
Meta Tags9/15
Content10/12
Headings8/8
Technical24/25
E-E-A-T0/7
Images3/7
Links2/5
URL5/5
Social3/5
Freshness4/4
Mobile3/4
Indexability3/3
C
clarkefoundation.orgclarkefoundation.org

The Arthur C Clarke Foundation - The Arthur C Clarke Foundation

No description available for this page.

Title Length63 chars

Recommended: 50-60 chars (~381px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

  • Missing meta description — important for click-through rates in SERPs
  • Most images missing alt text (40/42) — critical for accessibility and SEO

Crawlability

Sitemap

Type: index

5 URLs

5 sub-sitemaps

robots.txt

5 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

15/100
Poor
5 11 1

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

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AI & LLM Readiness

D44/100
Bot Access
20/25
Machine Read.
7/25
Schema Data
4/25
Citation
13/25

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
Text ratio:3%
Words:861
Token eff.:Optimal

Structured Data

3 JSON-LD
WebSiteBreadcrumbListSearchAction

Citation Readiness

Opening Summary38w
Descriptive Headingsavg 4.8w
Canonical URL
Open Graph1/3
Twitter Card1/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (11)
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.
B
77/100
12
Passed
3
Critical
1
Warnings
Images & Alt Text
20/20
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
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
11/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
4/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
2 recommendations
  • Accessibility recommendation preview...

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.
27/100
F
924 mg
CO₂e / view
7.3 MB
Page Weight
5%
Cleaner Than
New Visitor
1.06 g
vs
Returning (cached)
528 mg
Annual (10K/mo)
110.8 kg
Emission Segments
Data Center
206 mg
Network
222 mg
Device
496 mg
Resource Breakdown
JavaScript
224.9 KB
Images
6.9 MB
CSS
147.8 KB
Fonts
5.8 KB
HTML
34.1 KB
Green Hosting Not Verified
GoDaddy
6 recommendations
  • Carbon footprint recommendation preview...
F

Security Score

21%Critical
Interactive

HTTPS

No WAF

63d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

02.05.2026

Valid Until

31.07.2026

Subject Alternative Names (2)

clarkefoundation.orgwww.clarkefoundation.org

SHA-256 Fingerprint

93:C9:CE:13:1F:83:29:50:09:E4:A9:BE:73:F6:13:85:65:09:73:86...

Top Recommendations

Security recommendation preview

HTTP Headers

Developer Console

cache-control
🔴 No Cache(no-cache, must-revalidate, max-age=0)
content-encoding
📦 Gzip(gzip)
content-length
34663
content-type
text/html; charset=UTF-8
date
Thu, 28 May 2026 23:48:32 GMT
expires
Wed, 11 Jan 1984 05:00:00 GMT
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

0

SPF
DKIM
DMARC

Domain Information

clarkefoundation.org

Domain Age
22y 5m

Created

11.12.2003

Expires

11.12.2026

Last Updated

25.01.2026

Registrar

GoDaddy.com, LLC

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

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.
D
56/100
Not Mobile Friendly53 breakpoints
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.
3 recommendations
  • Mobile compatibility recommendation preview...

Typography & Readability

Helvetica + Arial

WCAG Partial
62/100
Readability
/30
20/30

16px · LH 1.70

Hierarchy
/20
14/20

2.25x ratio · ✓ H1→H6

WCAG
/25
16/25

1:1 min contrast

Performance
/25
12/25

System fonts

Heading Font

Helvetica

Sans36px

Body Font

Arial

Sans16px

Contrast Ratio

1:1

2 issues

Reading Comfort

~37 CPL

Narrow lines
36px
h1
42px
h2
26px
h3
22px
h4
16px
p

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

⚠️ Hard to read: Flesch score 42/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 2 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 2.2x larger than body text.

✅ System fonts: Zero font loading delay — best possible LCP impact.

Color Palette

9 unique colors
4.02:1 AA Large Light
#ffffff
Background· 62.1%
#7b7f87
Other· 4%
#0b0909
Primary· 18.7%
#bdae9d
Secondary· 3.3%
#7f3078
Secondary· 3.1%
#e3f2f0
Secondary· 2.1%
#69a0ba
Secondary· 1.9%
#181d28
Secondary· 1.6%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

1

User behavior and product analytics

1

Categories

1

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

30 Resources

20
Scripts
10
Styles
3
Async
0
Defer

Top Script Sources

clarkefoundation.org(17)googletagmanager.com(2)google-analytics.com(1)

Website Identity

The Arthur C Clarke Foundation - The Arthur C Clarke Foundation

Unleashing imagination to shape the future

Location detected: 🇺🇸 United Statesvia ip
GoDaddy.com, LLCen

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Last analyzed: 28 May 2026 at 23:48

Historical Analysis & Change Tracking