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clean-aviation.eu

https://clean-aviation.eu· First analyzed 01 Jun 2026· Updated 01 Jun 2026
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clean-aviation.eu
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Mobile

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Hosting Provider

Level27 BRU1

IP Address

185.3.217.140

Site Location

🇧🇪 Brussels, Belgiumvia ip

Server Location

🇧🇪 Nazareth, Belgium

ASN

AS59943

Organization

Level27 BRU1

CDN

CDN

Nameservers

ns2-33.azure-dns.net.ns3-33.azure-dns.org.ns4-33.azure-dns.info.ns1-33.azure-dns.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
678 ms10%
Speed Index
881 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.2 MB
58 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Drupal

Technology Stack

8 Technologies Detected

UI Components

2
SwiperFancybox

Libraries

1
jQuery

Other

1
GSAPv3.13.0

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

Fonts

1
Google Fonts

Analytics

1
Matomo

SEO Analysis

C68/100
21
7
1
Meta Tags9/15
Content10/12
Headings8/8
Technical20/25
E-E-A-T0/7
Images4/7
Links5/5
URL5/5
Social1/5
Freshness0/4
Mobile3/4
Indexability3/3
C
clean-aviation.euclean-aviation.eu

Home | Clean Aviation

Clean Aviation Joint Undertaking is the European Union’s leading research and innovation programme for transforming aviation towards a sustainable future.

Title Length21 chars

Recommended: 50-60 chars (~124px / 580px)

Description Length154 chars

Recommended: 120-160 chars

Issues (1)

  • • Most images missing alt text (12/19) — critical for accessibility and SEO

8 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

1,899 URLs

robots.txt

56 rules

Local SEO

Local Search Readiness

15/100
Poor
4 14 2

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

D42/100
Bot Access
20/25
Machine Read.
7/25
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
Text ratio:5%
Words:1,552
Token eff.:Optimal

Structured Data

No Schema

Citation Readiness

Opening Summary139w
Descriptive Headingsavg 8.6w
Canonical URL
Open Graph1/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (10)
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+
94/100
16
Passed
0
Critical
0
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
20/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
15/15
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
15/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
9/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

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.
51/100
C
154 mg
CO₂e / view
1.2 MB
Page Weight
70%
Cleaner Than
New Visitor
176 mg
vs
Returning (cached)
88 mg
Annual (10K/mo)
18.5 kg
Emission Segments
Data Center
34 mg
Network
37 mg
Device
83 mg
Resource Breakdown
JavaScript
232.4 KB
Images
608.1 KB
CSS
236.0 KB
Fonts
156.1 KB
HTML
12.9 KB
Green Hosting Not Verified
Level27 BRU1
6 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
D

Security Score

56%Poor
Interactive

HTTPS

No WAF

144d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

GlobalSign nv-sa

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

08.04.2026

Valid Until

24.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.clean-aviation.euclean-aviation.eu

SHA-256 Fingerprint

90:28:9B:B6:A5:27:89:13:01:BE:FA:33:A0:E0:C2:AA:43:78:B8:D5...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges
bytes
age
264764
cache-control
🟡 60s(max-age=60, public, s-maxage=31536000, stale-if-error=3600, ...)
content-encoding
📦 Gzip(gzip)
content-language
en
content-length
12914
Good Warning Issue

Email Infrastructure

Microsoft 365

Score

90

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

cleanaviation-eu01c.mail.protection.outlook.com

Domain Information

clean-aviation.eu

DNSSEC
Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner
Cookiebot
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
CMP: Cookiebot
Privacy policy page linked
Legitimate interest basis mentioned

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.
B
78/100
Mobile Friendly24 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.
Viewport
width=device-width, initial-scale=1.0
1 recommendation
  • •Mobile compatibility recommendation preview...
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Typography & Readability

Open Sans

WCAG Partial
74/100
Readability
/30
22/30

18px · LH 1.80

Hierarchy
/20
19/20

2.56x ratio · ✓ H1→H6

WCAG
/25
13/25

1:1 min contrast

Performance
/25
20/25

1 font · 3 req

Heading Font

Open Sans

Sans46px

Body Font

Open Sans

Sans18px

Contrast Ratio

1:1

9 issues

Reading Comfort

~38 CPL

Narrow lines
46px
h1
80px
h2
18px
p
Major Sixth
Scale

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

⚠️ Hard to read: Flesch score 48/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 9 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 2.6x larger than body text.

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

GGoogle FontsFlesch 49

Color Palette

9 unique colors
19.05:1 AAA Light
#ffffff
Background· 58.800000000000004%
#120f11
Text· 6.4%
#4b427b
Secondary· 16.4%
#082dcc
Primary· 4.5%
#8f9cb0
Secondary· 4.3%
#594166
Secondary· 3.7%
#d0d7da
Secondary· 3.1%
#646780
Secondary· 2.2%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

1
CookiebotMid-Market

Cookie consent and privacy compliance tools

2

Categories

2

Total Tools

0

Enterprise

1

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

25 Resources

19
Scripts
6
Styles
5
Async
6
Defer

Top Script Sources

local(10)matomo.paddle.be(3)cdn.jsdelivr.net(3)consent.cookiebot.com(2)consentcdn.cookiebot.com(1)

Website Identity

clean-aviation.eu

Location detected: 🇧🇪 Belgium, Brusselsvia ip
📧 Microsoft 365en

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Last analyzed: 01 Jun 2026 at 15:34

Historical Analysis & Change Tracking