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esa.nl

https://esa.nl· First analyzed 13 May 2026· Updated 13 May 2026
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esa.nl
Desktop screenshot of esa.nl
Mobile screenshot of esa.nl
Mobile

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Hosting Provider

OVHcloud
ovhcloud.com

IP Address

178.32.232.86

Site Location

🇳🇱 Netherlandsvia tld

Server Location

🇫🇷 Montpellier, France

ASN

AS16276

Organization

Saggiorato David

CDN

Fastly

Nameservers

ns1.esa.int.ns2.esa.int.ns3.esa.int.ns4.esa.int.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
650 ms10%
Speed Index
845 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
10.1 MB
57 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
OVHcloud
CDN
Fastly

Technology Stack

4 Technologies Detected

Libraries

1
jQueryv2.2.4

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

Analytics

1
Matomo

SEO Analysis

D55/100
15
9
1
Meta Tags4/15
Content11/12
Headings8/8
Technical12/25
E-E-A-T0/7
Images2/7
Links5/5
URL5/5
Social1/5
Freshness0/4
Mobile4/4
Indexability3/3
E
esa.nlesa.nl

ESA - The Netherlands

No description available for this page.

Title Length21 chars

Recommended: 50-60 chars (~128px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

  • • Missing meta description — important for click-through rates in SERPs

10 issues found

Upgrade to view details

Crawlability

Sitemap
robots.txt

41 rules

Local SEO

Local Search Readiness

6/100
Poor
2 13 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

D41/100
Bot Access
20/25
Machine Read.
12/25
Schema Data
0/25
Citation
9/25

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:9%
Words:744
Token eff.:Optimal
Sections/1K:72.6

Structured Data

No Schema

Citation Readiness

Opening Summary
Descriptive Headingsavg 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...
Upgrade to view recommendations

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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.
C
65/100
8
Passed
3
Critical
2
Warnings
Images & Alt Text
15/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
16/20
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
9/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
0/15
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.
33/100
F
1.04 g
CO₂e / view
10.1 MB
Page Weight
5%
Cleaner Than
New Visitor
1.19 g
vs
Returning (cached)
596 mg
Annual (10K/mo)
125.1 kg
Emission Segments
Data Center
51 mg
Network
306 mg
Device
685 mg
Resource Breakdown
JavaScript
35.7 KB
Images
9.8 MB
CSS
247.6 KB
HTML
8.4 KB
Green Hosting Verified
OVHcloud
GWF Verified
5 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

36%Critical
Interactive

HTTPS

No WAF

174d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

03.11.2025

Valid Until

03.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

www.esa.int

SHA-256 Fingerprint

BA:E3:D3:8B:B1:85:B9:7B:DE:5B:25:5B:56:E5:05:1D:8B:3D:94:2E...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges
bytes
age
2
cache-control
🟡 600s(max-age=600)
content-encoding
📦 Gzip(gzip)
content-language
en-GB
content-length
8347
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

0

SPF
DKIM
DMARC

Domain Information

esa.nl

Domain Age
34y 5m

Created

17.12.1991

Last Updated

09.10.2025

Registrar

SURF B.V.

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.
D
52/100
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, user-scalable=no, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0
3 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

NotesESAbold + Arial

WCAG Partial
78/100
Readability
/30
20/30

14px · LH 1.50

Hierarchy
/20
20/20

9.14x ratio · ✓ H1→H6

WCAG
/25
17/25

1:1 min contrast

Performance
/25
21/25

System fonts

Heading Font

NotesESAbold

Sans128px

Body Font

Arial

Sans14px

Contrast Ratio

1:1

23 issues

Reading Comfort

Dual Sans-Serif

left aligned
128px
h1
75px
h2
36px
h3
14px
p

⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

❌ Very complex text: Flesch score 0/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 23 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 9.1x larger than body text.

Buy on MyFontsFlesch 0

Color Palette

5 unique colors
Light
#e8e9e4
Secondary· 44.50000000000001%
#345b6d
Primary· 25.5%
#144156
Accent· 18.499999999999996%
#043146
Primary· 9.3%
#8ba0a8
Secondary· 2.1%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

2
Matomo (Piwik)Mid-Market
Google AnalyticsFree

User behavior and product analytics

1

Categories

2

Total Tools

0

Enterprise

1

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

7 Resources

3
Scripts
4
Styles
1
Async
0
Defer

Top Script Sources

www-analytics.esa.int(1)code.jquery.com(1)local(1)

Website Identity

esa.nl

34 years old
Location detected: 🇳🇱 Netherlandsvia tld
SURF B.V.en

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Last analyzed: 13 May 2026 at 07:26

Historical Analysis & Change Tracking