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cessda.eu

https://cessda.eu· First analyzed 27 May 2026· Updated 27 May 2026
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cessda.eu
Desktop screenshot of cessda.eu
Mobile screenshot of cessda.eu
Mobile

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Hosting Provider

Host Europe GmbH

IP Address

92.205.162.150

Site Location

🇫🇷 Francevia ip

Server Location

🇫🇷 Strasbourg, France

ASN

AS21499

Organization

Host Europe GmbH

Server

Nginx

Nameservers

ns1.hyp.net.ns3.hyp.net.ns2.hyp.net.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
492 ms10%
Speed Index
640 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
592 KB
25 requests

Image Optimization

Lazy LoadWebPAVIFResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Tailwind CSS
Infrastructure
Hosting
Host Europe GmbH

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

4 Technologies Detected

Other

1
lazysizes

CSS Frameworks

1
Tailwind CSS

Analytics

1
Matomo

Web Servers

1
Nginx

SEO Analysis

C69/100
20
7
0
Meta Tags13/15
Content11/12
Headings6/8
Technical15/25
E-E-A-T0/7
Images7/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
C
cessda.eucessda.eu

CESSDA - Consortium of European Social Science Data Archives

CESSDA consolidates and strengthens European social science research by providing digital research tools, building trust and standards and developing and wid...

Description truncated.
Title Length60 chars

Recommended: 50-60 chars (~363px / 580px)

Description Length210 chars

Recommended: 120-160 chars

Issues (0)

    7 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: index

    1 URLs

    1 sub-sitemaps

    robots.txt

    2 rules

    Allows all crawlers

    Local SEO

    Local Search Readiness

    5/100
    Poor
    2 13 2

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

    Sponsored

    AI & LLM Readiness

    D45/100
    Bot Access
    20/25
    Machine Read.
    13/25
    Schema Data
    0/25
    Citation
    12/25

    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:657
    Token eff.:Optimal
    Sections/1K:15.2
    Depth:2/5

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary123w
    Descriptive Headingsavg 6.6w
    Canonical URL
    Open Graph0/3
    Twitter Card0/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (7)
    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.
    A
    83/100
    12
    Passed
    2
    Critical
    0
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    18/20
    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
    9/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    6/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    1 recommendation
    • •Accessibility recommendation preview...
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    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.
    58/100
    A
    73 mg
    CO₂e / view
    592.4 KB
    Page Weight
    80%
    Cleaner Than
    New Visitor
    84 mg
    vs
    Returning (cached)
    42 mg
    Annual (10K/mo)
    8.8 kg
    Emission Segments
    Data Center
    16 mg
    Network
    18 mg
    Device
    39 mg
    Resource Breakdown
    JavaScript
    26.4 KB
    Images
    38.9 KB
    CSS
    511.9 KB
    HTML
    15.2 KB
    Green Hosting Not Verified
    Host Europe GmbH
    5 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    A

    Security Score

    86%Very Good
    Static / Informational

    HTTPS

    No WAF

    72d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Let's Encrypt

    Key Algorithm

    ECDSA (secp256r1) (256 bit)

    Signature

    ECDSA with SHA-384

    TLS Version

    TLSv1.2

    HTTP Protocol

    HTTP/2

    Valid From

    10.05.2026

    Valid Until

    08.08.2026

    Subject Alternative Names (2)

    cessda.euwww.cessda.eu

    SHA-256 Fingerprint

    F7:66:9F:F5:F8:4F:32:B5:97:08:4A:B0:51:04:7D:C8:D0:A1:13:EC...

    Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    age
    2420
    cache-control
    🔴 No Cache(no-cache, private)
    content-encoding
    📦 Gzip(gzip)
    content-language
    en
    content-security-policy
    frame-ancestors 'self'
    content-type
    text/html; charset=UTF-8
    Good Warning Issue

    Email Infrastructure

    Google Workspace

    Score

    65

    SPF
    DKIM
    DMARC

    DMARC Policy

    None (Monitor Only)

    MX Records (5)

    ASPMX.L.GOOGLE.COM
    ALT2.ASPMX.L.GOOGLE.COM
    ALT1.ASPMX.L.GOOGLE.COM
    ALT4.ASPMX.L.GOOGLE.COM

    +1 more

    Domain Information

    cessda.eu

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Cookie Consent Banner
    Privacy Policy
    Terms of Service

    GDPR Indicators

    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.
    B
    75/100
    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, shrink-to-fit=no
    1 recommendation
    • •Mobile compatibility recommendation preview...
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    Typography & Readability

    InterWeb

    WCAG Partial
    70/100
    Readability
    /30
    26/30

    16px · LH 1.50

    Hierarchy
    /20
    14/20

    2.6x ratio

    WCAG
    /25
    12/25

    1:1 min contrast

    Performance
    /25
    18/25

    1 font · 4 req

    Heading Font

    InterWeb

    Sans42px

    Body Font

    InterWeb

    Sans16px

    Contrast Ratio

    1:1

    8 issues

    Reading Comfort

    ~40 CPL

    Narrow lines
    42px
    h1
    19px
    h2
    16px
    p

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

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

    ❌ Very complex text: Flesch score 26/100. Consider shorter sentences and simpler words.

    ⚠️ Partial contrast: 8 elements below WCAG AA threshold (min 1.0:1).

    ⚠️ Minor heading issue: 0 level skip(s) detected. Maintain sequential order for screen readers.

    ✅ Strong hierarchy: Headlines are 2.6x larger than body text.

    Buy on MyFontsFlesch 26

    Color Palette

    12 unique colors
    Light
    #ffffff
    Primary· 30.1%
    #37323e
    Secondary· 16.8%
    #252128
    Text· 8.4%
    #791e54
    Accent· 7.8%
    #0a4e7c
    Accent· 7.1%
    #09070a
    Secondary· 5.7%
    #848a9a
    Secondary· 4.9%
    #4d394c
    Secondary· 4.4%

    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

    Sponsored

    Scripts & Styles

    10 Resources

    7
    Scripts
    3
    Styles
    4
    Async
    0
    Defer

    Top Script Sources

    youtube.com(2)local(2)cdn.matomo.cloud(1)static.mailerlite.com(1)app.mailerlite.com(1)

    Website Identity

    cessda.eu

    [email protected]
    Location detected: 🇫🇷 Francevia ip
    📧 Google Workspaceen

    Social Profiles

    LinkedInYouTubeBluesky

    Sponsored

    Last analyzed: 27 May 2026 at 21:09

    Historical Analysis & Change Tracking

    cessda.eu Technology Stack - Built With lazysizes, Tailwind CSS, Matomo, Nginx | StackOptic | StackOptic