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gfz-potsdam.de

https://gfz-potsdam.de· First analyzed 25 Apr 2026· Updated 25 Apr 2026
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gfz-potsdam.de
Desktop screenshot of gfz-potsdam.de
Mobile screenshot of gfz-potsdam.de
Mobile

Sponsored

Hosting Provider

Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum GFZ

IP Address

139.17.229.15

Site Location

🇩🇪 Germanyvia tld

Server Location

🇩🇪 Berlin, Germany

ASN

AS680

Organization

Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum GFZ

Server

Apache

Nameservers

zrt7b.gfz-potsdam.de.ns.tu-berlin.de.

Performance

96

Core Web Vitals

Weight

First Contentful Paint
1.1 s10%
Speed Index
1.4 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
940 KB
35 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
TYPO3

Technology Stack

4 Technologies Detected

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

Analytics

1
Matomo

Web Servers

1
Apachev2.4.58

SEO Analysis

A80/100
25
7
0
Meta Tags7/15
Content12/12
Headings8/8
Technical23/25
E-E-A-T3/7
Images5/7
Links5/5
URL5/5
Social3/5
Freshness2/4
Mobile4/4
Indexability3/3
G
gfz-potsdam.degfz-potsdam.de

Startseite: GFZ

Das GFZ Helmholtz-Zentrum für Geoforschung ist das nationale Zentrum für die Erforschung der festen Erde. Wir untersuchen die Geosphäre im hochkomplexen Syst...

Description truncated.
Title Length15 chars

Recommended: 50-60 chars (~91px / 580px)

Description Length282 chars

Recommended: 120-160 chars

Issues (0)

    7 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: index

    3 URLs

    3 sub-sitemaps

    robots.txt

    11 rules

    Sitemap reference found

    Local SEO

    Local Search Readiness

    12/100
    Poor
    4 12 2

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

    Sponsored

    AI & LLM Readiness

    D50/100
    Bot Access
    20/25
    Machine Read.
    11/25
    Schema Data
    3/25
    Citation
    16/25

    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
    nav
    Text ratio:7%
    Words:909
    Token eff.:Optimal
    Sections/1K:22
    Depth:1/5

    Structured Data

    Microdata
    Article×1.2microdata

    Citation Readiness

    Opening Summary284w
    Descriptive Headingsavg 4.3w
    Canonical URL
    Open Graph2/3
    Twitter Card1/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (10)
    AI readiness recommendation preview...
    Upgrade to view recommendations

    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
    89/100
    15
    Passed
    1
    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
    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
    13/15
    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.
    59/100
    B
    116 mg
    CO₂e / view
    940.4 KB
    Page Weight
    80%
    Cleaner Than
    New Visitor
    133 mg
    vs
    Returning (cached)
    67 mg
    Annual (10K/mo)
    14.0 kg
    Emission Segments
    Data Center
    26 mg
    Network
    28 mg
    Device
    62 mg
    Resource Breakdown
    JavaScript
    82.6 KB
    Images
    356.2 KB
    CSS
    486.7 KB
    HTML
    15.0 KB
    Green Hosting Not Verified
    Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum GFZ
    3 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    F

    Security Score

    31%Critical
    Interactive

    HTTPS

    No WAF

    309d

    Certificate Details

    Type

    Organization Validated (OV)

    Certificate Authority

    Hellenic Academic and Research Institutions CA

    Key Algorithm

    ECDSA (secp256r1) (256 bit)

    Signature

    ECDSA with SHA-384

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2

    Valid From

    01.03.2026

    Valid Until

    01.03.2027

    OCSP Stapling

    Enabled

    Subject Alternative Names (10)

    www.gfz-potsdam.dewww-prod1.gfz-potsdam.dewww-prod2.gfz-potsdam.dewww-prod3.gfz-potsdam.degfz.dewww.gfz.dewww-prod5.gfz.dewww-prod6.gfz.de+2 more

    SHA-256 Fingerprint

    71:4D:ED:B4:FC:2B:F2:83:67:D1:23:5A:7A:81:43:5D:53:F9:B9:F0...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    cache-control
    🟡 1 Hours(max-age=4849)
    content-encoding
    📦 Gzip(gzip)
    content-language
    de-DE
    content-length
    15014
    content-type
    text/html; charset=utf-8
    date
    Sat, 25 Apr 2026 20:39:11 GMT
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    68

    SPF
    DKIM
    DMARC

    DMARC Policy

    Quarantine (Moderate)

    MX Records (3)

    a1791.mx.srv.dfn.de
    b1791.mx.srv.dfn.de
    c1791.mx.srv.dfn.de

    Domain Information

    gfz-potsdam.de

    Last Updated

    15.01.2025

    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

    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
    58/100
    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
    2 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Inter Tight + Inter

    WCAG Partial
    64/100
    Readability
    /30
    22/30

    16px · LH 1.60

    Hierarchy
    /20
    16/20

    2.25x ratio · ✓ H1→H6

    WCAG
    /25
    17/25

    1:1 min contrast

    Performance
    /25
    9/25

    2 fonts · 9 req

    Heading Font

    Inter Tight

    Sans36px

    Body Font

    Inter

    Sans16px

    Contrast Ratio

    1:1

    9 issues

    Reading Comfort

    ~40 CPL

    Narrow lines
    36px
    h1
    30px
    h2
    24px
    h3
    14px
    h4
    16px
    p

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

    ✅ Optimal line spacing: 1.60 ratio (ideal range 1.4–1.6).

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

    ⚠️ 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 2.2x larger than body text.

    Buy on MyFontsFluid Type (rem)Flesch 0

    Color Palette

    10 unique colors
    13.83:1 AAA Light
    #ffffff
    Background· 27.600000000000005%
    #292e2a
    Other· 6.8%
    #062d67
    Primary· 22.3%
    #334e6d
    Primary· 11.899999999999999%
    #fa6c35
    Accent· 7.5%
    #f2f1ef
    Secondary· 6.1%
    #76593f
    Secondary· 5%
    #0e1c22
    Secondary· 4.1%

    Business & Marketing Stack

    1 Tools Detected

    Growing

    Behavior Analytics

    1
    Google AnalyticsFree

    User behavior and product analytics

    1

    Categories

    1

    Total Tools

    0

    Enterprise

    0

    Mid-Market

    Assessment: Growing marketing technology adoption

    Sponsored

    Scripts & Styles

    4 Resources

    1
    Scripts
    3
    Styles
    0
    Async
    0
    Defer

    Top Script Sources

    local(1)

    Website Identity

    gfz-potsdam.de

    info@example.com
    Location detected: 🇩🇪 Germanyvia tld
    de

    Sponsored

    Last analyzed: 25 Apr 2026 at 20:39

    Historical Analysis & Change Tracking