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fiz-karlsruhe.de

https://fiz-karlsruhe.de· First analyzed 06 May 2026· Updated 06 May 2026
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fiz-karlsruhe.de
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Mobile

Sponsored

Hosting Provider

FIZ Karlsruhe - Leibniz Institute Information Infrastructure

IP Address

141.66.193.58

Site Location

🇩🇪 Germanyvia tld

Server Location

🇩🇪 Eggenstein-Leopoldshafen, Germany

ASN

AS13040

Organization

FIZ Karlsruhe - Leibniz Institute Information Infrastructure

Server

Apache

Nameservers

dns-3.dfn.de.dns1.fiz-karlsruhe.de.dns2.fiz-karlsruhe.de.

Performance

90

Core Web Vitals

Weight

First Contentful Paint
1.5 s10%
Speed Index
1.9 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.8 MB
37 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Drupal

Technology Stack

4 Technologies Detected

CSS Frameworks

1
Tailwind CSS

Analytics

1
Matomo

Web Servers

1
Apachev2.4.37

Languages

1
PHPv8.4.20

SEO Analysis

C68/100
21
7
0
Meta Tags9/15
Content9/12
Headings8/8
Technical20/25
E-E-A-T0/7
Images3/7
Links5/5
URL5/5
Social0/5
Freshness2/4
Mobile4/4
Indexability3/3
F
fiz-karlsruhe.defiz-karlsruhe.de

Startseite | FIZ Karlsruhe

FIZ Karlsruhe – Leibniz-Institut für Informationsinfrastruktur ist eine der großen Informationsinfrastruktureinrichtung in Deutschland

Title Length26 chars

Recommended: 50-60 chars (~152px / 580px)

Description Length134 chars

Recommended: 120-160 chars

Issues (0)

    7 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: index

    1,050 URLs

    1050 sub-sitemaps

    robots.txt

    56 rules

    Local SEO

    Local Search Readiness

    7/100
    Poor
    2 14 2

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

    Sponsored

    AI & LLM Readiness

    D42/100
    Bot Access
    20/25
    Machine Read.
    11/25
    Schema Data
    0/25
    Citation
    11/25

    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:5%
    Words:414
    Token eff.:Optimal
    Sections/1K:9.7
    Depth:2/5

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary19w
    Descriptive Headingsavg 2w
    Canonical URL
    Open Graph0/3
    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

    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
    85/100
    13
    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
    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
    9/15
    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.
    1 recommendation
    • •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.
    39/100
    D
    224 mg
    CO₂e / view
    1.8 MB
    Page Weight
    60%
    Cleaner Than
    New Visitor
    256 mg
    vs
    Returning (cached)
    128 mg
    Annual (10K/mo)
    26.9 kg
    Emission Segments
    Data Center
    50 mg
    Network
    54 mg
    Device
    120 mg
    Resource Breakdown
    JavaScript
    513.6 KB
    Images
    671.8 KB
    CSS
    557.3 KB
    HTML
    68.0 KB
    Green Hosting Not Verified
    FIZ Karlsruhe - Leibniz Institute Information Infrastructure
    6 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    D

    Security Score

    56%Poor
    Interactive

    HTTPS

    No WAF

    120d

    Certificate Details

    Type

    Organization Validated (OV)

    Certificate Authority

    Hellenic Academic and Research Institutions CA

    Key Algorithm

    ECDSA (secp384r1) (384 bit)

    Signature

    ECDSA with SHA-384

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/1.1

    Valid From

    03.09.2025

    Valid Until

    03.09.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (2)

    *.fiz-karlsruhe.defiz-karlsruhe.de

    SHA-256 Fingerprint

    AD:2F:D2:E4:46:5E:F8:A7:BF:C4:64:FF:6E:39:4D:30:CF:65:6A:75...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    cache-control
    🔴 No Cache(must-revalidate, no-cache, private)
    connection
    Keep-Alive
    content-length
    69292
    content-type
    text/html; charset=UTF-8
    content-language
    de
    date
    Wed, 06 May 2026 08:18:39 GMT
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    50

    SPF
    DKIM
    DMARC

    MX Records (2)

    mailgate2.fiz-karlsruhe.de
    mailgw.fiz-karlsruhe.de

    Domain Information

    fiz-karlsruhe.de

    Last Updated

    19.05.2025

    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.
    C
    69/100
    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=1.0
    1 recommendation
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    MetaOT-Book

    WCAG Partial
    76/100
    Readability
    /30
    24/30

    24px · LH 1.46

    Hierarchy
    /20
    15/20

    1.5x ratio · ✓ H1→H6

    WCAG
    /25
    17/25

    4.48:1 min contrast

    Performance
    /25
    20/25

    1 font · 1 req

    Heading Font

    MetaOT-Book

    Sans36px

    Body Font

    MetaOT-Book

    Sans24px

    Contrast Ratio

    4.48:1

    4 issues

    Reading Comfort

    ~35 CPL

    Narrow lines
    36px
    h1
    36px
    h2
    24px
    p
    Minor Second
    Scale

    ✅ Excellent readability: 24px body text is ideal for all devices.

    ✅ Optimal line spacing: 1.46 ratio (ideal range 1.4–1.6).

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

    ⚠️ Partial contrast: 4 elements below WCAG AA threshold (min 4.5:1).

    ✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

    ✅ Lean font stack: 1 font families keeps load times fast.

    Buy on MyFontsFlesch 0

    Color Palette

    7 unique colors
    13.74:1 AAA Light
    #ffffff
    Background· 53.99999999999999%
    #2e2d2c
    Other· 5.3%
    #82926f
    Primary· 6.4%
    #704858
    Secondary· 5.8%

    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

    8 Resources

    5
    Scripts
    3
    Styles
    1
    Async
    3
    Defer

    Top Script Sources

    local(4)partners.fiz-karlsruhe.de(1)

    Website Identity

    fiz-karlsruhe.de

    Location detected: 🇩🇪 Germanyvia tld
    de

    Sponsored

    Last analyzed: 06 May 2026 at 08:18

    Historical Analysis & Change Tracking