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stadt-koeln.de

https://stadt-koeln.de· First analyzed 25 Apr 2026· Updated 25 Apr 2026
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stadt-koeln.de
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Mobile

Sponsored

Hosting Provider

NetCologne GmbH

IP Address

87.79.15.140

Site Location

🇩🇪 Köln, Nordrhein-Westfalen, Germanyvia tld

Server Location

🇩🇪 Cologne, Germany

ASN

AS8422

Organization

NetCologne GmbH

Server

Apache

Nameservers

anycast.regdns2.net.anycast.regdns1.de.

Performance

95

Core Web Vitals

Weight

First Contentful Paint
1.2 s10%
Speed Index
1.5 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
4.4 MB
79 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
NetCologne GmbH

Technology Stack

8 Technologies Detected

Libraries

2
jQuery
jQuery UI

CSS Frameworks

2
Tailwind CSS
Bootstrap

UI Components

1
Slick Carousel

Other

1
Modernizr

Analytics

1
Matomo

Web Servers

1
Apache

SEO Analysis

B72/100
22
6
0
Meta Tags9/15
Content10/12
Headings8/8
Technical18/25
E-E-A-T0/7
Images6/7
Links5/5
URL5/5
Social4/5
Freshness0/4
Mobile4/4
Indexability3/3
S
stadt-koeln.destadt-koeln.de

Stadt Köln

Willkommen bei der Stadtverwaltung Köln. Hier finden Sie Ihre Ansprechpersonen, Dienstleistungen und Informationen zu aktuellen Themen.

Title Length10 chars

Recommended: 50-60 chars (~59px / 580px)

Description Length135 chars

Recommended: 120-160 chars

Issues (0)

    6 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: standard

    51,003 URLs

    robots.txt

    6 rules

    Local SEO

    Local Search Readiness

    14/100
    Poor
    4 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

    D43/100
    Bot Access
    20/25
    Machine Read.
    11/25
    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
    nav
    Text ratio:5%
    Words:1,002
    Token eff.:Optimal
    Sections/1K:10
    Depth:1/5

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary588w
    Descriptive Headingsavg 3w
    Canonical URL
    Open Graph2/3
    Twitter Card2/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (11)
    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.
    B
    79/100
    14
    Passed
    2
    Critical
    3
    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
    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
    8/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    3 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
    453 mg
    CO₂e / view
    4.4 MB
    Page Weight
    15%
    Cleaner Than
    New Visitor
    517 mg
    vs
    Returning (cached)
    259 mg
    Annual (10K/mo)
    54.3 kg
    Emission Segments
    Data Center
    22 mg
    Network
    133 mg
    Device
    297 mg
    Resource Breakdown
    JavaScript
    209.8 KB
    Images
    3.6 MB
    CSS
    357.5 KB
    HTML
    23.2 KB
    Other
    199.1 KB
    Green Hosting Verified
    NetCologne GmbH
    GWF Verified
    6 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    F

    Security Score

    26%Critical
    Interactive

    HTTPS

    No WAF

    71d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Let's Encrypt

    Key Algorithm

    RSA (4096 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.3

    Valid From

    07.04.2026

    Valid Until

    06.07.2026

    Subject Alternative Names (4)

    stadt-koeln.dewartung.stadt-koeln.dewww.stadt-koeln.dewww2.stadt-koeln.de

    SHA-256 Fingerprint

    10:1E:CF:87:F0:CF:21:BB:A7:AE:64:19:E5:FC:4D:97:26:60:63:31...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    cache-control
    🔴 No Cache(no-store, no-cache, must-revalidate)
    content-encoding
    📦 Gzip(gzip)
    content-length
    23422
    content-type
    text/html; charset=UTF-8
    date
    Sat, 25 Apr 2026 09:06:28 GMT
    expires
    Thu, 19 Nov 1981 08:52:00 GMT
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    73

    SPF
    DKIM
    DMARC

    DMARC Policy

    Quarantine (Moderate)

    MX Records (2)

    mail2.stadt-koeln.de
    mail1.stadt-koeln.de

    Domain Information

    stadt-koeln.de

    Last Updated

    06.10.2023

    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.
    B
    71/100
    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
    1 recommendation
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    ApproachKoelnSemiBold + ApproachKoelnRegular

    WCAG AA
    63/100
    Readability
    /30
    22/30

    22px · LH 1.30

    Hierarchy
    /20
    16/20

    2.27x ratio · ✓ H1→H6

    WCAG
    /25
    14/25

    4.53:1 min contrast

    Performance
    /25
    11/25

    3 fonts · 3 req

    Heading Font

    ApproachKoelnSemiBold

    Sans50px

    Body Font

    ApproachKoelnRegular

    Sans22px

    Contrast Ratio

    4.53:1

    WCAG AA (≥4.5:1)

    Reading Comfort

    Dual Sans-Serif

    left aligned
    50px
    h1
    50px
    h2
    22px
    p
    Minor Second
    Scale

    ✅ Excellent readability: 22px body text is ideal for all devices.

    ⚠️ Tight line spacing (1.30). Increase to 1.4–1.6 for better readability.

    ❌ Very complex text: Flesch score 3/100. Consider shorter sentences and simpler words.

    ✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 4.5:1).

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

    ✅ Strong hierarchy: Headlines are 2.3x larger than body text.

    Buy on MyFontsFlesch 3

    Color Palette

    12 unique colors
    Light
    #ffffff
    Background· 15.6%
    #d9dce1
    Secondary· 15.6%
    #ee0000
    Accent· 13.6%
    #18171c
    Text· 7.7%
    #f3ece6
    Primary· 6.8%
    #e0c0b8
    Secondary· 6.4%
    #efd4bf
    Accent· 6.3%
    #585f73
    Secondary· 6.2%

    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

    30 Resources

    20
    Scripts
    10
    Styles
    5
    Async
    1
    Defer

    Top Script Sources

    local(12)f1-eu.readspeaker.com(5)piwik.stadt-koeln.de(1)code.etracker.com(1)etracker.de(1)

    Website Identity

    stadt-koeln.de

    Location detected: 🇩🇪 Germany, Köln, Nordrhein-Westfalenvia tld
    de

    Sponsored

    Last analyzed: 25 Apr 2026 at 09:06

    Historical Analysis & Change Tracking