StackOptic
Back to Search
bonn.de favicon

bonn.de

https://bonn.de· First analyzed 25 Apr 2026· Updated 25 Apr 2026
Export
bonn.de
Desktop screenshot of bonn.de
Mobile screenshot of bonn.de
Mobile

Sponsored

Hosting Provider

De Kdvz Frechen

IP Address

185.155.109.38

Site Location

🇩🇪 Germanyvia tld

Server Location

🇩🇪 Bergheim, Germany

ASN

AS202577

Organization

De Kdvz Frechen

Server

myracloud

Nameservers

ns2.tops.net.dns-1.bonn.de.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
407 ms10%
Speed Index
529 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.5 MB
103 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
De Kdvz Frechen

Progressive Web App

PWA ReadyWeb ManifestService WorkerApple Touch IconTheme Color

Technology Stack

2 Technologies Detected

CSS Frameworks

1
Tailwind CSS

Analytics

1
Matomo

SEO Analysis

C69/100
18
8
0
Meta Tags9/15
Content10/12
Headings5/8
Technical20/25
E-E-A-T0/7
Images4/7
Links5/5
URL5/5
Social4/5
Freshness0/4
Mobile4/4
Indexability3/3
B
bonn.debonn.de

Startseite | Bundesstadt Bonn

Herzlich willkommen auf den Internetseiten der Bundesstadt Bonn! Hier finden Sie Informationen zur Stadt und haben Zugang zu allen Services der Stadtverwaltung.

Title Length29 chars

Recommended: 50-60 chars (~175px / 580px)

Description Length160 chars

Recommended: 120-160 chars

Issues (0)

    8 issues found

    Upgrade to view details

    Crawlability

    Sitemap
    robots.txt

    52 rules

    Local SEO

    Local Search Readiness

    8/100
    Poor
    3 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

    F37/100
    Bot Access
    11/25
    Machine Read.
    12/25
    Schema Data
    1/25
    Citation
    13/25

    AI Bot Access

    5/14 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:3%
    Words:646
    Token eff.:Optimal
    Sections/1K:13.9

    Structured Data

    1 JSON-LD
    BreadcrumbList

    Citation Readiness

    Opening Summary540w
    Descriptive Headingsavg 3w
    Canonical URL
    Open Graph3/3
    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.
    A
    88/100
    15
    Passed
    3
    Critical
    0
    Warnings
    Images & Alt Text
    18/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    15/20
    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
    12/15
    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.
    48/100
    C
    193 mg
    CO₂e / view
    1.5 MB
    Page Weight
    60%
    Cleaner Than
    New Visitor
    221 mg
    vs
    Returning (cached)
    110 mg
    Annual (10K/mo)
    23.2 kg
    Emission Segments
    Data Center
    43 mg
    Network
    46 mg
    Device
    104 mg
    Resource Breakdown
    JavaScript
    510.1 KB
    Images
    801.7 KB
    CSS
    220.1 KB
    HTML
    27.7 KB
    Other
    618 B
    Green Hosting Not Verified
    De Kdvz Frechen
    5 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    A

    Security Score

    81%Very Good
    Interactive

    HTTPS

    No WAF

    211d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Sectigo Limited

    Key Algorithm

    RSA (2048 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2

    Valid From

    02.12.2025

    Valid Until

    22.11.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (2)

    *.bonn.debonn.de

    SHA-256 Fingerprint

    A5:CB:A6:3D:33:02:F7:4E:E8:4E:04:AD:44:E5:E2:8E:F2:1C:BE:CC...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    access-control-allow-headers
    Content-Type, Cache-Control
    cache-control
    🟡 0s(max-age=0)
    content-encoding
    📦 Gzip(gzip)
    content-security-policy
    default-src 'self' http: https: data: blob: 'unsafe-inline' ...
    content-type
    text/html; charset=UTF-8
    date
    Sat, 25 Apr 2026 12:46:37 GMT
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    70

    SPF
    DKIM
    DMARC

    DMARC Policy

    None (Monitor Only)

    MX Records (2)

    mailgw01.regioit.de
    mailgw02.regioit.de

    Domain Information

    bonn.de

    Last Updated

    14.07.2014

    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
    72/100
    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, minimum-scale=1, user-scalable=yes
    2 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Overpass + -apple-system

    WCAG Partial
    65/100
    Readability
    /30
    19/30

    14px · LH 1.50

    Hierarchy
    /20
    13/20

    1.25x ratio

    WCAG
    /25
    17/25

    1:1 min contrast

    Performance
    /25
    16/25

    System fonts

    Heading Font

    Overpass

    Sans18px

    Body Font

    -apple-system

    Sans14px

    Contrast Ratio

    1:1

    1 issue

    Reading Comfort

    ~40 CPL

    Narrow lines
    18px
    h1
    34px
    h2
    14px
    p
    Minor Third
    Scale

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

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

    ⚠️ Hard to read: Flesch score 34/100. Simplify sentences for wider reach.

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

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

    ⚠️ Weak hierarchy: Headlines should be ≥2x body size for clear visual structure.

    Buy on MyFontsFluid TypeFlesch 34

    Color Palette

    14 unique colors
    2.39:1 Fail Light
    #879092
    Other· 12.100000000000001%
    #5b504c
    Secondary· 5.9%
    #dae8f4
    Accent· 14%
    #bad6ed
    Accent· 9.5%
    #88b8e1
    Accent· 7.6%
    #9fc3e3
    Accent· 7.6%
    #fcfefe
    Primary· 6.4%
    #28333a
    Secondary· 5.3%

    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

    15 Resources

    11
    Scripts
    4
    Styles
    3
    Async
    0
    Defer

    Top Script Sources

    local(9)use.bonn.de(1)prod-chat-app.neurabot.neuraflow.de(1)

    Website Identity

    bonn.de

    Location detected: 🇩🇪 Germanyvia tld
    de-DE

    Sponsored

    Last analyzed: 25 Apr 2026 at 12:46

    Historical Analysis & Change Tracking