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dumont-buchverlag.de

https://dumont-buchverlag.de· First analyzed 13 May 2026· Updated 13 May 2026
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dumont-buchverlag.de
Desktop screenshot of dumont-buchverlag.de
Mobile screenshot of dumont-buchverlag.de
Mobile

Sponsored

Hosting Provider

DigitalOcean
digitalocean.com

IP Address

165.232.66.223

Site Location

🇩🇪 Köln, Germanyvia schema_nap

Server Location

🇩🇪 Frankfurt am Main, Germany

ASN

AS14061

Organization

DigitalOcean, LLC

Server

Nginx

CDN

CDN

Nameservers

ns.udag.net.ns.udag.org.ns.udag.de.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
514 ms10%
Speed Index
668 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.5 MB
88 requests

Image Optimization

Lazy LoadResponsiveCloudinary
0–49
50–89
90–100

Architecture Stack

Hybrid
⚙️ SSR
Frontend
Framework
Next.js
Styling
Tailwind CSS
Infrastructure
Hosting
DigitalOcean
CDN
CDN

Technology Stack

5 Technologies Detected

Meta Frameworks

1
Next.js

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

Analytics

1
Facebook Pixel

Web Servers

1
Nginx

SEO Analysis

B76/100
22
4
0
Meta Tags15/15
Content3/12
Headings8/8
Technical23/25
E-E-A-T2/7
Images5/7
Links5/5
URL5/5
Social3/5
Freshness0/4
Mobile4/4
Indexability3/3
D
dumont-buchverlag.dedumont-buchverlag.de

Startseite | DuMont Buchverlag | DuMont Buchverlag

Entdecke die Welt der Bücher beim DuMont Buchverlag! Faszinierende Romane, inspirierende Sachbücher und aktuelle Bestseller warten auf Dich. Jetzt stöbern!

Title Length50 chars

Recommended: 50-60 chars (~304px / 580px)

Description Length155 chars

Recommended: 120-160 chars

Issues (0)

    4 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: index

    4 URLs

    4 sub-sitemaps

    robots.txt

    17 rules

    Sitemap reference found

    Local SEO

    Local Search Readiness

    27/100
    Needs Work
    8 12

    Sponsored

    AI & LLM Readiness

    D48/100
    Bot Access
    20/25
    Machine Read.
    12/25
    Schema Data
    7/25
    Citation
    9/25

    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
    Text ratio:1%
    Words:2,048
    Token eff.:Optimal
    Sections/1K:4.9

    Structured Data

    3 JSON-LD
    Organization×1.1WebSiteSearchAction
    sameAs entity links

    Citation Readiness

    Opening Summary
    Descriptive Headingsavg 2.5w
    Canonical URL
    Open Graph3/3
    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.
    C
    66/100
    11
    Passed
    6
    Critical
    2
    Warnings
    Images & Alt Text
    13/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    14/20
    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
    7/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    2/15
    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.
    62/100
    C
    151 mg
    CO₂e / view
    1.5 MB
    Page Weight
    60%
    Cleaner Than
    New Visitor
    173 mg
    vs
    Returning (cached)
    87 mg
    Annual (10K/mo)
    18.2 kg
    Emission Segments
    Data Center
    7 mg
    Network
    45 mg
    Device
    99 mg
    Resource Breakdown
    JavaScript
    638.2 KB
    Images
    541.0 KB
    CSS
    193.6 KB
    HTML
    124.4 KB
    Other
    1.1 KB
    Green Hosting Verified
    DigitalOcean
    Provider Match
    5 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    A+

    Security Score

    96%Excellent
    Static / Informational

    HTTPS

    No WAF

    49d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Let's Encrypt

    Key Algorithm

    ECDSA (secp256r1) (256 bit)

    Signature

    ECDSA with SHA-384

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2

    Valid From

    03.04.2026

    Valid Until

    02.07.2026

    Subject Alternative Names (2)

    dumont-buchverlag.dewww.dumont-buchverlag.de

    SHA-256 Fingerprint

    A0:6C:E3:D6:41:AA:50:42:3F:0B:E6:3C:00:09:EE:0B:7E:8E:CA:5D...

    Upgrade to view header details

    HTTP Headers

    Developer Console

    cache-control
    🟡 120s(public, max-age=120)
    content-encoding
    📦 Gzip(gzip)
    content-security-policy
    default-src 'self' *.wirth-horn.de *.brevo.com https://sibau...
    content-type
    text/html; charset=utf-8
    date
    Wed, 13 May 2026 16:30:35 GMT
    etag
    "17a1nd7cpng1ccuo"
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    70

    SPF
    DKIM
    DMARC

    DMARC Policy

    None (Monitor Only)

    MX Records (3)

    mail2.mds.de
    mail1.mds.de
    mail.mds.de

    Domain Information

    dumont-buchverlag.de

    Last Updated

    02.10.2024

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Quantcast Choice

    Cookie Consent Banner
    Quantcast Choice
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    CMP: Quantcast Choice
    Privacy policy page linked
    Data Protection Officer mentioned

    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
    59/100
    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
    2 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Brandon-Regular + Brandon-Light

    WCAG AAA
    70/100
    Readability
    /30
    24/30

    20px · LH 1.50

    Hierarchy
    /20
    11/20

    2x ratio

    WCAG
    /25
    19/25

    14.86:1 min contrast

    Performance
    /25
    16/25

    3 fonts · 3 req

    Heading Font

    Brandon-Regular

    Sans40px

    Body Font

    Brandon-Light

    Sans20px

    Contrast Ratio

    14.86:1

    WCAG AAA (≥7:1)

    Reading Comfort

    ~32 CPL

    Narrow lines
    40px
    h1
    45px
    h2
    30px
    h3
    20px
    p

    ✅ Excellent readability: 20px body text is ideal for all devices.

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

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

    ✅ WCAG AAA contrast: All text meets 7:1 ratio (min 14.9:1).

    ❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

    ✅ Strong hierarchy: Headlines are 2.0x larger than body text.

    Buy on MyFontsFlesch 0

    Color Palette

    9 unique colors
    21:1 AAA Light
    #ffffff
    Background· 18.3%
    #000000
    Text· 14.399999999999999%
    #d3c7df
    Primary· 40.60000000000001%
    #c7bacb
    Secondary· 3.4%
    #21252a
    Secondary· 2.4%

    Business & Marketing Stack

    2 Tools Detected

    Growing

    Behavior Analytics

    1
    Google AnalyticsFree

    User behavior and product analytics

    Advertising

    1
    Facebook PixelMid-Market

    Ad platforms and retargeting pixels

    2

    Categories

    2

    Total Tools

    0

    Enterprise

    1

    Mid-Market

    Assessment: Growing marketing technology adoption

    Sponsored

    Scripts & Styles

    28 Resources

    20
    Scripts
    8
    Styles
    4
    Async
    16
    Defer

    Top Script Sources

    local(17)connect.facebook.net(2)rybbit.wirth-horn.de(1)

    Website Identity

    DuMont Buchverlag

    DuMont Buchverlag

    Organization

    Alle Bücher vom Verlag DuMont Buchverlag

    info@dumont-buchverlag.de
    www.dumont-buchverlag.de

    Amsterdamer Straße 192, Köln

    D – 50735 , Köln

    DE

    Location detected: 🇩🇪 Germany, Kölnvia schema_nap
    de

    Sponsored

    Last analyzed: 13 May 2026 at 16:31

    Historical Analysis & Change Tracking