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zdb.de

https://zdb.de· First analyzed 27 May 2026· Updated 27 May 2026
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zdb.de
Desktop screenshot of zdb.de
Mobile screenshot of zdb.de
Mobile

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Hosting Provider

maxcluster GmbH

IP Address

194.6.209.137

Site Location

🇩🇪 Germanyvia tld

Server Location

🇩🇪 Paderborn, Germany

ASN

AS47447

Organization

maxcluster GmbH

Server

Apache

Nameservers

ns41.cloudns.net.ns44.cloudns.net.ns43.cloudns.net.ns42.cloudns.net.

Performance

98

Core Web Vitals

Weight

First Contentful Paint
913 ms10%
Speed Index
1.2 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
3.2 MB
45 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
TYPO3

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

4 Technologies Detected

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

Analytics

1
Matomo

Web Servers

1
Apache

SEO Analysis

C61/100
17
8
3
Meta Tags4/15
Content10/12
Headings3/8
Technical19/21
E-E-A-T3/7
Images2/7
Links5/5
URL5/5
Social1/5
Freshness2/4
Mobile4/4
Indexability3/3
Z
zdb.dezdb.de

Startseite

No description available for this page.

Title Length10 chars

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

Description Length0 chars

Recommended: 120-160 chars

Issues (3)

  • • Missing meta description — important for click-through rates in SERPs
  • • Missing H1 tag — every page should have exactly one H1
  • • Most images missing alt text (39/40) — critical for accessibility and SEO

11 issues found

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Local SEO

Local Search Readiness

10/100
Poor
3 12 2

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

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AI & LLM Readiness

D44/100
Bot Access
20/25
Machine Read.
8/25
Schema Data
3/25
Citation
13/25

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:3%
Words:524
Token eff.:Optimal
Sections/1K:63
Depth:1/5

Structured Data

Microdata
Article×1.2microdata

Citation Readiness

Opening Summary21w
Descriptive Headingsavg 3.1w
Canonical URL
Open Graph0/3
Twitter Card1/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (11)
AI readiness recommendation preview...
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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
78/100
12
Passed
6
Critical
0
Warnings
Images & Alt Text
18/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
13/20
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
6/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
11/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
2 recommendations
  • •Accessibility recommendation preview...
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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.
52/100
E
332 mg
CO₂e / view
3.2 MB
Page Weight
30%
Cleaner Than
New Visitor
379 mg
vs
Returning (cached)
190 mg
Annual (10K/mo)
39.8 kg
Emission Segments
Data Center
16 mg
Network
98 mg
Device
218 mg
Resource Breakdown
JavaScript
102.0 KB
Images
1.6 MB
CSS
1.5 MB
HTML
17.0 KB
Green Hosting Verified
23M GmbH
GWF Verified
4 recommendations
  • •Carbon footprint recommendation preview...
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B

Security Score

76%Good
Static / Informational

HTTPS

No WAF

143d

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

02.04.2026

Valid Until

17.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

www.zdb.dezdb.de

SHA-256 Fingerprint

B4:32:F3:E6:7D:15:BB:6B:D0:E8:1A:06:3D:EB:CF:B8:D5:A3:E1:4F...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control
🟡 23 Hours(max-age=84892)
content-encoding
📦 Gzip(gzip)
content-language
de
content-type
text/html; charset=utf-8
date
Wed, 27 May 2026 23:38:23 GMT
expires
Thu, 28 May 2026 23:13:15 GMT
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

93

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

mxtls.expurgate.net

Domain Information

zdb.de

Last Updated

18.01.2024

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
76/100
Mobile Friendly26 breakpoints
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
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Barlow

WCAG Partial
59/100
Readability
/30
22/30

17px · LH 1.41

Hierarchy
/20
8/20
WCAG
/25
16/25

1:1 min contrast

Performance
/25
13/25

1 font · 5 req

Heading Font

Barlow

Sans

Body Font

Barlow

Sans17px

Contrast Ratio

1:1

24 issues

Reading Comfort

~37 CPL

Narrow lines
30px
h2
32px
h3
17px
p

✅ Excellent readability: 17px body text is ideal for all devices.

✅ Optimal line spacing: 1.41 ratio (ideal range 1.4–1.6).

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

⚠️ Partial contrast: 24 elements below WCAG AA threshold (min 1.0:1).

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

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

Buy on MyFontsFlesch 0

Color Palette

14 unique colors
9.06:1 AAA Dark
#000000
Text· 13.9%
#aeaaa0
Secondary· 7.2%
#fffefe
Primary· 14.8%
#0089c2
Primary· 9.5%
#d3ac9a
Secondary· 8.3%
#94b3af
Secondary· 8%
#afbeb7
Secondary· 6.3%
#7cacaf
Secondary· 5.1%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

1
CookiebotMid-Market

Cookie consent and privacy compliance tools

2

Categories

2

Total Tools

0

Enterprise

1

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

6 Resources

3
Scripts
3
Styles
0
Async
0
Defer

Top Script Sources

local(3)

Website Identity

zdb.de

[email protected]
Location detected: 🇩🇪 Germanyvia tld
de-DE

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Last analyzed: 27 May 2026 at 23:38

Historical Analysis & Change Tracking

zdb.de Technology Stack - Built With Tailwind CSS, Font Awesome, Matomo, Apache | StackOptic | StackOptic