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zkrd.de

https://zkrd.de· First analyzed 02 Jun 2026· Updated 02 Jun 2026
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zkrd.de
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Hosting Provider

Hetzner
hetzner.com

IP Address

176.9.141.69

Site Location

🇩🇪 Germanyvia tld

Server Location

🇩🇪 Falkenstein, Germany

ASN

AS24940

Server

Apache

Nameservers

x.ns.joker.com.y.ns.joker.com.z.ns.joker.com.

Performance

80

Core Web Vitals

Weight

First Contentful Paint
2.2 s10%
Speed Index
2.9 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.6 MB
136 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Tailwind CSS
CMS
WordPressv6.7.41
Infrastructure
Hosting
Hetzner

Technology Stack

22 Technologies Detected

Plugins

10
RevsliderPdf PrintWp_Glossary
WPML
Image WatermarkBorlabs Cookie
Contact Form 7
Fusion Builder
Yoast SEO
WPML

UI Components

2
SwiperLightbox

Libraries

1
jQueryv3.7.1

Other

1
GSAP

Other

1
Chart.js

Other

1
Modernizr

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

Analytics

1
Matomo

Web Servers

1
Apache

Languages

1
PHPv8.2.31

Customer Support

1
Zendesk

SEO Analysis

A84/100
25
5
1
Meta Tags14/15
Content10/12
Headings8/8
Technical24/25
E-E-A-T0/7
Images3/7
Links5/5
URL5/5
Social5/5
Freshness4/4
Mobile3/4
Indexability3/3
Z
zkrd.dezkrd.de

ZKRD - Zentrales Knochenmarkspender-Register Deutschland

Als Knotenpunkt bei der Spendersuche steuert das ZKRD das Matching von Patienten und Stammzellspendern weltweit.

Title Length56 chars

Recommended: 50-60 chars (~343px / 580px)

Description Length112 chars

Recommended: 120-160 chars

Issues (1)

  • • Most images missing alt text (10/18) — critical for accessibility and SEO

6 issues found

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Crawlability

Sitemap

Type: index

10 URLs

10 sub-sitemaps

robots.txt

3 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

15/100
Poor
4 12 1

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

D47/100
Bot Access
20/25
Machine Read.
7/25
Schema Data
4/25
Citation
16/25

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:3%
Words:790
Token eff.:Optimal

Structured Data

4 JSON-LD
WebSiteBreadcrumbListSearchAction

Citation Readiness

Opening Summary50w
Descriptive Headingsavg 1.2w
Canonical URL
Open Graph3/3
Twitter Card3/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (10)
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.
A
82/100
13
Passed
3
Critical
1
Warnings
Images & Alt Text
15/20
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
11/15
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...
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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.
62/100
C
166 mg
CO₂e / view
1.6 MB
Page Weight
60%
Cleaner Than
New Visitor
189 mg
vs
Returning (cached)
95 mg
Annual (10K/mo)
19.9 kg
Emission Segments
Data Center
8 mg
Network
49 mg
Device
109 mg
Resource Breakdown
JavaScript
798.0 KB
Images
281.1 KB
CSS
289.8 KB
Fonts
236.9 KB
HTML
33.7 KB
Green Hosting Verified
Hetzner
Provider Match
4 recommendations
  • •Carbon footprint recommendation preview...
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D

Security Score

41%Poor
Interactive

HTTPS

No WAF

89d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

02.06.2026

Valid Until

31.08.2026

Subject Alternative Names (2)

www.zkrd.dezkrd.de

SHA-256 Fingerprint

69:30:BA:6D:4C:25:00:6C:78:DD:FD:B5:51:2F:A3:AE:80:8A:0B:4F...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

connection
Keep-Alive
content-encoding
📦 Gzip(gzip)
content-length
34230
content-type
text/html; charset=UTF-8
date
Tue, 02 Jun 2026 20:18:32 GMT
keep-alive
timeout=5, max=100
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

45

SPF
DKIM
DMARC

MX Records (1)

mailserver.zkrd.de

Domain Information

zkrd.de

Last Updated

09.01.2024

DNSSEC
Not Enabled

Privacy & Compliance

Borlabs Cookie

Cookie Consent Banner
Borlabs Cookie
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
CMP: Borlabs Cookie
Privacy policy page linked
Legitimate interest basis 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.
A
84/100
Mobile Friendly31 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
1 recommendation
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Noto Sans

WCAG Partial
60/100
Readability
/30
12/30

12px · LH 1.25

Hierarchy
/20
20/20

2.78x ratio · ✓ H1→H6

WCAG
/25
12/25

1.31:1 min contrast

Performance
/25
16/25

2 fonts · 13 req

Heading Font

Noto Sans

Sans34px

Body Font

Noto Sans

Sans12px

Contrast Ratio

1.31:1

28 issues

Reading Comfort

~43 CPL

Narrow lines
34px
h1
34px
h2
25px
h3
14px
h4
12px
p

❌ Critical: 12px body text is too small. Minimum 14px, recommend 16px+.

⚠️ Tight line spacing (1.25). Increase to 1.4–1.6 for better readability.

❌ Very complex text: Flesch score 17/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 28 elements below WCAG AA threshold (min 1.3:1).

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

✅ Strong hierarchy: Headlines are 2.8x larger than body text.

Buy on MyFontsFlesch 17

Color Palette

7 unique colors
12.63:1 AAA Dark
#333333
Text· 48.2%
#ffffff
Background· 18.700000000000003%
#275acc
Primary· 6.7%
#adb8cc
Secondary· 5.6%

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

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Scripts & Styles

30 Resources

20
Scripts
10
Styles
1
Async
2
Defer

Top Script Sources

zkrd.de(20)

Website Identity

ZKRD - Zentrales Knochenmarkspender-Register Deutschland

Als Knotenpunkt bei der Spendersuche steuert das ZKRD das Matching von Patienten und Stammzellspendern weltweit.

zkrd.de/
Location detected: 🇩🇪 Germanyvia tld
de-DE

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Last analyzed: 02 Jun 2026 at 20:19

Historical Analysis & Change Tracking