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dgk.org

https://dgk.org· First analyzed 07 May 2026· Updated 07 May 2026
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dgk.org
Desktop screenshot of dgk.org
Mobile screenshot of dgk.org
Mobile

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Hosting Provider

Haendle & Korte GmbH

IP Address

95.129.215.132

Site Location

🇩🇪 Germanyvia ip

Server Location

🇩🇪 Düsseldorf, Germany

ASN

AS44700

Organization

Haendle & Korte GmbH

Server

Nginx

Nameservers

ns1.hk-net.de.ns2.hk-net.de.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
543 ms10%
Speed Index
706 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
2.5 MB
67 requests

Image Optimization

Responsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
WordPressv6.6.5
cms
DGK Hybrid News Newv0.3Custom
by Justin Tadlock, Roland Nebe, Stefan Hings
View Theme

Technology Stack

8 Technologies Detected

Plugins

4
Widget LogicCookie Law InfoPage List
Contact Form 7

Libraries

1
jQueryv3.7.1

CSS Frameworks

1
Tailwind CSS

Analytics

1
Matomo

Web Servers

1
Nginx

SEO Analysis

D57/100
16
6
4
Meta Tags4/15
Content11/12
Headings6/8
Technical14/25
E-E-A-T3/7
Images2/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
D
dgk.orgdgk.org

Deutsche Gesellschaft für Kardiologie – Herz- und Kreislaufforschun...

No description available for this page.

Title truncated.
Title Length98 chars

Recommended: 50-60 chars (~591px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (4)

  • • Title is too long (98 chars, ~591px). Will be truncated in search results.
  • • Missing meta description — important for click-through rates in SERPs
  • • Most images missing alt text (23/24) — critical for accessibility and SEO

10 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

5 URLs

5 sub-sitemaps

robots.txt

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

D40/100
Bot Access
20/25
Machine Read.
10/25
Schema Data
0/25
Citation
10/25

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:9%
Words:694
Token eff.:Optimal
Sections/1K:7.2

Structured Data

No Schema

Citation Readiness

Opening Summary41w
Descriptive Headingsavg 2.6w
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (11)
AI readiness recommendation preview...
Upgrade to view recommendations

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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.
C
67/100
11
Passed
5
Critical
1
Warnings
Images & Alt Text
10/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
12/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
13/15
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
6/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
2 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.
38/100
D
260 mg
CO₂e / view
2.5 MB
Page Weight
30%
Cleaner Than
New Visitor
297 mg
vs
Returning (cached)
148 mg
Annual (10K/mo)
31.2 kg
Emission Segments
Data Center
13 mg
Network
76 mg
Device
171 mg
Resource Breakdown
JavaScript
209.6 KB
Images
1.8 MB
CSS
414.4 KB
HTML
53.3 KB
Green Hosting Verified
Händle & Korte GmbH
GWF Verified
5 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

0%Critical
Critical / Transactional

HTTPS

No WAF

141d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

GlobalSign nv-sa

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

25.08.2025

Valid Until

26.09.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.dgk.orgdgk.org

SHA-256 Fingerprint

2F:09:FB:D4:C1:98:C8:D9:BC:01:F5:71:23:C8:D1:B9:D3:0B:58:1D...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

content-type
text/html; charset=UTF-8
date
Thu, 07 May 2026 23:01:12 GMT
link
<https://dgk.org/wp-json/>; rel="https://api.w.org/", <https...
server
nginx
x-powered-by
PleskLin
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

45

SPF
DKIM
DMARC

MX Records (3)

mx3.hk-net.de
mx1.hk-net.de
mx2.hk-net.de

Domain Information

dgk.org

Domain Age
26y 3m

Created

06.02.2000

Expires

06.02.2027

Last Updated

23.03.2026

Registrar

Key-Systems GmbH

DNSSEC
Not Enabled

Privacy & Compliance

CookieYes

Cookie Consent Banner
CookieYes
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
CMP: CookieYes
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.
D
40/100
Not 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.
4 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Roboto

WCAG AAA
70/100
Readability
/30
17/30

12px · LH 1.50

Hierarchy
/20
12/20

1.6x ratio

WCAG
/25
24/25

21:1 min contrast

Performance
/25
17/25

System fonts

Heading Font

Roboto

Sans19px

Body Font

Roboto

Sans12px

Contrast Ratio

21:1

WCAG AAA (≥7:1)

Reading Comfort

~84 CPL

Wide lines
19px
h1
19px
h2
19px
h3
16px
h4
12px
p

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

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

⚠️ Wide lines: ~84 chars/line. Use max-width: 65ch for comfortable reading.

⚠️ Hard to read: Flesch score 40/100. Simplify sentences for wider reach.

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 21.0:1).

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

Fluid Type (rem)Flesch 40

Color Palette

6 unique colors
3.49:1 AA Large Light
#ffffff
Background· 71.6%
#938689
Other· 6%
#7c1b33
Primary· 6%
#dfd7d9
Secondary· 5.8%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

1
GDPR Cookie ConsentFree

Cookie consent and privacy compliance tools

2

Categories

2

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

19 Resources

11
Scripts
8
Styles
1
Async
0
Defer

Top Script Sources

dgk.org(9)st.dgk.org(1)widgetlogic.org(1)

Website Identity

dgk.org

info@dgk.org
26 years old

Grafenberger Allee 10040237 DüsseldorfTel.: + 49 211 600692-0Fax: + 49 211 600692-10info@dgk.org

Location detected: 🇩🇪 Germanyvia ip
Key-Systems GmbHde

Social Profiles

FacebookX (Twitter)

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Last analyzed: 07 May 2026 at 23:01

Historical Analysis & Change Tracking