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sdf-eu.org

https://sdf-eu.org· First analyzed 17 May 2026· Updated 17 May 2026
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sdf-eu.org
Desktop screenshot of sdf-eu.org
Mobile screenshot of sdf-eu.org
Mobile

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Hosting Provider

Hetzner
hetzner.com

IP Address

178.63.35.195

Site Location

🇩🇪 Germanyvia ip

Server Location

🇩🇪 Falkenstein, Germany

ASN

AS24940

Organization

Bradley Beck

Server

Apache

Nameservers

ns-b.sdf.org.ns-a.sdfeu.org.ns-d.sdf.org.ns-a.sdf.org.+1 more

Performance

95

Core Web Vitals

Weight

First Contentful Paint
1.1 s10%
Speed Index
1.5 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
537 KB
9 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Hetzner

Progressive Web App

Web Manifest

Technology Stack

2 Technologies Detected

Web Servers

1
Apachev2.4.65

Languages

1
PHPv8.3.27

SEO Analysis

D44/100
11
8
3
Meta Tags4/15
Content6/12
Headings3/8
Technical12/21
E-E-A-T0/7
Images2/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
S
sdf-eu.orgsdf-eu.org

start [SDFeu.org]

No description available for this page.

Title Length20 chars

Recommended: 50-60 chars (~121px / 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
  • • Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

11 issues found

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Local SEO

Local Search Readiness

3/100
Poor
1 14 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

F35/100
Bot Access
20/25
Machine Read.
2/25
Schema Data
0/25
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
Text ratio:13%
Words:165
Token eff.:Too Short
Sections/1K:6.1

Structured Data

No Schema

Citation Readiness

Opening Summary49w
Descriptive Headingsavg 6w
Canonical URL
Open Graph0/3
Twitter Card0/3
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.
C
65/100
9
Passed
5
Critical
1
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
7/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
10/15
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
9/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
4/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
3 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.
64/100
A
54 mg
CO₂e / view
537.4 KB
Page Weight
80%
Cleaner Than
New Visitor
62 mg
vs
Returning (cached)
31 mg
Annual (10K/mo)
6.5 kg
Emission Segments
Data Center
3 mg
Network
16 mg
Device
36 mg
Resource Breakdown
JavaScript
432.5 KB
Images
14.3 KB
CSS
3.4 KB
HTML
8.9 KB
Other
78.3 KB
Green Hosting Verified
Hetzner Online GmbH
GWF Verified
3 recommendations
  • •Carbon footprint recommendation preview...
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F

Security Score

36%Critical
Interactive

HTTPS

No WAF

80d

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

07.05.2026

Valid Until

05.08.2026

Subject Alternative Names (1)

sdfeu.org

SHA-256 Fingerprint

AD:B1:7D:84:40:1C:6C:00:F5:96:75:65:C3:CC:E0:86:2A:37:D2:D4...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges
bytes
connection
Keep-Alive
content-length
64
content-type
text/html
date
Sun, 17 May 2026 13:48:40 GMT
etag
"40-4bf238bf9b100"
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

68

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (2)

sdfeu.org
sdf-eu.org

Domain Information

sdf-eu.org

Domain Age
24y 3m

Created

28.01.2002

Expires

28.01.2027

Last Updated

04.01.2026

Registrar

Tucows Domains Inc.

DNSSEC
Not Enabled

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.
F
28/100
Not Mobile Friendly
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.
5 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Helvetica

WCAG AAA
56/100
Readability
/30
14/30

13px · LH 1.40

Hierarchy
/20
7/20
WCAG
/25
21/25

8.65:1 min contrast

Performance
/25
14/25

1 font

Heading Font

Helvetica

Sans

Body Font

Helvetica

Sans13px

Contrast Ratio

8.65:1

WCAG AAA (≥7:1)

Reading Comfort

~99 CPL

Wide lines
19px
h2
13px
p

❌ Critical: 13px body text is too small. Minimum 14px, recommend 16px+.

✅ Optimal line spacing: 1.40 ratio (ideal range 1.4–1.6).

⚠️ Wide lines: ~99 chars/line. Use max-width: 65ch for comfortable reading.

❌ Very complex text: Flesch score 29/100. Consider shorter sentences and simpler words.

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 8.7:1).

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

Buy on MyFontsFlesch 29

Color Palette

5 unique colors
3.7:1 AA Large Light
#eeeeee
Background· 84.2%
#7a7a7a
Other· 3.3%

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Scripts & Styles

3 Resources

2
Scripts
1
Styles
0
Async
2
Defer

Top Script Sources

local(2)

Website Identity

sdf-eu.org

24 years old
Location detected: 🇩🇪 Germanyvia ip
Tucows Domains Inc.en

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Last analyzed: 17 May 2026 at 13:49

Historical Analysis & Change Tracking