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emf-portal.org

https://emf-portal.org· First analyzed 20 May 2026· Updated 20 May 2026
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emf-portal.org
Desktop screenshot of emf-portal.org
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Mobile

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Hosting Provider

RWTH Aachen University

IP Address

137.226.50.179

Site Location

🇩🇪 Germanyvia ip

Server Location

🇩🇪 Aachen, Germany

ASN

AS47610

Organization

RWTH Aachen University

Server

Apache

Nameservers

zs1.rz.rwth-aachen.de.dns-1.dfn.de.zs2.rz.rwth-aachen.de.dns-2.dfn.de.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
492 ms10%
Speed Index
640 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
652 KB
27 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
RWTH Aachen University

Technology Stack

5 Technologies Detected

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

Fonts

1
Google Fonts

Analytics

1
Matomo

Web Servers

1
Apache

SEO Analysis

D59/100
17
8
1
Meta Tags4/15
Content12/12
Headings8/8
Technical13/25
E-E-A-T3/7
Images2/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
E
emf-portal.orgemf-portal.org

EMF-Portal | Home

No description available for this page.

Title Length17 chars

Recommended: 50-60 chars (~106px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

  • • Missing meta description — important for click-through rates in SERPs

9 issues found

Upgrade to view details

Crawlability

Sitemap
robots.txt

125 rules

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

F24/100
Bot Access
3/25
Machine Read.
11/25
Schema Data
0/25
Citation
10/25

AI Bot Access

0/14 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
blockquotesnavheader/footer
Text ratio:13%
Words:1,437
Token eff.:Optimal
Sections/1K:9.7
Depth:3/5

Structured Data

No Schema

Citation Readiness

Opening Summary61w
Descriptive Headingsavg 7.5w
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.
B
72/100
12
Passed
4
Critical
1
Warnings
Images & Alt Text
10/20
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
12/15
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
9/15
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.
50/100
B
81 mg
CO₂e / view
651.8 KB
Page Weight
80%
Cleaner Than
New Visitor
92 mg
vs
Returning (cached)
46 mg
Annual (10K/mo)
9.7 kg
Emission Segments
Data Center
18 mg
Network
19 mg
Device
43 mg
Resource Breakdown
JavaScript
489.8 KB
Images
18.1 KB
CSS
130.9 KB
Fonts
2.3 KB
HTML
10.7 KB
Green Hosting Not Verified
RWTH Aachen University
4 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
B

Security Score

71%Good
Interactive

HTTPS

No WAF

160d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

27.10.2025

Valid Until

27.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (4)

www.emf-portal.orgemf-portal.orgwww.emf-portal.deemf-portal.de

SHA-256 Fingerprint

B3:DF:3F:0F:30:54:0F:61:C1:64:CC:A8:E8:C0:23:87:08:77:8D:4F...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control
🟡 0s(max-age=0, must-revalidate, private)
content-encoding
📦 Gzip(gzip)
content-length
10665
content-security-policy
default-src 'self'; script-src 'self' 'unsafe-inline' https:...
content-type
text/html; charset=UTF-8
date
Wed, 20 May 2026 07:38:06 GMT
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

75

SPF
DKIM
DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

mx1.rz.rwth-aachen.de

Domain Information

emf-portal.org

Domain Age
24y 2m

Created

06.03.2002

Expires

06.03.2027

Last Updated

20.04.2026

Registrar

COREhub, S.R.L.

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
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.
C
69/100
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, initial-scale=1, shrink-to-fit=no
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Open Sans

WCAG Partial
78/100
Readability
/30
25/30

16px · LH 1.50

Hierarchy
/20
18/20

2.5x ratio · ✓ H1→H6

WCAG
/25
17/25

2.59:1 min contrast

Performance
/25
18/25

1 font · 2 req

Heading Font

Open Sans

Sans40px

Body Font

Open Sans

Sans16px

Contrast Ratio

2.59:1

15 issues

Reading Comfort

~36 CPL

Narrow lines
40px
h1
20px
h2
16px
h3
16px
p

✅ Excellent readability: 16px body text is ideal for all devices.

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

❌ Very complex text: Flesch score 30/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 15 elements below WCAG AA threshold (min 2.6:1).

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

✅ Strong hierarchy: Headlines are 2.5x larger than body text.

GGoogle FontsFlesch 30

Color Palette

10 unique colors
2.28:1 Fail Light
#ffffff
Background· 39.8%
#b0aaac
Other· 11.700000000000001%
#02539c
Primary· 13.1%
#3d8ba7
Secondary· 8.2%
#2167a2
Accent· 4%
#ccdbdc
Secondary· 3.9%
#75a2b3
Secondary· 2.4%

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

17 Resources

14
Scripts
3
Styles
1
Async
1
Defer

Top Script Sources

local(13)piwik.femu.de(1)

Website Identity

emf-portal.org

24 years old
Location detected: 🇩🇪 Germanyvia ip
COREhub, S.R.L.en

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Last analyzed: 20 May 2026 at 07:38

Historical Analysis & Change Tracking