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irbnet.de

https://irbnet.de· First analyzed 14 May 2026· Updated 14 May 2026
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irbnet.de
Desktop screenshot of irbnet.de
Mobile screenshot of irbnet.de
Mobile

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Hosting Provider

FHG-Stuttgart

IP Address

129.233.84.2

Site Location

🇩🇪 Stuttgart, Germanyvia tld

Server Location

🇩🇪 Karlsruhe, Germany

ASN

AS5501

Organization

FHG-Stuttgart

Server

Apache

Nameservers

ns1.fraunhofer.de.ns3.fraunhofer.de.ns2.fraunhofer.de.ns5.fraunhofer.de.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
678 ms10%
Speed Index
881 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
2 MB
36 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Adobe Experience Manager

Technology Stack

3 Technologies Detected

Libraries

1
jQuery

CSS Frameworks

1
Tailwind CSS

Web Servers

1
Apache

SEO Analysis

B71/100
20
6
1
Meta Tags12/15
Content12/12
Headings8/8
Technical18/25
E-E-A-T0/7
Images1/7
Links5/5
URL5/5
Social3/5
Freshness0/4
Mobile4/4
Indexability3/3
I
irbnet.deirbnet.de

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Title Length39 chars

Recommended: 50-60 chars (~243px / 580px)

Description Length157 chars

Recommended: 120-160 chars

Issues (1)

  • • Most images missing alt text (1/1) — critical for accessibility and SEO

7 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

109 URLs

robots.txt

21 rules

Sitemap reference found

Local SEO

Local Search Readiness

14/100
Poor
4 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

D44/100
Bot Access
20/25
Machine Read.
14/25
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
navheader/footer
Text ratio:11%
Words:825
Token eff.:Optimal
Sections/1K:32.7
Depth:2/5

Structured Data

Microdata

Citation Readiness

Opening Summary66w
Descriptive Headingsavg 2.7w
Canonical URL
Open Graph2/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (9)
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.
B
78/100
12
Passed
2
Critical
1
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
20/20
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.
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.
32/100
D
251 mg
CO₂e / view
2.0 MB
Page Weight
50%
Cleaner Than
New Visitor
287 mg
vs
Returning (cached)
144 mg
Annual (10K/mo)
30.2 kg
Emission Segments
Data Center
56 mg
Network
60 mg
Device
135 mg
Resource Breakdown
JavaScript
379.8 KB
Images
5.1 KB
CSS
1.6 MB
HTML
8.5 KB
Green Hosting Not Verified
FHG-Stuttgart
4 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
B

Security Score

71%Good
Interactive

HTTPS

No WAF

152d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

13.10.2025

Valid Until

13.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

irb.fraunhofer.de

SHA-256 Fingerprint

25:BD:36:65:2E:97:B2:C9:B3:58:CC:3F:A7:C2:70:28:79:99:41:0B...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges
bytes
age
265698
content-encoding
📦 Gzip(gzip)
content-length
8414
content-security-policy
frame-ancestors 'none'
content-type
text/html;charset=utf-8
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

0

SPF
DKIM
DMARC

Domain Information

irbnet.de

Last Updated

05.06.2023

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

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
64/100
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, user-scalable=yes
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

FrutigerLTW02

WCAG Partial
64/100
Readability
/30
20/30

17px · LH 1.29

Hierarchy
/20
12/20

0.86x ratio · ✓ H1→H6

WCAG
/25
17/25

1.93:1 min contrast

Performance
/25
15/25

1 font · 3 req

Heading Font

FrutigerLTW02

Sans14px

Body Font

FrutigerLTW02

Sans17px

Contrast Ratio

1.93:1

48 issues

Reading Comfort

~35 CPL

Narrow lines
14px
h1
34px
h2
29px
h3
17px
p
Golden Ratio
Scale

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

⚠️ Tight line spacing (1.29). Increase to 1.4–1.6 for better readability.

⚠️ Partial contrast: 48 elements below WCAG AA threshold (min 1.9:1).

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

⚠️ Weak hierarchy: Headlines should be ≥2x body size for clear visual structure.

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

Buy on MyFonts

Color Palette

10 unique colors
Light
#ffffff
Background· 54.2%
#e3e3e8
Primary· 6.6%
#61b2ab
Secondary· 5.4%
#019174
Accent· 4.6%
#185051
Accent· 4.2%
#288c95
Accent· 3.6%
#abd0a2
Secondary· 2.1%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

1

Categories

1

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

11 Resources

10
Scripts
1
Styles
8
Async
0
Defer

Top Script Sources

local(10)

Website Identity

irbnet.de

Location detected: 🇩🇪 Germany, Stuttgartvia tld
de

Social Profiles

LinkedIn

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Last analyzed: 14 May 2026 at 09:15

Historical Analysis & Change Tracking