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lrz.de

https://lrz.de· First analyzed 01 May 2026· Updated 01 May 2026
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lrz.de
Desktop screenshot of lrz.de
Mobile screenshot of lrz.de
Mobile

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Hosting Provider

LRZ-MUNICH

IP Address

129.187.254.9

Site Location

🇩🇪 Germanyvia phone

Server Location

🇩🇪 Munich, Germany

ASN

AS12816

Organization

LRZ-MUNICH

Server

Apache

Nameservers

dns1.lrz.de.dns3.lrz.eu.dns2.lrz.bayern.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
489 ms10%
Speed Index
636 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.2 MB
11 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
TYPO3

Technology Stack

2 Technologies Detected

CSS Frameworks

1
Tailwind CSS

Web Servers

1
Apachev2

SEO Analysis

C66/100
20
7
2
Meta Tags7/15
Content10/12
Headings8/8
Technical20/25
E-E-A-T0/7
Images3/7
Links5/5
URL5/5
Social1/5
Freshness0/4
Mobile4/4
Indexability3/3
L
lrz.delrz.de

Startseite - Leibniz-Rechenzentrum

No description available for this page.

Title Length34 chars

Recommended: 50-60 chars (~207px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

  • • Missing meta description — important for click-through rates in SERPs
  • • Most images missing alt text (7/11) — critical for accessibility and SEO

9 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

3 URLs

3 sub-sitemaps

robots.txt

10 rules

Sitemap reference found

Local SEO

Local Search Readiness

22/100
Needs Work
6 10 2

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AI & LLM Readiness

F35/100
Bot Access
20/25
Machine Read.
8/25
Schema Data
0/25
Citation
7/25

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
nav
Text ratio:5%
Words:1,813
Token eff.:Optimal
Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary
Descriptive Headings
Canonical URL
Open Graph0/3
Twitter Card1/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (11)
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
83/100
13
Passed
1
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
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
2/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
2 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.
51/100
C
150 mg
CO₂e / view
1.2 MB
Page Weight
70%
Cleaner Than
New Visitor
171 mg
vs
Returning (cached)
85 mg
Annual (10K/mo)
17.9 kg
Emission Segments
Data Center
33 mg
Network
36 mg
Device
80 mg
Resource Breakdown
JavaScript
20.3 KB
Images
1008.3 KB
CSS
127.9 KB
HTML
52.5 KB
Green Hosting Not Verified
LRZ-MUNICH
4 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
D

Security Score

46%Poor
Interactive

HTTPS

No WAF

171d

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

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

20.10.2025

Valid Until

20.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (20)

wwwv18.lrz.debavarianquantum.desupercomputingcentres.orgsecincmgmt.sec.lrz.de.devweb.mwn.deelearning.lrz.deenviroinfo2023.eusite-logs.download.lrz.deenvicon.webdb.devweb.mwn.de+12 more

SHA-256 Fingerprint

00:DC:35:2A:0B:08:58:64:71:EE:0A:F5:A1:10:A9:3D:4B:AC:8C:41...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control
🟡 1 Hours(max-age=4613, no-transform)
connection
Keep-Alive
content-encoding
📦 Gzip(gzip)
content-language
de-DE
content-length
53432
content-type
text/html; charset=utf-8
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

65

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

postrelay1.lrz.de
postrelay2.lrz.de

Domain Information

lrz.de

Last Updated

11.04.2016

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.
B
76/100
Mobile Friendly14 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
1 recommendation
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

MixC5 + Open Sans

WCAG Partial
73/100
Readability
/30
20/30

20px · LH 1.40

Hierarchy
/20
19/20

2x ratio · ✓ H1→H6

WCAG
/25
16/25

1:1 min contrast

Performance
/25
18/25

2 fonts · 4 req

Heading Font

MixC5

Sans40px

Body Font

Open Sans

Sans20px

Contrast Ratio

1:1

6 issues

Reading Comfort

~35 CPL

Narrow lines
40px
h1
40px
h2
28px
h3
20px
h4
20px
p

✅ Excellent readability: 20px body text is ideal for all devices.

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

❌ Very complex text: Flesch score 10/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 6 elements below WCAG AA threshold (min 1.0:1).

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

✅ Strong hierarchy: Headlines are 2.0x larger than body text.

Buy on MyFontsFlesch 10

Color Palette

14 unique colors
2.59:1 Fail Light
#ffffff
Background· 19.200000000000003%
#9fa0ac
Other· 6.1%
#75a3e1
Accent· 8.6%
#654e90
Secondary· 8%
#454a7d
Secondary· 8%
#6794d4
Accent· 7.3%
#202b44
Secondary· 7.1%
#203e74
Primary· 6.5%

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

2 Resources

1
Scripts
1
Styles
0
Async
0
Defer

Top Script Sources

local(1)

Website Identity

lrz.de

+4989358318800
Location detected: 🇩🇪 Germanyvia phone
de

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Last analyzed: 01 May 2026 at 23:09

Historical Analysis & Change Tracking