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leibniz-lib.de

https://leibniz-lib.de· First analyzed 12 May 2026· Updated 12 May 2026
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leibniz-lib.de
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Mobile

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Hosting Provider

IONOS (1&1)
ionos.com

IP Address

194.164.58.145

Site Location

🇩🇪 Germanyvia phone

Server Location

🇩🇪 Berlin, Germany

ASN

AS8560

Organization

IONOS SE

Server

Apache

Nameservers

dns1.uni-bonn.de.unibn-dns.uni-koeln.de.dns3.uni-bonn.de.dns2.uni-bonn.de.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
521 ms10%
Speed Index
677 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
9.4 MB
40 requests

Image Optimization

Lazy LoadResponsiveThumbor
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
TYPO3

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

4 Technologies Detected

CSS Frameworks

1
Tailwind CSS

Analytics

1
Matomo

Web Servers

1
Apache

Languages

1
PHPv8.2.31

SEO Analysis

C68/100
20
8
1
Meta Tags14/15
Content10/12
Headings3/8
Technical19/25
E-E-A-T0/7
Images4/7
Links5/5
URL5/5
Social1/5
Freshness0/4
Mobile4/4
Indexability3/3
L
leibniz-lib.deleibniz-lib.de

Leibniz-Institut zur Analyse des Biodiversitätswandels | LIB

Innovative Forschung und öffentliche Bildung, um Lösungen für den Erhalt von Ökosystemen und Arten zu entwickeln.

Title Length60 chars

Recommended: 50-60 chars (~350px / 580px)

Description Length113 chars

Recommended: 120-160 chars

Issues (1)

  • • Missing H1 tag — every page should have exactly one H1

9 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

1 URLs

1 sub-sitemaps

robots.txt

10 rules

Sitemap reference found

Local SEO

Local Search Readiness

24/100
Needs Work
7 9 2

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AI & LLM Readiness

F30/100
Bot Access
20/25
Machine Read.
1/25
Schema Data
0/25
Citation
9/25

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:8%
Words:6,142
Token eff.:Excessive
Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary311w
Descriptive Headingsavg 1w
Canonical URL
Open Graph0/3
Twitter Card1/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (12)
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
78/100
12
Passed
4
Critical
1
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
13/20
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
6/15
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...
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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.
47/100
F
971 mg
CO₂e / view
9.4 MB
Page Weight
5%
Cleaner Than
New Visitor
1.11 g
vs
Returning (cached)
555 mg
Annual (10K/mo)
116.5 kg
Emission Segments
Data Center
48 mg
Network
285 mg
Device
638 mg
Resource Breakdown
JavaScript
269.2 KB
Images
426.7 KB
CSS
57.4 KB
Fonts
32.5 KB
HTML
73.1 KB
Other
8.5 MB
Green Hosting Verified
IONOS SE
GWF Verified
4 recommendations
  • •Carbon footprint recommendation preview...
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D

Security Score

51%Poor
Interactive

HTTPS

No WAF

32d

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/2

Valid From

15.03.2026

Valid Until

13.06.2026

Subject Alternative Names (17)

bonn.leibniz-lib.deevolutioneum.leibniz-lib.dehamburg.leibniz-lib.deleibniz-lib.demagazin.leibniz-lib.demuseum-koenig.demuseumkoenig.depatenterminal.leibniz-lib.de+9 more

SHA-256 Fingerprint

6D:51:E3:A1:BC:95:5E:49:BC:D2:40:7F:74:77:B8:39:42:4E:01:E2...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control
🔴 No Cache(private, no-store, max-age=0)
content-encoding
📦 Gzip(gzip)
content-language
de-DE
content-security-policy
default-src 'self'; script-src 'self' 'unsafe-inline' 'unsaf...
content-type
text/html; charset=utf-8
date
Tue, 12 May 2026 20:40:24 GMT
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

65

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (3)

esa3.rhrz.uni-bonn.de
esa2.rhrz.uni-bonn.de
esa1.rhrz.uni-bonn.de

Domain Information

leibniz-lib.de

Last Updated

20.05.2025

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
72/100
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=1.0
1 recommendation
  • •Mobile compatibility recommendation preview...
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Typography & Readability

Poppins

WCAG Partial
63/100
Readability
/30
22/30

24px · LH 1.60

Hierarchy
/20
8/20
WCAG
/25
15/25

1:1 min contrast

Performance
/25
18/25

1 font · 5 req

Heading Font

Poppins

Sans

Body Font

Poppins

Sans24px

Contrast Ratio

1:1

20 issues

Reading Comfort

~34 CPL

Narrow lines
60px
h2
36px
h3
24px
h4
24px
p

✅ Excellent readability: 24px body text is ideal for all devices.

✅ Optimal line spacing: 1.60 ratio (ideal range 1.4–1.6).

❌ Very complex text: Flesch score 14/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 20 elements below WCAG AA threshold (min 1.0:1).

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

⚠️ Fluid type without rem: clamp() detected but missing rem units. May fail WCAG 1.4.4 zoom test.

Buy on MyFontsFluid TypeFlesch 14

Color Palette

6 unique colors
7.93:1 AAA Light
#ffffff
Primary· 56.699999999999996%
#525058
Other· 4.4%

Business & Marketing Stack

2 Tools Detected

Advanced

Marketing Automation

1
Brevo (Sendinblue)SMB

Email marketing and automation platforms

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

2

Categories

2

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Well-developed marketing technology stack

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Scripts & Styles

8 Resources

5
Scripts
3
Styles
0
Async
1
Defer

Top Script Sources

local(4)sibforms.com(1)

Website Identity

leibniz-lib.de

+49 228 9122 0
Location detected: 🇩🇪 Germanyvia phone
de

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Last analyzed: 12 May 2026 at 20:40

Historical Analysis & Change Tracking