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zib.de

https://zib.de· First analyzed 30 Apr 2026· Updated 30 Apr 2026
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zib.de
Desktop screenshot of zib.de
Mobile screenshot of zib.de
Mobile

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Hosting Provider

Konrad-Zuse-Zentrum fuer Informationstechnik Berlin

IP Address

130.73.131.153

Site Location

🇩🇪 Germanyvia tld

Server Location

🇩🇪 Berlin, Germany

ASN

AS680

Organization

Konrad-Zuse-Zentrum fuer Informationstechnik Berlin

Nameservers

dns-1.dfn.de.dns-3.dfn.de.ns1.zib.de.ns2.zib.de.+1 more

Performance

98

Core Web Vitals

Weight

First Contentful Paint
890 ms10%
Speed Index
1.2 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
10.9 MB
32 requests

Image Optimization

Lazy Load
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Drupal

Technology Stack

2 Technologies Detected

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

SEO Analysis

D59/100
18
9
1
Meta Tags4/15
Content12/12
Headings6/8
Technical15/25
E-E-A-T0/7
Images3/7
Links5/5
URL5/5
Social0/5
Freshness2/4
Mobile4/4
Indexability3/3
Z
zib.dezib.de

Home | zib.de

No description available for this page.

Title Length13 chars

Recommended: 50-60 chars (~76px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

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

10 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

1,534 URLs

robots.txt

53 rules

Local SEO

Local Search Readiness

6/100
Poor
2 13 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

D40/100
Bot Access
20/25
Machine Read.
9/25
Schema Data
0/25
Citation
11/25

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:1,126
Token eff.:Optimal
Sections/1K:17.8

Structured Data

No Schema

Citation Readiness

Opening Summary92w
Descriptive Headingsavg 3.8w
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...
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.
C
66/100
10
Passed
5
Critical
1
Warnings
Images & Alt Text
10/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
11/20
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
11/15
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.
31/100
F
1.38 g
CO₂e / view
10.9 MB
Page Weight
5%
Cleaner Than
New Visitor
1.58 g
vs
Returning (cached)
788 mg
Annual (10K/mo)
165.6 kg
Emission Segments
Data Center
308 mg
Network
331 mg
Device
740 mg
Resource Breakdown
JavaScript
63.2 KB
Images
10.8 MB
CSS
69.9 KB
HTML
14.0 KB
Green Hosting Not Verified
Konrad-Zuse-Zentrum fuer Informationstechnik Berlin
5 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
C

Security Score

66%Fair
Interactive

HTTPS

No WAF

195d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

ECDSA (secp384r1) (384 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

26.04.2026

Valid Until

11.11.2026

Subject Alternative Names (2)

www.zib.dezib.de

SHA-256 Fingerprint

5D:E6:6D:C9:94:07:98:73:2C:A3:59:C1:56:65:2E:C4:DF:66:E0:D1...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

access-control-allow-origin
https://vr-easy.com/
cache-control
🟡 1 Hours(max-age=3600, public)
content-encoding
📦 Gzip(gzip)
content-language
en
content-type
text/html; charset=UTF-8
date
Thu, 30 Apr 2026 06:35:23 GMT
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

73

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (3)

mailer01.zib.de
mailer01-a.zib.de
mailer01-b.zib.de

Domain Information

zib.de

Last Updated

01.07.2024

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected

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
60/100
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...
Upgrade to view recommendations

Typography & Readability

NeuzeitGro W01 Bold + NeuzeitGroLig W01 Regular

WCAG Partial
57/100
Readability
/30
11/30

12px · LH 1.40

Hierarchy
/20
14/20

2.08x ratio

WCAG
/25
17/25

1:1 min contrast

Performance
/25
15/25

2 fonts · 2 req

Heading Font

NeuzeitGro W01 Bold

Sans25px

Body Font

NeuzeitGroLig W01 Regular

Sans12px

Contrast Ratio

1:1

2 issues

Reading Comfort

~81 CPL

Wide lines
25px
h1
16px
h2
30px
h3
12px
p
Major Third
Scale

❌ Critical: 12px body text is too small. Minimum 14px, recommend 16px+.

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

⚠️ Wide lines: ~81 chars/line. Use max-width: 65ch for comfortable reading.

❌ Very complex text: Flesch score 0/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 2 elements below WCAG AA threshold (min 1.0:1).

⚠️ Minor heading issue: 0 level skip(s) detected. Maintain sequential order for screen readers.

Buy on MyFontsFluid Type (rem)Flesch 0

Color Palette

15 unique colors
11.66:1 AAA Light
#f4f4f4
Background· 20.700000000000003%
#2e3333
Text· 6.2%
#0c0e03
Primary· 9%
#41484f
Secondary· 6.8%
#1a2018
Secondary· 6.4%
#8f9ba5
Secondary· 5.8%
#545f6a
Secondary· 5.7%
#c8b099
Secondary· 5.6%

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

3 Resources

1
Scripts
2
Styles
0
Async
0
Defer

Top Script Sources

local(1)

Website Identity

zib.de

Location detected: 🇩🇪 Germanyvia tld
en

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Last analyzed: 30 Apr 2026 at 06:35

Historical Analysis & Change Tracking