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wissen.de

https://wissen.de· First analyzed 26 Apr 2026· Updated 26 Apr 2026
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wissen.de
Desktop screenshot of wissen.de
Mobile screenshot of wissen.de
Mobile

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Hosting Provider

Fastly, Inc.

IP Address

151.101.2.137

Site Location

🇩🇪 Germanyvia tld

Server Location

🇨🇦 Montreal, Canada

ASN

AS54113

Organization

Fastly, Inc.

CDN

Fastly

Nameservers

anycast1.irondns.net.anycast2.irondns.net.

Performance

97

Core Web Vitals

Weight

First Contentful Paint
981 ms10%
Speed Index
1.3 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.5 MB
46 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Tailwind CSS
CMS
Drupal
Infrastructure
Hosting
Fastly, Inc.
CDN
Fastly

Technology Stack

9 Technologies Detected

CSS Frameworks

2
Tailwind CSS
Ant Design

Analytics

2
Google Analytics
Matomo

Advertising

2
Google AdsGoogle AdSense

Frameworks

1
Alpine.js

Tag Managers

1
Google Tag Manager

Customer Support

1
Zendesk

SEO Analysis

B70/100
24
4
2
Meta Tags9/15
Content3/12
Headings8/8
Technical22/25
E-E-A-T3/7
Images5/7
Links5/5
URL5/5
Social3/5
Freshness0/4
Mobile4/4
Indexability3/3
W
wissen.dewissen.de

Allgemeinbildung | Wissenstest | Lexikon | Wörterbücher | Suche | w...

wissen.de ist das Wissensportal im deutschsprachigen Raum. Auf wissen.de finden Sie geprüfte Informationen. Kurz, knapp und präzise.

Title truncated.
Title Length75 chars

Recommended: 50-60 chars (~445px / 580px)

Description Length132 chars

Recommended: 120-160 chars

Issues (2)

  • • Title is too long (75 chars, ~445px). Will be truncated in search results.
  • • Very thin content (11 words). Search engines need substantial content for ranking.

6 issues found

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Crawlability

Sitemap

Type: index

7 URLs

7 sub-sitemaps

robots.txt

119 rules

Sitemap reference found

Local SEO

Local Search Readiness

12/100
Poor
3 13 1

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

D43/100
Bot Access
20/25
Machine Read.
13/25
Schema Data
2/25
Citation
8/25

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.txtvalid
llms-full.txt
Semantic HTML
Heading Hierarchy
Text ratio:4%
Words:2,576
Token eff.:Optimal

Structured Data

2 JSON-LD
WebSite

Citation Readiness

Opening Summary
Descriptive Headings
Canonical URL
Open Graph2/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (11)
AI readiness recommendation preview...
Upgrade to view recommendations

Sponsored

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
62/100
8
Passed
5
Critical
2
Warnings
Images & Alt Text
15/20
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
7/15
Verifies form fields have labels, error messages are clear, and inputs are properly associated.
Color & Contrast
12/15
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
6/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
4 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.
64/100
C
156 mg
CO₂e / view
1.5 MB
Page Weight
60%
Cleaner Than
New Visitor
179 mg
vs
Returning (cached)
89 mg
Annual (10K/mo)
18.7 kg
Emission Segments
Data Center
8 mg
Network
46 mg
Device
103 mg
Resource Breakdown
JavaScript
510.9 KB
Images
469.9 KB
CSS
481.0 KB
Fonts
56.0 KB
HTML
27.7 KB
Other
568 B
Green Hosting Verified
Fastly, Inc.
Provider Match
4 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
D

Security Score

56%Poor
Interactive

HTTPS

No WAF

177d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

GlobalSign nv-sa

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2+H3

Valid From

19.09.2025

Valid Until

21.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

www.wissen.de

SHA-256 Fingerprint

4A:2C:A0:2D:D4:D6:FC:10:3B:8D:98:2A:22:49:49:63:DF:8B:14:A0...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges
bytes
age
212445
alt-svc
h3=":443";ma=86400,h3-29=":443";ma=86400,h3-27=":443";ma=864...
cache-control
🔴 No Cache(no-store, no-cache, must-revalidate, max-age=0)
content-encoding
📦 Gzip(gzip)
content-language
de
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

20

SPF
DKIM
DMARC

MX Records (2)

mx2.mail.arvato-systems.de
mx1.mail.arvato-systems.de

Domain Information

wissen.de

Last Updated

23.01.2024

DNSSEC
Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner
OneTrust
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
CMP: OneTrust
Privacy policy page linked
Data Protection Officer mentioned

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 Friendly4 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, initial-scale=1.0
1 recommendation
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

IBM Plex Serif + IBM Plex Sans

WCAG AAA
81/100
Readability
/30
22/30

18px · LH 1.67

Hierarchy
/20
17/20

2.22x ratio · ✓ H1→H6

WCAG
/25
24/25

9.23:1 min contrast

Performance
/25
18/25

2 fonts · 5 req

Heading Font

IBM Plex Serif

Serif40px

Body Font

IBM Plex Sans

Sans18px

Contrast Ratio

9.23:1

WCAG AAA (≥7:1)

Reading Comfort

~39 CPL

Narrow lines
40px
h1
24px
h2
24px
h3
18px
p

✅ Excellent readability: 18px body text is ideal for all devices.

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 9.2:1).

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

✅ Strong hierarchy: Headlines are 2.2x larger than body text.

✅ Lean font stack: 2 font families keeps load times fast.

✅ Smart font loading: font-display: swap prevents invisible text during load (FOIT).

Buy on MyFonts

Color Palette

8 unique colors
5.13:1 AA Light
#acb0a3
Secondary· 7.8%
#3e3842
Secondary· 7.3%
#fafbfd
Background· 26.800000000000004%
#062d58
Primary· 16.1%
#e8ecf1
Secondary· 13.3%
#36526a
Secondary· 9.9%
#ae6b4e
Secondary· 9.6%
#796c64
Secondary· 9.2%

Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

3
Google Tag ManagerFree
Matomo (Piwik)Mid-Market
Google AnalyticsFree

User behavior and product analytics

Advertising

1
Google AdsEnterprise

Ad platforms and retargeting pixels

2

Categories

4

Total Tools

1

Enterprise

1

Mid-Market

Assessment: Well-developed marketing technology stack

Ad Networks

Google AdSenseGoogle Ad ManagerPubMaticPrebid.js

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Scripts & Styles

14 Resources

12
Scripts
2
Styles
6
Async
0
Defer

Top Script Sources

pagead2.googlesyndication.com(3)cdn.adspirit.de(2)statistik.konradin.de(1)googletagmanager.com(1)cdn.privacy-mgmt.com(1)

Website Identity

wissen.de

www.wissen.de/
Location detected: 🇩🇪 Germanyvia tld
de

Social Profiles

FacebookX (Twitter)

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Last analyzed: 26 Apr 2026 at 18:06

Historical Analysis & Change Tracking