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herder-institut.de

https://herder-institut.de· First analyzed 21 May 2026· Updated 21 May 2026
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herder-institut.de
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Mobile

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Hosting Provider

Hetzner
hetzner.com

IP Address

116.203.15.247

Site Location

🇩🇪 Germanyvia tld

Server Location

🇩🇪 Nuremberg, Germany

ASN

AS24940

Organization

Hetzner

Server

Apache

Nameservers

ns104.ovh.net.dns104.ovh.net.

Performance

98

Core Web Vitals

Weight

First Contentful Paint
852 ms10%
Speed Index
1.1 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.1 MB
20 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Drupal

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

3 Technologies Detected

CSS Frameworks

1
Tailwind CSS

Analytics

1
Matomo

Web Servers

1
Apache

SEO Analysis

C69/100
22
6
1
Meta Tags4/15
Content10/12
Headings8/8
Technical19/25
E-E-A-T0/7
Images6/7
Links5/5
URL5/5
Social3/5
Freshness2/4
Mobile4/4
Indexability3/3
H
herder-institut.deherder-institut.de

Startseite | Herder-Institut

No description available for this page.

Title Length28 chars

Recommended: 50-60 chars (~164px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

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

7 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

615 URLs

robots.txt

53 rules

Local SEO

Local Search Readiness

7/100
Poor
2 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

D51/100
Bot Access
20/25
Machine Read.
13/25
Schema Data
0/25
Citation
18/25

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:2%
Words:956
Token eff.:Optimal
Sections/1K:6.3
Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary51w
Descriptive Headingsavg 5.9w
Canonical URL
Open Graph1/3
Twitter Card2/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (7)
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
85/100
13
Passed
1
Critical
0
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
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.
1 recommendation
  • •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.
74/100
B
113 mg
CO₂e / view
1.1 MB
Page Weight
70%
Cleaner Than
New Visitor
130 mg
vs
Returning (cached)
65 mg
Annual (10K/mo)
13.6 kg
Emission Segments
Data Center
6 mg
Network
33 mg
Device
75 mg
Resource Breakdown
JavaScript
67.4 KB
Images
398.5 KB
CSS
501.8 KB
HTML
154.9 KB
Green Hosting Verified
Hetzner Online GmbH
GWF Verified
2 recommendations
  • •Carbon footprint recommendation preview...
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A+

Security Score

93%Excellent
Static / Informational

HTTPS

No WAF

88d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

20.05.2026

Valid Until

18.08.2026

Subject Alternative Names (3)

herder-home-live-25.outermedia.infoherder-institut.dewww.herder-institut.de

SHA-256 Fingerprint

CD:32:47:30:AA:21:D9:8B:E9:04:E8:02:33:A2:BB:AD:3E:2A:2D:11...

Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

cache-control
🔴 No Cache(must-revalidate, no-cache, private)
content-encoding
📦 Gzip(gzip)
content-language
de
content-type
text/html; charset=UTF-8
date
Thu, 21 May 2026 13:08:57 GMT
expires
Sun, 19 Nov 1978 05:00:00 GMT
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

68

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (3)

c2111.mx.srv.dfn.de
b2111.mx.srv.dfn.de
a2111.mx.srv.dfn.de

Domain Information

herder-institut.de

Last Updated

30.06.2020

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
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.
C
67/100
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
3 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

TT Hoves + TT Norms

WCAG Partial
65/100
Readability
/30
17/30

20px · LH --

Hierarchy
/20
19/20

2.2x ratio · ✓ H1→H6

WCAG
/25
16/25

1:1 min contrast

Performance
/25
13/25

2 fonts · 5 req

Heading Font

TT Hoves

Sans44px

Body Font

TT Norms

Sans20px

Contrast Ratio

1:1

3 issues

Reading Comfort

~37 CPL

Narrow lines
44px
h1
37px
h2
30px
h3
20px
p

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

❌ Very complex text: Flesch score 4/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 3 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 2.2x larger than body text.

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

Buy on MyFontsFlesch 4

Color Palette

7 unique colors
6.49:1 AA Light
#ffffff
Background· 54.00000000000001%
#516257
Secondary· 6.1%
#00857f
Primary· 0%
#9eb8ad
Secondary· 6.8%
#6e948a
Secondary· 5.4%
#dcebec
Secondary· 4.6%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

2
Matomo (Piwik)Mid-Market
Google AnalyticsFree

User behavior and product analytics

1

Categories

2

Total Tools

0

Enterprise

1

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

6 Resources

4
Scripts
2
Styles
1
Async
1
Defer

Top Script Sources

local(2)piwik.outermedia.de(1)cdn.jsdelivr.net(1)

Website Identity

herder-institut.de

Location detected: 🇩🇪 Germanyvia tld
de

Sponsored

Last analyzed: 21 May 2026 at 15:39

Historical Analysis & Change Tracking