zeitgeschichte-online.de

https://zeitgeschichte-online.de· First analyzed 18 May 2026· Updated 18 May 2026

Export

Mobile

Sponsored

Hosting Provider

Leibniz-Zentrum fuer Zeithistorische Forschung Potsdam e.V.

IP Address

195.37.232.131

Site Location

🇩🇪 Germanyvia tld

Server Location

🇩🇪 Frankfurt am Main, Germany

ASN

AS680

Organization

Leibniz-Zentrum fuer Zeithistorische Forschung Potsdam e.V.

Server

Nginx

Nameservers

ns03.versatel.de.ns02.versatel.de.ns01.versatel.de.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

270 ms10%

Speed Index

351 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

14 KB

60 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Drupal

Technology Stack

4 Technologies Detected

CSS Frameworks

Icon Libraries

Analytics

Web Servers

SEO Analysis

C62/100

Meta Tags7/15

Content12/12

Headings3/8

Technical18/25

E-E-A-T0/7

Images5/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

zeitgeschichte-online.dezeitgeschichte-online.de

zeitgeschichte | online

Wir reflektieren den Umgang mit zeithistorischen Themen in der Öffentlichkeit und diskutieren die aktuelle Relevanz vergangener Ereignisse. Wir informieren ü...

Description truncated.

Title Length23 chars

Recommended: 50-60 chars (~131px / 580px)

Description Length337 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

robots.txt

53 rules

Local SEO

Local Search Readiness

5/100

Poor

1 14 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

Sponsored

AI & LLM Readiness

D42/100

Bot Access

20/25

Machine Read.

11/25

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

nav

Text ratio:13%

Words:1,977

Token eff.:Optimal

Sections/1K:24.8

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary15w

Descriptive Headingsavg 5.7w

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (9)

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.

77/100

Passed

Critical

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

12/15

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

8/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

4 recommendations

•Accessibility recommendation preview...

Upgrade to view recommendations

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.

62/100

A+

2 mg

CO₂e / view

13.9 KB

Page Weight

95%

Cleaner Than

New Visitor

2 mg

Returning (cached)

1 mg

Annual (10K/mo)

204 g

Emission Segments

Data Center

<0.001 g

Network

<0.001 g

Device

<0.001 g

Resource Breakdown

HTML

13.9 KB

Green Hosting Not Verified

Leibniz-Zentrum fuer Zeithistorische Forschung Potsdam e.V.

3 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

56%Poor

Interactive

HTTPS

No WAF

56d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

15.04.2026

Valid Until

14.07.2026

Subject Alternative Names (2)

www.zeitgeschichte-online.dezeitgeschichte-online.de

SHA-256 Fingerprint

C6:5D:BC:D5:BA:E6:7E:D0:E7:21:A6:80:1E:4E:83:C8:3F:6A:82:2A...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🔴 No Cache(must-revalidate, no-cache, private)

content-encoding

📦 Gzip(gzip)

content-language

content-type

text/html; charset=UTF-8

date

Mon, 18 May 2026 17:35:54 GMT

expires

Sun, 19 Nov 1978 05:00:00 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

mail.zeitgeschichte-online.de

Domain Information

zeitgeschichte-online.de

Last Updated

25.05.2009

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

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.

63/100

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

2 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Georgia + SourceSansPro

WCAG Partial

56/100

Readability

/30

20/30

28px · LH 1.25

Hierarchy

/20

8/20

WCAG

/25

13/25

1:1 min contrast

Performance

/25

15/25

2 fonts · 3 req

Heading Font

Georgia

Serif

Body Font

SourceSansPro

Sans28px

Contrast Ratio

1:1

17 issues

Reading Comfort

Serif Headlines + Sans Body

left aligned

40px

90px

24px

28px

Major Third

Scale

✅ Excellent readability: 28px body text is ideal for all devices.

⚠️ Tight line spacing (1.25). Increase to 1.4–1.6 for better readability.

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

⚠️ Partial contrast: 17 elements below WCAG AA threshold (min 1.0:1).

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

❌ Pure vw font sizes: Viewport units alone break browser zoom (WCAG 1.4.4 fail). Use clamp(rem, vw, rem).

Buy on MyFontsFlesch 0

Color Palette

6 unique colors

10:1 AAA Dark

#030303

Text· 5.3%

#b8b4ae

Other· 4.9%

#15120e

Primary· 55.6%

#2a221a

Secondary· 20.1%

#65594e

Secondary· 7.6%

#443930

Secondary· 6.5%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Matomo (Piwik)Mid-Market

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

4 Resources

Scripts

Styles

Async

Defer

Top Script Sources

analytics.zeitgeschichte-digital.de(1)local(1)

Website Identity

zeitgeschichte-online.de

Location detected: 🇩🇪 Germanyvia tld

Social Profiles

Instagram Bluesky

Sponsored

Last analyzed: 18 May 2026 at 17:36

Historical Analysis & Change Tracking