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arolsen-archives.org

https://arolsen-archives.org· First analyzed 01 May 2026· Updated 01 May 2026
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arolsen-archives.org
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Mobile

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Hosting Provider

Hetzner
hetzner.com

IP Address

78.46.148.194

Site Location

🇩🇪 Germanyvia ip

Server Location

🇩🇪 Nuremberg, Germany

ASN

AS24940

Organization

Hetzner

Server

Apache

Nameservers

ns3.second-ns.de.ns.second-ns.com.ns1.your-server.de.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
660 ms10%
Speed Index
858 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
4.2 MB
61 requests

Image Optimization

Lazy LoadWebPResponsiveBunny Optimizer
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
WordPress
cms

Technology Stack

7 Technologies Detected

Analytics

2
Google Analytics
Google Analytics 4

Plugins

2
WooCommerce
Yoast SEO

CSS Frameworks

1
Tailwind CSS

Tag Managers

1
Google Tag Manager

Web Servers

1
Apache

SEO Analysis

A86/100
28
4
1
Meta Tags14/15
Content8/12
Headings8/8
Technical25/25
E-E-A-T3/7
Images4/7
Links4/5
URL5/5
Social4/5
Freshness4/4
Mobile4/4
Indexability3/3
A
arolsen-archives.orgarolsen-archives.org

Arolsen Archives - International Center on Nazi Persecution

Unsere Projekte und Initiativen News, Events, Storys und Dossiers Arolsen Archives im Social Web Häufig gefragt

Title Length59 chars

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

Description Length111 chars

Recommended: 120-160 chars

Issues (1)

  • • Most images missing alt text (39/41) — critical for accessibility and SEO

5 issues found

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Crawlability

Sitemap

Type: index

4 URLs

4 sub-sitemaps

robots.txt

7 rules

Sitemap reference found

Local SEO

Local Search Readiness

21/100
Needs Work
6 12

Sponsored

AI & LLM Readiness

D51/100
Bot Access
20/25
Machine Read.
8/25
Schema Data
11/25
Citation
12/25

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:3%
Words:1,616
Token eff.:Optimal
Depth:1/5

Structured Data

5 JSON-LD
FAQPage×1.5Organization×1.1microdataWebSiteBreadcrumbListSearchAction

Citation Readiness

Opening Summary1241w
Descriptive Headings
Canonical URL
Open Graph3/3
Twitter Card1/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (10)
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+
95/100
18
Passed
1
Critical
0
Warnings
Images & Alt Text
18/20
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
15/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
12/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

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.
51/100
F
434 mg
CO₂e / view
4.2 MB
Page Weight
15%
Cleaner Than
New Visitor
496 mg
vs
Returning (cached)
248 mg
Annual (10K/mo)
52.1 kg
Emission Segments
Data Center
21 mg
Network
128 mg
Device
285 mg
Resource Breakdown
JavaScript
155.3 KB
Images
3.4 MB
CSS
128.6 KB
Fonts
228.1 KB
HTML
223.1 KB
Other
96.1 KB
Green Hosting Verified
Hetzner Online GmbH
GWF Verified
4 recommendations
  • •Carbon footprint recommendation preview...
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D

Security Score

56%Poor
Interactive

HTTPS

No WAF

281d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (3072 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

06.01.2026

Valid Until

06.02.2027

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.arolsen-archives.orgarolsen-archives.org

SHA-256 Fingerprint

19:93:1F:B5:2E:E5:06:A0:BA:61:34:5F:08:BD:7A:D4:0E:8D:87:30...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control
🟡 0s(max-age=0)
content-encoding
📦 Gzip(gzip)
content-type
text/html; charset=UTF-8
date
Fri, 01 May 2026 04:35:25 GMT
expires
Fri, 01 May 2026 04:35:25 GMT
server
Apache
Good Warning Issue

Email Infrastructure

Microsoft 365

Score

50

SPF
DKIM
DMARC

MX Records (3)

mx-a.secumail.de
mx-b.secumail.de
arolsenarchives-org01i.mail.protection.outlook.com

Domain Information

arolsen-archives.org

Domain Age
8y 6m

Created

03.11.2017

Expires

03.11.2026

Last Updated

18.12.2025

Registrar

Key-Systems GmbH

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

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.
A
86/100
Mobile Friendly33 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
1 recommendation
  • •Mobile compatibility recommendation preview...
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Typography & Readability

GTAmericaMono + GTAmerica

WCAG AA
83/100
Readability
/30
22/30

20px · LH 1.50

Hierarchy
/20
20/20

3x ratio · ✓ H1→H6

WCAG
/25
23/25

6.96:1 min contrast

Performance
/25
18/25

2 fonts · 6 req

Heading Font

GTAmericaMono

Mono60px

Body Font

GTAmerica

Sans20px

Contrast Ratio

6.96:1

WCAG AA (≥4.5:1)

Reading Comfort

~38 CPL

Narrow lines
60px
h1
48px
h2
20px
h3
20px
p

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

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

❌ Very complex text: Flesch score 17/100. Consider shorter sentences and simpler words.

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 7.0:1).

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

✅ Strong hierarchy: Headlines are 3.0x larger than body text.

Buy on MyFontsFluid Type (rem)Flesch 17

Color Palette

8 unique colors
Dark
#7d6e6c
Other· 5.7%
#000fa0
Primary· 61.1%
#1525a1
Accent· 11%
#a6cec7
Secondary· 5.7%
#2a2b66
Secondary· 4.4%
#3d3e70
Secondary· 3.8%
#4b5579
Secondary· 2.6%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

2
Google Tag ManagerFree
Google AnalyticsFree

User behavior and product analytics

1

Categories

2

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

17 Resources

12
Scripts
5
Styles
1
Async
8
Defer

Top Script Sources

arolsen-archives.org(10)5f3c395.ccm19.de(2)

Website Identity

Arolsen Archives - International Center on Nazi Persecution

International Center on Nazi Persecution

arolsen-archives.org/
8 years old
Location detected: 🇩🇪 Germanyvia ip
Key-Systems GmbH📧 Microsoft 365de-DE

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Last analyzed: 01 May 2026 at 04:35

Historical Analysis & Change Tracking