StackOptic
Back to Search
socialhistory.org favicon

socialhistory.org

https://socialhistory.org· First analyzed 12 May 2026· Updated 12 May 2026
Export
socialhistory.org
Desktop screenshot of socialhistory.org
Mobile screenshot of socialhistory.org
Mobile

Sponsored

Hosting Provider

Knaw

IP Address

195.169.88.174

Site Location

🇳🇱 Netherlandsvia phone

Server Location

🇳🇱 Amersfoort, Netherlands

ASN

AS1103

Organization

Knaw

Server

Nginx

Nameservers

ns0.socialhistoryservices.org.ns1.zurich.surf.net.ns1.surfnet.nl.

Performance

99

Core Web Vitals

Weight

First Contentful Paint
792 ms10%
Speed Index
1.0 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
669 KB
36 requests

Image Optimization

Lazy Load
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Ghost

Technology Stack

5 Technologies Detected

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

Fonts

1
Google Fonts

Analytics

1
Matomo

Web Servers

1
Nginx

SEO Analysis

C67/100
19
6
1
Meta Tags10/15
Content11/12
Headings8/8
Technical17/25
E-E-A-T0/7
Images3/7
Links5/5
URL5/5
Social1/5
Freshness0/4
Mobile4/4
Indexability3/3
S
socialhistory.orgsocialhistory.org

IISG | Internationaal Instituut voor Sociale Geschiedenis

No description available for this page.

Title Length57 chars

Recommended: 50-60 chars (~332px / 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
robots.txt

53 rules

Local SEO

Local Search Readiness

16/100
Poor
5 11 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
navheader/footer
Text ratio:5%
Words:545
Token eff.:Optimal
Sections/1K:18.3
Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary36w
Descriptive Headingsavg 2.1w
Canonical URL
Open Graph0/3
Twitter Card1/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (10)
AI readiness recommendation preview...
Upgrade to view recommendations

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.
A
87/100
14
Passed
2
Critical
0
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
17/20
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
11/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
1 recommendation
  • •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.
56/100
B
83 mg
CO₂e / view
669.5 KB
Page Weight
80%
Cleaner Than
New Visitor
95 mg
vs
Returning (cached)
47 mg
Annual (10K/mo)
9.9 kg
Emission Segments
Data Center
19 mg
Network
20 mg
Device
44 mg
Resource Breakdown
JavaScript
87.0 KB
Images
450.7 KB
CSS
116.7 KB
Fonts
956 B
HTML
14.1 KB
Green Hosting Not Verified
Knaw
2 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
D

Security Score

56%Poor
Interactive

HTTPS

No WAF

175d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

03.11.2025

Valid Until

03.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

iisg.amsterdam

SHA-256 Fingerprint

9E:DD:61:5A:06:89:A5:B3:D3:16:07:DE:99:2F:A6:DD:41:89:A5:30...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations
Upgrade to view header details

HTTP Headers

Developer Console

cache-control
🟡 1 Hours(max-age=3600, public)
content-encoding
📦 Gzip(gzip)
content-language
nl
content-type
text/html; charset=UTF-8
date
Tue, 12 May 2026 03:18:07 GMT
etag
"1778337304-gzip"
Good Warning Issue

Email Infrastructure

Microsoft 365

Score

73

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

socialhistory-org.mail.protection.outlook.com

Domain Information

socialhistory.org

Domain Age
16y 10m

Created

24.06.2009

Expires

24.06.2027

Last Updated

02.11.2025

Registrar

Hosting Concepts B.V. d/b/a Registrar.eu

DNSSEC
Not Enabled

Privacy & Compliance

Civic Cookie Control

Cookie Consent Banner
Civic Cookie Control
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
CMP: Civic Cookie Control
Privacy policy page linked

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
64/100
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

Roboto Slab

WCAG Partial
53/100
Readability
/30
16/30

15px · LH 1.80

Hierarchy
/20
19/20

2.13x ratio · ✓ H1→H6

WCAG
/25
9/25

1:1 min contrast

Performance
/25
9/25

3 fonts · 4 req

Heading Font

Roboto Slab

Sans32px

Body Font

Roboto Slab

Sans15px

Contrast Ratio

1:1

26 issues

Reading Comfort

~38 CPL

Narrow lines
32px
h1
26px
h2
24px
h3
15px
p

⚠️ Small text: 15px may strain on mobile. Use ≥16px for WCAG compliance.

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

⚠️ Partial contrast: 26 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 2.1x larger than body text.

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

GGoogle FontsFlesch 0

Color Palette

7 unique colors
Light
#ffffff
Background· 38%
#7aa1b9
Primary· 25.700000000000003%
#587f98
Secondary· 14.9%
#6d93ac
Secondary· 11.8%
#44647b
Primary· 3.3%
#dde2e4
Secondary· 3.2%
#92adbd
Secondary· 3.1%

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

Sponsored

Scripts & Styles

12 Resources

6
Scripts
6
Styles
2
Async
3
Defer

Top Script Sources

local(4)cdn.matomo.cloud(1)knaw.matomo.cloud(1)

Website Identity

socialhistory.org

ask@iisg.nl
+31206685866
16 years old
Location detected: 🇳🇱 Netherlandsvia phone
Hosting Concepts B.V. d/b/a Registrar.eu📧 Microsoft 365nl

Sponsored

Last analyzed: 12 May 2026 at 03:18

Historical Analysis & Change Tracking