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iss.nl

https://iss.nl· First analyzed 08 May 2026· Updated 08 May 2026
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iss.nl
Desktop screenshot of iss.nl
Mobile screenshot of iss.nl
Mobile

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Hosting Provider

Erasmus Universiteit Rotterdam

IP Address

145.5.1.13

Site Location

🇳🇱 Netherlandsvia tld

Server Location

🇳🇱 Amsterdam, The Netherlands

ASN

AS1103

Organization

Erasmus Universiteit Rotterdam

CDN

CDN

Nameservers

ns1.zurich.surf.net.ns3.surfnet.nl.ns2.surfnet.nl.ns1.surfnet.nl.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
589 ms10%
Speed Index
766 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.6 MB
48 requests

Image Optimization

Lazy LoadAVIFResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Erasmus Universiteit Rotterdam
CDN
CDN

Technology Stack

4 Technologies Detected

Libraries

1
jQuery

CSS Frameworks

1
Tailwind CSS

Analytics

1
Google Analytics 4

Tag Managers

1
Google Tag Manager

SEO Analysis

B72/100
22
5
1
Meta Tags9/15
Content10/12
Headings8/8
Technical19/25
E-E-A-T0/7
Images6/7
Links5/5
URL5/5
Social4/5
Freshness0/4
Mobile3/4
Indexability3/3
I
iss.nliss.nl

International Institute of Social Studies | Erasmus University Rott...

The International Institute of Social Studies is an international graduate school of policy-oriented critical social science: MA, PhD and research.

Title truncated.
Title Length72 chars

Recommended: 50-60 chars (~427px / 580px)

Description Length147 chars

Recommended: 120-160 chars

Issues (1)

  • • Title is too long (72 chars, ~427px). Will be truncated in search results.

6 issues found

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Crawlability

Sitemap

Type: index

4 URLs

4 sub-sitemaps

robots.txt

65 rules

Local SEO

Local Search Readiness

9/100
Poor
3 13 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

D41/100
Bot Access
20/25
Machine Read.
8/25
Schema Data
0/25
Citation
13/25

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:4%
Words:1,516
Token eff.:Optimal
Sections/1K:2.6
Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary786w
Descriptive Headingsavg 4.5w
Canonical URL
Open Graph3/3
Twitter Card3/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (11)
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
81/100
14
Passed
1
Critical
1
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
5/15
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
9/15
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.
49/100
C
197 mg
CO₂e / view
1.6 MB
Page Weight
60%
Cleaner Than
New Visitor
225 mg
vs
Returning (cached)
112 mg
Annual (10K/mo)
23.6 kg
Emission Segments
Data Center
44 mg
Network
47 mg
Device
105 mg
Resource Breakdown
JavaScript
135.0 KB
Images
1.3 MB
CSS
58.1 KB
Fonts
82.3 KB
HTML
28.2 KB
Green Hosting Not Verified
Erasmus Universiteit Rotterdam
4 recommendations
  • •Carbon footprint recommendation preview...
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A

Security Score

81%Very Good
Interactive

HTTPS

No WAF

181d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

20.04.2026

Valid Until

05.11.2026

Subject Alternative Names (19)

www.iss.nlwww.mastercitydeveloper.nlwww.eur.nltedxerasmusuniversity.orgstorybook.eur.nlrisbo.nlwww.ihs.nlwww.tedxerasmusuniversity.org+11 more

SHA-256 Fingerprint

BC:AE:F4:9E:01:33:EB:E6:7C:16:7A:4D:66:0B:8E:00:E3:AA:02:A0...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges
bytes
cache-control
🔵 1 Days(max-age=86400, public)
connection
keep-alive
content-encoding
📦 Gzip(gzip)
content-security-policy
frame-src 'self' https://eur.nl https://www.eur.nl https://s...
content-type
text/html; charset=UTF-8
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

98

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

iss-nl.s-v1.mx.microsoft

Domain Information

iss.nl

Domain Age
31y 4m

Created

20.12.1994

Last Updated

04.11.2025

Registrar

SURF B.V.

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
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.
A
80/100
Mobile Friendly25 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
2 recommendations
  • •Mobile compatibility recommendation preview...
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Typography & Readability

MuseoSans

WCAG AA
78/100
Readability
/30
18/30

14px · LH 1.50

Hierarchy
/20
20/20

2.86x ratio · ✓ H1→H6

WCAG
/25
22/25

4.97:1 min contrast

Performance
/25
18/25

1 font · 4 req

Heading Font

MuseoSans

Sans40px

Body Font

MuseoSans

Sans14px

Contrast Ratio

4.97:1

WCAG AA (≥4.5:1)

Reading Comfort

~41 CPL

Narrow lines
40px
h1
23px
h2
20px
h3
14px
p

⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

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

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

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 5.0:1).

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

✅ Strong hierarchy: Headlines are 2.9x larger than body text.

Buy on MyFontsFlesch 0

Color Palette

7 unique colors
Light
#ffffff
Background· 31.5%
#4c6569
Secondary· 27%
#da221d
Primary· 0%
#193031
Primary· 16.9%
#092025
Primary· 8.1%
#364646
Secondary· 6.4%
#aa312d
Accent· 3.3%

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

14 Resources

12
Scripts
2
Styles
4
Async
0
Defer

Top Script Sources

local(7)data.eur.nl(2)consent.studio(2)cdnjs.cloudflare.com(1)

Website Identity

iss.nl

31 years old
Location detected: 🇳🇱 Netherlandsvia tld
SURF B.V.en

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Last analyzed: 08 May 2026 at 09:11

Historical Analysis & Change Tracking