edu.nl

https://edu.nl· First analyzed 15 Jun 2026· Updated 15 Jun 2026

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edu.nl

Mobile

Sponsored

Hosting Provider

Surf B.V.

IP Address

145.97.20.10

Site Location

🇳🇱 Netherlandsvia tld

Server Location

🇳🇱 Heumen, The Netherlands

ASN

AS1103

Server

Apache

Nameservers

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

Performance

Core Web Vitals

Weight

First Contentful Paint

1.1 s10%

Speed Index

1.5 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

218 KB

12 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

Infrastructure

Hosting

Surf B.V.

Technology Stack

4 Technologies Detected

CSS Frameworks

Icon Libraries

Web Servers

SEO Analysis

D47/100

Meta Tags4/15

Content7/12

Headings6/8

Technical11/21

E-E-A-T0/7

Images4/7

Links3/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

edu.nledu.nl

edu.nl - Dé URL-shortener voor onderwijs en onderzoek met respect v...

No description available for this page.

Title truncated.

Title Length79 chars

Recommended: 50-60 chars (~484px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

• Title is too long (79 chars, ~484px). Will be truncated in search results.
• Missing meta description — important for click-through rates in SERPs

8 issues found

Upgrade to view details

Local SEO

Local Search Readiness

3/100

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

F32/100

Bot Access

20/25

Machine Read.

5/25

Schema Data

0/25

Citation

7/25

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

Text ratio:23%

Words:117

Token eff.:Too Short

Structured Data

No Schema

Citation Readiness

Opening Summary10w

Descriptive Headings

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...

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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.

76/100

Passed

Critical

Warnings

Images & Alt Text

20/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

16/20

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

1/15

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.

61/100

A+

27 mg

CO₂e / view

217.6 KB

Page Weight

95%

Cleaner Than

New Visitor

31 mg

Returning (cached)

15 mg

Annual (10K/mo)

3.2 kg

Emission Segments

Data Center

6 mg

Network

7 mg

Device

14 mg

Resource Breakdown

JavaScript

53.4 KB

Images

23.7 KB

CSS

139.0 KB

HTML

1.5 KB

Green Hosting Not Verified

Surf B.V.

3 recommendations

•Carbon footprint recommendation preview...

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Security Score

81%Very Good

Static / Informational

HTTPS

No WAF

122d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

RSA (3072 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

16.10.2025

Valid Until

16.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (3)

edu.nlwww.edu.nlnew.edu.nl

SHA-256 Fingerprint

C0:D6:B3:17:85:35:A1:99:FE:DB:CB:61:2D:86:B1:DD:E6:DA:BE:3E...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🟡 0s(max-age=0, must-revalidate, private)

connection

Upgrade, Keep-Alive

content-encoding

📦 Gzip(gzip)

content-length

1243

content-type

text/html; charset=UTF-8

date

Mon, 15 Jun 2026 16:54:01 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

Domain Information

edu.nl

Domain Age

21y 2m

Created

19.04.2005

Last Updated

31.03.2026

Registrar

SURF B.V.

DNSSEC

Not Enabled

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.

60/100

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, shrink-to-fit=no

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Nunito + -apple-system

WCAG Partial

78/100

Readability

/30

26/30

16px · LH 1.50

Hierarchy

/20

16/20

3.5x ratio · ✓ H1→H6

WCAG

/25

17/25

2.42:1 min contrast

Performance

/25

19/25

System fonts

Heading Font

Nunito

Sans56px

Body Font

-apple-system

Sans16px

Contrast Ratio

2.42:1

11 issues

Reading Comfort

~37 CPL

Narrow lines

56px

16px

✅ Excellent readability: 16px body text is ideal for all devices.

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

⚠️ Partial contrast: 11 elements below WCAG AA threshold (min 2.4:1).

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

✅ Strong hierarchy: Headlines are 3.5x larger than body text.

✅ System fonts: Zero font loading delay — best possible LCP impact.

Buy on MyFontsFlesch 55

Color Palette

7 unique colors

2.11:1 Fail Light

#bdbfc0

Other· 1.4%

#808184

Other· 1%

#f8f9fb

Primary· 91.6%

#5cb7d0

Primary· 1.6%

#98a5aa

Secondary· 1.6%

#c1dbe0

Secondary· 1.5%

#e6eaeb

Secondary· 1.3%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

8 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(5)

Website Identity

edu.nl

21 years old

Location detected: 🇳🇱 Netherlandsvia tld

SURF B.V.en

Sponsored

Last analyzed: 15 Jun 2026 at 16:54

Historical Analysis & Change Tracking