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huygens-fokker.org

https://huygens-fokker.org· First analyzed 22 May 2026· Updated 22 May 2026
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huygens-fokker.org
Desktop screenshot of huygens-fokker.org
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Mobile

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Hosting Provider

Your Hosting B.V.

IP Address

185.37.70.64

Site Location

🇳🇱 Netherlandsvia ip

Server Location

🇳🇱 Zwolle, The Netherlands

ASN

AS48635

Server

Nginx

Nameservers

ns4.firstfind.nl.ns3.firstfind.nl.ns5.firstfind.net.

Performance

91

Core Web Vitals

Weight

First Contentful Paint
1.4 s10%
Speed Index
1.8 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.6 MB
67 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
WordPressv7.0
cms
Diviv4.27.6Custom
by Elegant Themes
View Theme

Progressive Web App

Web ManifestApple Touch Icon

Technology Stack

15 Technologies Detected

Plugins

5
WPML
Addons For Divi
Wp Grid Builder
WP Rocket
WPML

UI Components

2
Slick CarouselLightbox

Libraries

1
jQueryv3.7.1

CSS Frameworks

1
Tailwind CSS

Fonts

1
Google Fonts

Analytics

1
Google Analytics

Email Marketing

1
Mailchimp

Web Servers

1
Nginx

Languages

1
PHPv8.2.31

Customer Support

1
Zendesk

SEO Analysis

C63/100
19
8
2
Meta Tags9/15
Content10/12
Headings6/8
Technical20/25
E-E-A-T0/7
Images3/7
Links4/5
URL5/5
Social0/5
Freshness0/4
Mobile3/4
Indexability3/3
H
huygens-fokker.orghuygens-fokker.org

Huygens-Fokker | centrum voor microtonale muziek

No description available for this page.

Title Length48 chars

Recommended: 50-60 chars (~297px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

  • • Missing meta description — important for click-through rates in SERPs
  • • Most images missing alt text (9/15) — critical for accessibility and SEO

10 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

6 URLs

6 sub-sitemaps

robots.txt

7 rules

Local SEO

Local Search Readiness

15/100
Poor
5 11 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

F36/100
Bot Access
20/25
Machine Read.
7/25
Schema Data
0/25
Citation
9/25

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:7%
Words:2,286
Token eff.:Optimal

Structured Data

No Schema

Citation Readiness

Opening Summary101w
Descriptive Headingsavg 4.6w
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (12)
AI readiness recommendation preview...
Upgrade to view recommendations

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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.
B
76/100
12
Passed
4
Critical
2
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
15/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
10/15
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
11/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
5/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
3 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.
42/100
C
203 mg
CO₂e / view
1.6 MB
Page Weight
60%
Cleaner Than
New Visitor
232 mg
vs
Returning (cached)
116 mg
Annual (10K/mo)
24.4 kg
Emission Segments
Data Center
45 mg
Network
49 mg
Device
109 mg
Resource Breakdown
JavaScript
236.3 KB
Images
707.4 KB
CSS
658.5 KB
HTML
39.2 KB
Green Hosting Not Verified
Your Hosting B.V.
5 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

21%Critical
Interactive

HTTPS

No WAF

88d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

21.05.2026

Valid Until

19.08.2026

Subject Alternative Names (2)

huygens-fokker.orgwww.huygens-fokker.org

SHA-256 Fingerprint

92:06:EB:2B:D0:48:8B:0C:92:C6:C5:7C:BC:38:FE:9B:D2:62:19:BC...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control
🟡 0s(max-age=0)
content-encoding
📦 Gzip(gzip)
content-length
39879
content-type
text/html; charset=UTF-8
date
Fri, 22 May 2026 16:25:54 GMT
expires
Fri, 22 May 2026 16:25:54 GMT
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

75

SPF
DKIM
DMARC

MX Records (2)

primary.yourfilter.nl
fallback.yourfilter.nl

Domain Information

huygens-fokker.org

Domain Age
18y 8m

Created

21.09.2007

Expires

21.09.2026

Last Updated

05.11.2025

Registrar

Realtime Register B.V.

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

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.
D
58/100
Not Mobile Friendly42 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.
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Arial

WCAG Partial
62/100
Readability
/30
22/30

16px · LH 1.50

Hierarchy
/20
17/20

2.38x ratio

WCAG
/25
15/25

1.97:1 min contrast

Performance
/25
8/25

System fonts

Heading Font

Arial

Sans38px

Body Font

Arial

Sans16px

Contrast Ratio

1.97:1

26 issues

Reading Comfort

~69 CPL

Optimal (45–75)
38px
h1
26px
h2
26px
h3
12px
h4
16px
p

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

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

✅ Optimal line length: ~69 chars/line (ideal 45–75 CPL).

❌ Very complex text: Flesch score 18/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 26 elements below WCAG AA threshold (min 2.0:1).

⚠️ Minor heading issue: 0 level skip(s) detected. Maintain sequential order for screen readers.

Flesch 18

Color Palette

9 unique colors
Dark
#272727
Text· 28.700000000000003%
#fffff5
Primary· 22.2%
#70a4b4
Secondary· 11.5%
#e3be97
Accent· 10.8%
#9a8466
Secondary· 8.8%
#524130
Secondary· 7.5%
#acbebb
Secondary· 4.8%
#f8ecd7
Accent· 2.9%

Business & Marketing Stack

2 Tools Detected

Advanced

Marketing Automation

1
MailchimpSMB

Email marketing and automation platforms

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

2

Categories

2

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Well-developed marketing technology stack

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Scripts & Styles

26 Resources

16
Scripts
10
Styles
1
Async
1
Defer

Top Script Sources

huygens-fokker.org(15)googletagmanager.com(1)

Website Identity

huygens-fokker.org

info@huygens-fokker.org
18 years old
Location detected: 🇳🇱 Netherlandsvia ip
Realtime Register B.V.nl-NL

Social Profiles

FacebookInstagram

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Last analyzed: 22 May 2026 at 16:26

Historical Analysis & Change Tracking