Back to Search
denhelder.nl favicon

denhelder.nl

https://denhelder.nl· First analyzed 30 May 2026· Updated 30 May 2026
Export
denhelder.nl
Desktop screenshot of denhelder.nl
Mobile screenshot of denhelder.nl
Mobile

Sponsored

Hosting Provider

Nl Roxit Prod

IP Address

37.200.85.24

Site Location

🇳🇱 Netherlandsvia tld

Server Location

🇳🇱 Amsterdam, The Netherlands

ASN

AS213208

Organization

Nl Roxit Prod

Nameservers

ns1.premium-dns.net.ns2.premium-dns.net.

Performance

86

Core Web Vitals

Weight

First Contentful Paint
1.7 s10%
Speed Index
2.2 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.1 MB
71 requests

Image Optimization

Lazy Load
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Nl Roxit Prod

Technology Stack

5 Technologies Detected

Libraries

1
jQueryv3.7.1

UI Components

1
Swiper

Other

1
Modernizr

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

SEO Analysis

C66/100
19
6
1
Meta Tags10/15
Content9/12
Headings8/8
Technical15/25
E-E-A-T0/7
Images2/7
Links5/5
URL5/5
Social5/5
Freshness0/4
Mobile4/4
Indexability3/3
D
denhelder.nldenhelder.nl

Onderwerpen - Gemeente Den Helder

Officiële website van gemeente Den Helder met informatie over onze diensten en het bestuur.

Title Length33 chars

Recommended: 50-60 chars (~213px / 580px)

Description Length91 chars

Recommended: 120-160 chars

Issues (1)

  • • Most images missing alt text (17/18) — critical for accessibility and SEO

7 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

1 URLs

1 sub-sitemaps

robots.txt

19 rules

Sitemap reference found

Local SEO

Local Search Readiness

11/100
Poor
3 12 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

Sponsored

AI & LLM Readiness

F39/100
Bot Access
20/25
Machine Read.
10/25
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:468
Token eff.:Optimal
Sections/1K:32.1

Structured Data

No Schema

Citation Readiness

Opening Summary10w
Descriptive Headingsavg 2.5w
Canonical URL
Open Graph2/3
Twitter Card3/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (12)
AI readiness recommendation preview...
Upgrade to view recommendations

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
81/100
13
Passed
2
Critical
1
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
18/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
12/15
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
7/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
2 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.
40/100
B
138 mg
CO₂e / view
1.1 MB
Page Weight
70%
Cleaner Than
New Visitor
158 mg
vs
Returning (cached)
79 mg
Annual (10K/mo)
16.6 kg
Emission Segments
Data Center
31 mg
Network
33 mg
Device
74 mg
Resource Breakdown
JavaScript
216.5 KB
Images
353.7 KB
CSS
440.0 KB
HTML
10.9 KB
Other
94.6 KB
Green Hosting Not Verified
Nl Roxit Prod
5 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
A

Security Score

81%Very Good
Interactive

HTTPS

No WAF

44d

Certificate Details

Type

Extended Validation (EV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

19.06.2025

Valid Until

13.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (4)

www.denhelder.nldenhelder.nlburgerloket.denhelder.nlondernemersloket.denhelder.nl

SHA-256 Fingerprint

95:7F:44:79:13:F7:CB:09:BC:2D:28:47:3C:60:D6:86:D4:3B:EA:8A...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations
Upgrade to view header details

HTTP Headers

Developer Console

connection
keep-alive
content-encoding
📦 Gzip(gzip)
content-security-policy
default-src 'self'; base-uri 'self'; img-src * data: https:/...
content-type
text/html;charset=UTF-8
date
Sat, 30 May 2026 17:27:33 GMT
referrer-policy
no-referrer
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

100

SPF
DKIM
DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

denhelder-nl.x-v1.mx.microsoft

Domain Information

denhelder.nl

Domain Age
28y 8m

Created

19.09.1997

Last Updated

24.06.2025

Registrar

Metaregistrar 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.
C
67/100
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, user-scalable=1
1 recommendation
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Open sans

WCAG Partial
71/100
Readability
/30
23/30

16px · LH 1.50

Hierarchy
/20
17/20

2.5x ratio · ✓ H1→H6

WCAG
/25
16/25

2.35:1 min contrast

Performance
/25
15/25

1 font · 1 req

Heading Font

Open sans

Sans40px

Body Font

Open sans

Sans16px

Contrast Ratio

2.35:1

1 issue

Reading Comfort

~43 CPL

Narrow lines
40px
h1
28px
h2
16px
h3
16px
p

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

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

❌ Very complex text: Flesch score 22/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 1 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 2.5x larger than body text.

Buy on MyFontsFlesch 22

Color Palette

11 unique colors
Light
#ffffff
Background· 51.1%
#a4b7cf
Primary· 11.8%
#6e89ae
Secondary· 8.9%
#304c48
Secondary· 5.9%
#90a3bb
Secondary· 5.3%
#746141
Secondary· 4.5%
#93907c
Secondary· 3.6%
#15353e
Secondary· 2.7%

Sponsored

Scripts & Styles

29 Resources

20
Scripts
9
Styles
2
Async
8
Defer

Top Script Sources

local(18)siteimproveanalytics.com(1)survey.roxit.nl(1)

Website Identity

denhelder.nl

28 years old
Location detected: 🇳🇱 Netherlandsvia tld
Metaregistrar B.V.nl

Sponsored

Last analyzed: 30 May 2026 at 17:27

Historical Analysis & Change Tracking

denhelder.nl Technology Stack - Built With jQuery, Swiper, Modernizr, Tailwind CSS, Font Awesome | StackOptic | StackOptic