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u-centraal.nl

https://u-centraal.nl· First analyzed 02 Jun 2026· Updated 02 Jun 2026
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u-centraal.nl
Desktop screenshot of u-centraal.nl
Mobile screenshot of u-centraal.nl
Mobile

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Hosting Provider

Exonet

IP Address

178.22.56.113

Site Location

🇳🇱 Utrecht, Netherlandsvia schema_nap

Server Location

🇳🇱 Doetinchem, The Netherlands

ASN

AS12859

Server

Nginx

Nameservers

ns2.transip.eu.ns0.transip.net.ns1.transip.nl.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
549 ms10%
Speed Index
714 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.4 MB
103 requests

Image Optimization

Lazy LoadResponsiveVercel Image Optimization
0–49
50–89
90–100

Architecture Stack

Hybrid
🔀 Hybrid
Frontend
Framework
Next.js
Styling
Tailwind CSS
Infrastructure
Hosting
Exonet
CDN
Vercel Image

Technology Stack

5 Technologies Detected

Meta Frameworks

1
Next.js

CSS Frameworks

1
Tailwind CSS

Analytics

1
Matomo

Web Servers

1
Nginx

Security

1
reCAPTCHA

SEO Analysis

C67/100
20
7
2
Meta Tags4/15
Content10/12
Headings8/8
Technical22/25
E-E-A-T2/7
Images3/7
Links5/5
URL5/5
Social2/5
Freshness0/4
Mobile3/4
Indexability3/3
U
u-centraal.nlu-centraal.nl

Home | U Centraal

No description available for this page.

Title Length17 chars

Recommended: 50-60 chars (~103px / 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 (12/12) — critical for accessibility and SEO

9 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

116 URLs

robots.txt

3 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

31/100
Needs Work
9 11

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AI & LLM Readiness

D44/100
Bot Access
20/25
Machine Read.
7/25
Schema Data
2/25
Citation
15/25

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:2%
Words:1,673
Token eff.:Optimal
Sections/1K:1.8

Structured Data

1 JSON-LD
Organization×1.1

Citation Readiness

Opening Summary27w
Descriptive Headingsavg 3.3w
Canonical URL
Open Graph1/3
Twitter Card2/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (12)
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
82/100
14
Passed
2
Critical
3
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
11/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
4/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
2 recommendations
  • •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.
64/100
B
142 mg
CO₂e / view
1.4 MB
Page Weight
60%
Cleaner Than
New Visitor
162 mg
vs
Returning (cached)
81 mg
Annual (10K/mo)
17.0 kg
Emission Segments
Data Center
7 mg
Network
42 mg
Device
93 mg
Resource Breakdown
JavaScript
642.4 KB
Images
159.1 KB
CSS
19.8 KB
Fonts
299.1 KB
HTML
146.5 KB
Other
139.4 KB
Green Hosting Verified
BIT
GWF Verified
5 recommendations
  • •Carbon footprint recommendation preview...
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A

Security Score

86%Very Good
Interactive

HTTPS

No WAF

80d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

24.05.2026

Valid Until

22.08.2026

Subject Alternative Names (2)

u-centraal.nlwww.u-centraal.nl

SHA-256 Fingerprint

DD:88:2A:55:04:AE:AB:81:EA:D1:36:BF:31:67:96:B0:D9:68:09:55...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control
🔴 No Cache(private, no-cache, no-store, max-age=0, must-revalidate)
content-encoding
📦 Gzip(gzip)
content-security-policy
default-src 'self'; script-src 'self' 'unsafe-inline' 'unsaf...
content-type
text/html; charset=utf-8
date
Tue, 02 Jun 2026 16:09:24 GMT
link
</_next/static/media/5d52bd6c4cb3f315-s.p.610fd2a3.woff2>; r...
Good Warning Issue

Email Infrastructure

Microsoft 365

Score

100

SPF
DKIM
DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

ucentraal-nl0c.mail.protection.outlook.com

Domain Information

u-centraal.nl

Domain Age
13y 9m

Created

24.08.2012

Last Updated

16.06.2022

Registrar

team.blue nl B.V.

DNSSEC
Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner
Cookiebot
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
CMP: Cookiebot
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
85/100
Mobile Friendly4 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

Fredoka + Plus Jakarta Sans

WCAG Partial
71/100
Readability
/30
18/30

16px · LH 1.33

Hierarchy
/20
18/20

3.75x ratio · ✓ H1→H6

WCAG
/25
19/25

3.33:1 min contrast

Performance
/25
16/25

2 fonts · 7 req

Heading Font

Fredoka

Sans60px

Body Font

Plus Jakarta Sans

Sans16px

Contrast Ratio

3.33:1

2 issues

Reading Comfort

~37 CPL

Narrow lines
60px
h1
40px
h2
15px
h3
16px
p

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

⚠️ Tight line spacing (1.33). Increase to 1.4–1.6 for better readability.

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

⚠️ Partial contrast: 2 elements below WCAG AA threshold (min 3.3:1).

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

✅ Strong hierarchy: Headlines are 3.8x larger than body text.

Buy on MyFontsFlesch 18

Color Palette

5 unique colors
12.43:1 AAA Light
#f6f6f6
Background· 39.00000000000001%
#322e2c
Text· 8.4%
#231419
Primary· 12%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

1

Categories

1

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

22 Resources

20
Scripts
2
Styles
20
Async
1
Defer

Top Script Sources

local(17)stichting-pk.containers.piwik.pro(2)gstatic.com(1)

Website Identity

U Centraal

Organization

Wij zijn er voor inwoners van Utrecht met vragen en zorgen over geld en recht, wonen, (mantel)zorg, persoonlijke ontwikkeling of sociaal contact.

Mailto: [email protected]
Tel:030-2361770
www.u-centraal.nl
13 years old

Pieterskerkhof 16, Utrecht

3512 JR, Utrecht, Utrecht

NL

Location detected: 🇳🇱 Netherlands, Utrechtvia schema_nap
team.blue nl B.V.📧 Microsoft 365nl

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Last analyzed: 02 Jun 2026 at 16:09

Historical Analysis & Change Tracking