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cbg.nl

https://cbg.nl· First analyzed 20 May 2026· Updated 20 May 2026
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cbg.nl
Desktop screenshot of cbg.nl
Mobile screenshot of cbg.nl
Mobile

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Hosting Provider

Kinsta
cloudflare.com

IP Address

162.159.134.42

Site Location

🇳🇱 Netherlandsvia tld

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns1.savvii.nl.ns2.savvii.eu.ns3.savvii.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
538 ms10%
Speed Index
699 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.7 MB
74 requests

Image Optimization

WebPResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Tailwind CSS
CMS
WordPress
Infrastructure
Hosting
Kinsta
CDN
Cloudflare

Technology Stack

15 Technologies Detected

Plugins

6
Gravity Forms
Wp Smush Pro
Gravityformsrecaptcha
Yoast SEO
WP Rocket
Gravity Forms

Libraries

1
jQueryv3.6.0

UI Components

1
Swiper

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

Fonts

1
Google Fonts

Analytics

1
Google Analytics

Tag Managers

1
Google Tag Manager

CDN

1
Cloudflare

Security

1
reCAPTCHA

SEO Analysis

B76/100
20
8
1
Meta Tags11/15
Content10/12
Headings6/8
Technical24/25
E-E-A-T0/7
Images1/7
Links5/5
URL5/5
Social4/5
Freshness4/4
Mobile3/4
Indexability3/3
C
cbg.nlcbg.nl

CBG | Centrum voor familiegeschiedenis

Start het onderzoek naar je familiegeschiedenis! Het CBG|Centrum voor familiegeschiedenis is opgericht om het stamboomonderzoek en daarmee verbonden wetensch...

Description truncated.
Title Length38 chars

Recommended: 50-60 chars (~230px / 580px)

Description Length177 chars

Recommended: 120-160 chars

Issues (1)

  • • Most images missing alt text (13/20) — critical for accessibility and SEO

9 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

8 URLs

8 sub-sitemaps

robots.txt

4 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

20/100
Needs Work
6 10 1

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AI & LLM Readiness

D52/100
Bot Access
20/25
Machine Read.
11/25
Schema Data
4/25
Citation
17/25

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:5%
Words:1,570
Token eff.:Optimal
Sections/1K:6.4
Depth:1/5

Structured Data

3 JSON-LD
WebSiteBreadcrumbListSearchAction

Citation Readiness

Opening Summary69w
Descriptive Headingsavg 2.7w
Canonical URL
Open Graph2/3
Twitter Card1/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (9)
AI readiness recommendation preview...
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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+
91/100
15
Passed
2
Critical
0
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
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
15/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
11/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

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.
65/100
C
180 mg
CO₂e / view
1.7 MB
Page Weight
60%
Cleaner Than
New Visitor
206 mg
vs
Returning (cached)
103 mg
Annual (10K/mo)
21.6 kg
Emission Segments
Data Center
9 mg
Network
53 mg
Device
119 mg
Resource Breakdown
JavaScript
176.0 KB
Images
1.5 MB
CSS
98.0 KB
HTML
24.7 KB
Green Hosting Verified
Cloudflare
GWF Verified
3 recommendations
  • •Carbon footprint recommendation preview...
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A+

Security Score

91%Excellent
Interactive

HTTPS

WAF

39d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

30.03.2026

Valid Until

28.06.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

cbg.nl*.cbg.nl

SHA-256 Fingerprint

8F:14:DB:AB:D3:43:05:A3:5A:6A:16:04:2F:AC:29:30:84:6F:6F:68...

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HTTP Headers

Developer Console

age
612
alt-svc
h3=":443"; ma=86400
cache-control
🟡 0s(public, max-age=0, s-maxage=3600)
cf-cache-status
HIT
cf-ray🇫🇷 Paris
9fe7c6be6dac3a77-CDG
content-encoding
⚡ Brotli(br)
Good Warning Issue

Email Infrastructure

Microsoft 365

Score

95

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

cbg-nl.mail.eo.outlook.com

Domain Information

cbg.nl

Domain Age
30y 5m

Created

13.12.1995

Last Updated

10.05.2023

Registrar

Realtime Register

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.
B
78/100
Mobile Friendly16 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=1.0
3 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Outfit

WCAG Partial
67/100
Readability
/30
21/30

16px · LH 1.75

Hierarchy
/20
16/20

3x ratio

WCAG
/25
17/25

1:1 min contrast

Performance
/25
13/25

1 font · 4 req

Heading Font

Outfit

Sans48px

Body Font

Outfit

Sans16px

Contrast Ratio

1:1

2 issues

Reading Comfort

~34 CPL

Narrow lines
48px
h1
40px
h2
24px
h3
16px
p

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

⚠️ Hard to read: Flesch score 34/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 2 elements below WCAG AA threshold (min 1.0:1).

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

✅ Strong hierarchy: Headlines are 3.0x larger than body text.

⚠️ Fluid type without rem: clamp() detected but missing rem units. May fail WCAG 1.4.4 zoom test.

Buy on MyFontsFluid TypeFlesch 34

Color Palette

8 unique colors
17.76:1 AAA Light
#ffffff
Background· 30.6%
#181818
Text· 28.200000000000003%
#859c8a
Secondary· 11.8%
#323025
Secondary· 9.8%
#71343b
Secondary· 9.1%
#0b386d
Primary· 4.6%

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

2
Google Tag ManagerFree
Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

1
CookiebotMid-Market

Cookie consent and privacy compliance tools

2

Categories

3

Total Tools

0

Enterprise

1

Mid-Market

Assessment: Well-developed marketing technology stack

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Scripts & Styles

25 Resources

20
Scripts
5
Styles
4
Async
7
Defer

Top Script Sources

cbg.nl(13)consent.cookiebot.eu(2)gstatic.com(1)googletagmanager.com(1)google.com(1)

Website Identity

CBG | Centrum voor familiegeschiedenis

Start het onderzoek naar je familiegeschiedenis! Het CBG|Centrum voor familiegeschiedenis is opgericht om het stamboomonderzoek en daarmee verbonden wetenschappen te bevorderen.

service@cbg.nl
cbg.nl/
30 years old
Location detected: 🇳🇱 Netherlandsvia tld
Realtime Register📧 Microsoft 365nl-NL

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Last analyzed: 20 May 2026 at 02:05

Historical Analysis & Change Tracking