erfelijkheid.nl

https://erfelijkheid.nl· First analyzed 12 May 2026· Updated 12 May 2026

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erfelijkheid.nl

Mobile

Sponsored

Hosting Provider

Hetzner

hetzner.com

IP Address

159.69.223.160

Site Location

🇳🇱 Netherlandsvia tld

Server Location

🇩🇪 Nuremberg, Germany

ASN

AS24940

Organization

Hetzner

Server

Nginx

Nameservers

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

Performance

Core Web Vitals

Weight

First Contentful Paint

1.1 s10%

Speed Index

1.4 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

1.9 MB

26 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Drupal

Technology Stack

8 Technologies Detected

CSS Frameworks

Analytics

Libraries

Icon Libraries

Web Servers

Languages

SEO Analysis

D59/100

Meta Tags4/15

Content10/12

Headings7/8

Technical18/25

E-E-A-T0/7

Images3/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

erfelijkheid.nlerfelijkheid.nl

Voorpagina | Erfelijkheid.nl

No description available for this page.

Title Length28 chars

Recommended: 50-60 chars (~158px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

• Missing meta description — important for click-through rates in SERPs

9 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

1 URLs

robots.txt

52 rules

Local SEO

Local Search Readiness

6/100

Poor

2 13 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

D40/100

Bot Access

20/25

Machine Read.

9/25

Schema Data

0/25

Citation

11/25

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

navheader/footer

Text ratio:8%

Words:321

Token eff.:Optimal

Sections/1K:6.2

Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary17w

Descriptive Headingsavg 9.5w

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

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.

70/100

Passed

Critical

Warnings

Images & Alt Text

10/20

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

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

9/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

9/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

3 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.

65/100

195 mg

CO₂e / view

1.9 MB

Page Weight

50%

Cleaner Than

New Visitor

223 mg

Returning (cached)

111 mg

Annual (10K/mo)

23.4 kg

Emission Segments

Data Center

10 mg

Network

57 mg

Device

128 mg

Resource Breakdown

JavaScript

50.9 KB

Images

1.8 MB

CSS

21.2 KB

HTML

6.1 KB

Green Hosting Verified

Hetzner Online GmbH

GWF Verified

3 recommendations

•Carbon footprint recommendation preview...

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Security Score

41%Poor

Interactive

HTTPS

No WAF

68d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

21.04.2026

Valid Until

20.07.2026

Subject Alternative Names (4)

erfelijkheid.nlerfocentrum.nlwww.erfelijkheid.nlwww.erfocentrum.nl

SHA-256 Fingerprint

47:39:CE:9A:83:8B:42:3A:0B:EB:18:E7:F9:EA:0E:D9:D2:1B:F9:96...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🟡 1 Hours(max-age=3600, public)

content-encoding

📦 Gzip(gzip)

content-language

content-type

text/html; charset=UTF-8

date

Tue, 12 May 2026 14:50:11 GMT

etag

"1778592893-gzip"

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

mail.erfelijkheid.nl

Domain Information

erfelijkheid.nl

Domain Age

26y 2m

Created

02.03.2000

Last Updated

04.11.2021

Registrar

team.blue nl B.V.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

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.

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

Typography & Readability

Arial

WCAG Partial

76/100

Readability

/30

26/30

17px · LH 1.45

Hierarchy

/20

12/20

2.82x ratio

WCAG

/25

17/25

2.33:1 min contrast

Performance

/25

21/25

System fonts

Heading Font

Arial

Sans48px

Body Font

Arial

Sans17px

Contrast Ratio

2.33:1

11 issues

Reading Comfort

~34 CPL

Narrow lines

48px

35px

17px

✅ Excellent readability: 17px body text is ideal for all devices.

✅ Optimal line spacing: 1.45 ratio (ideal range 1.4–1.6).

⚠️ Partial contrast: 11 elements below WCAG AA threshold (min 2.3:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

✅ Strong hierarchy: Headlines are 2.8x larger than body text.

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

Color Palette

10 unique colors

3.89:1 AA Large Light

#ffffff

Background· 51.5%

#80827a

Other· 5%

#52b5df

Primary· 13.299999999999999%

#f7e5a6

Accent· 8.9%

#e7d3af

Accent· 5.6%

#24a5b3

Accent· 4.2%

#3a4147

Secondary· 3.7%

#ede9d4

Secondary· 3.1%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

10 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(4)googletagmanager.com(2)

Website Identity

erfelijkheid.nl

26 years old

Location detected: 🇳🇱 Netherlandsvia tld

team.blue nl B.V.nl

Social Profiles

Instagram LinkedIn

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Last analyzed: 12 May 2026 at 14:50

Historical Analysis & Change Tracking