jongeriuslab.com

https://jongeriuslab.com· First analyzed 14 May 2026· Updated 14 May 2026

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jongeriuslab.com

Mobile

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Hosting Provider

Vimexx Shared

IP Address

185.104.29.152

Site Location

🇳🇱 Netherlandsvia ip

Server Location

🇳🇱 Amsterdam, The Netherlands

ASN

AS206281

Organization

Vimexx Shared

Server

Apache

Nameservers

ns.zxcs.nl.ns.zxcs.eu.ns.zxcs.be.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

562 ms10%

Speed Index

731 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

17.9 MB

184 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPress

cms

Diviv4.27.6Custom

by Elegant Themes

View Theme

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

9 Technologies Detected

Plugins

Libraries

CSS Frameworks

Icon Libraries

Fonts

Web Servers

Languages

SEO Analysis

D55/100

Meta Tags7/15

Content3/12

Headings1/8

Technical22/25

E-E-A-T0/7

Images4/7

Links2/5

URL5/5

Social3/5

Freshness4/4

Mobile1/4

Indexability3/3

jongeriuslab.comjongeriuslab.com

Home - Jongeriuslab - Jongeriuslab

No description available for this page.

Title Length34 chars

Recommended: 50-60 chars (~204px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (3)

• Missing meta description — important for click-through rates in SERPs
• Very thin content (26 words). Search engines need substantial content for ranking.
• Missing H1 tag — every page should have exactly one H1

12 issues found

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Crawlability

Sitemap

Type: index

9 URLs

9 sub-sitemaps

robots.txt

11 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

14/100

Poor

5 12 1

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

D41/100

Bot Access

20/25

Machine Read.

7/25

Schema Data

4/25

Citation

10/25

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:1%

Words:591

Token eff.:Optimal

Structured Data

3 JSON-LD

WebSiteBreadcrumbListSearchAction

Citation Readiness

Opening Summary

Descriptive Headingsavg 3w

Canonical URL

Open Graph1/3

Twitter Card1/3

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.

72/100

Passed

Critical

Warnings

Images & Alt Text

20/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

11/20

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

14/15

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

1/15

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.

34/100

1.85 g

CO₂e / view

17.9 MB

Page Weight

Cleaner Than

New Visitor

2.12 g

Returning (cached)

1.06 g

Annual (10K/mo)

222.5 kg

Emission Segments

Data Center

91 mg

Network

545 mg

Device

1.22 g

Resource Breakdown

JavaScript

219.4 KB

Images

17.5 MB

CSS

172.1 KB

HTML

38.7 KB

Other

331 B

Green Hosting Verified

Vimexx

GWF Verified

6 recommendations

•Carbon footprint recommendation preview...

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Security Score

71%Good

Static / Informational

HTTPS

No WAF

59d

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+H3

Valid From

14.04.2026

Valid Until

13.07.2026

Subject Alternative Names (3)

jongeriuslab.commail.jongeriuslab.comwww.jongeriuslab.com

SHA-256 Fingerprint

84:69:03:2F:2A:D2:11:26:0F:A2:8F:B4:A2:C5:00:B6:13:9A:E7:7E...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

alt-svc

h3=":443";ma=180;

content-encoding

📦 Gzip(gzip)

content-length

39278

content-type

text/html; charset=UTF-8

date

Thu, 14 May 2026 16:35:04 GMT

server

Apache

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

jongeriuslab-com.mail.protection.outlook.com

Domain Information

jongeriuslab.com

Domain Age

26y 3m

Created

30.01.2000

Expires

30.01.2027

Last Updated

31.01.2026

Registrar

Key-Systems GmbH

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Notice (WP)

Cookie Consent Banner

Cookie Notice (WP)

GDPR Indicators

Cookie consent banner detected

CMP: Cookie Notice (WP)

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.

55/100

Not Mobile Friendly43 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.

3 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Source Sans Pro + Courier Prime

WCAG Partial

59/100

Readability

/30

18/30

17px · LH 1.80

Hierarchy

/20

8/20

WCAG

/25

17/25

1:1 min contrast

Performance

/25

16/25

2 fonts · 7 req

Heading Font

Source Sans Pro

Sans

Body Font

Courier Prime

Sans17px

Contrast Ratio

1:1

20 issues

Reading Comfort

~36 CPL

Narrow lines

24px

17px

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

❌ Very complex text: Flesch score 0/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 20 elements below WCAG AA threshold (min 1.0:1).

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

✅ Lean font stack: 2 font families keeps load times fast.

✅ Smart font loading: font-display: swap prevents invisible text during load (FOIT).

Buy on MyFontsFlesch 0

Color Palette

12 unique colors

11.93:1 AAA Light

#ffffff

Primary· 26.6%

#3a3636

Text· 5.8%

#6d5e51

Secondary· 7.6%

#191212

Secondary· 6.2%

#614234

Secondary· 5.3%

#d6d4cb

Secondary· 5.3%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

19 Resources

Scripts

Styles

Async

Defer

Top Script Sources

jongeriuslab.com(11)

Website Identity

Home - Jongeriuslab - Jongeriuslab

Design Studio

jongeriuslab.com/

26 years old

Location detected: 🇳🇱 Netherlandsvia ip

Key-Systems GmbH📧 Microsoft 365nl-NL

Social Profiles

Facebook Instagram LinkedIn

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Last analyzed: 14 May 2026 at 16:35

Historical Analysis & Change Tracking