avl.nl

https://avl.nl· First analyzed 15 May 2026· Updated 15 May 2026

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avl.nl

Mobile

Sponsored

Hosting Provider

Transip B.V

IP Address

93.119.2.168

Site Location

🇳🇱 Netherlandsvia phone

Server Location

🇳🇱 Leiden, The Netherlands

ASN

AS20857

Organization

Transip B.V

Nameservers

ns2.as41887.eu.ns1.as41887.nl.ns4.as41887.it.ns3.as41887.io.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.3 s10%

Speed Index

1.7 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

1.6 MB

40 requests

Image Optimization

WebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Umbraco

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

7 Technologies Detected

Analytics

CSS Frameworks

Icon Libraries

Fonts

Tag Managers

SEO Analysis

C69/100

Meta Tags8/15

Content3/12

Headings8/8

Technical25/25

E-E-A-T2/7

Images3/7

Links5/5

URL5/5

Social1/5

Freshness2/4

Mobile4/4

Indexability3/3

avl.nlavl.nl

Antoni van Leeuwenhoek | AVL

Welkom bij het Antoni van Leeuwenhoek, het in kanker gespecialiseerde ziekenhuis en onderzoeksinstituut.

Title Length28 chars

Recommended: 50-60 chars (~172px / 580px)

Description Length104 chars

Recommended: 120-160 chars

Issues (1)

• Very thin content (5 words). Search engines need substantial content for ranking.

5 issues found

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Crawlability

Sitemap

Type: index

4 URLs

4 sub-sitemaps

robots.txt

4 rules

Sitemap reference found

Local SEO

Local Search Readiness

36/100

Needs Work

9 10

Sponsored

AI & LLM Readiness

F34/100

Bot Access

20/25

Machine Read.

7/25

Schema Data

2/25

Citation

5/25

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:528

Token eff.:Optimal

Structured Data

1 JSON-LD

Organization×1.1

Citation Readiness

Opening Summary

Descriptive Headings

Canonical URL

Open Graph1/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (12)

AI readiness recommendation preview...

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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.

66/100

Passed

Critical

Warnings

Images & Alt Text

10/20

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

Semantic Structure

20/20

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

7/15

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.

4 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.

57/100

169 mg

CO₂e / view

1.6 MB

Page Weight

60%

Cleaner Than

New Visitor

194 mg

Returning (cached)

97 mg

Annual (10K/mo)

20.3 kg

Emission Segments

Data Center

8 mg

Network

50 mg

Device

111 mg

Resource Breakdown

JavaScript

745.8 KB

Images

521.7 KB

CSS

374.3 KB

HTML

34.7 KB

Green Hosting Verified

Transip

GWF Verified

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

86%Very Good

Interactive

HTTPS

No WAF

166d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

29.10.2025

Valid Until

29.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (15)

avl.nlwww.avl.nlsharedcontent.avl.nllerenbijavl.nlwww.lerenbijavl.nlwerkenbijavl.nlwww.werkenbijavl.nlnietzonderjullie.nl+7 more

SHA-256 Fingerprint

64:04:A7:09:7D:C0:F4:54:D2:C2:9D:A1:D3:F1:1F:FE:1A:02:87:46...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

access-control-allow-headers

Origin, X-Requested-With, Content-Type, Accept

access-control-allow-methods

GET,POST,OPTIONS

content-encoding

📦 Gzip(gzip)

content-security-policy

child-src blob:; worker-src blob:; img-src * 'self' data: ht...

content-type

text/html; charset=utf-8

date

Fri, 15 May 2026 18:04:13 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (3)

vmx03.prolocation.net

vmx02.prolocation.nl

vmx01.prolocation.nl

Domain Information

avl.nl

Domain Age

23y 1m

Created

07.04.2003

Last Updated

16.08.2020

Registrar

Prolocation B.V.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Cookie consent banner detected

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.

81/100

Mobile Friendly9 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

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Outfit + Inter

WCAG AAA

83/100

Readability

/30

20/30

18px · LH 1.40

Hierarchy

/20

20/20

3.06x ratio · ✓ H1→H6

WCAG

/25

23/25

14.44:1 min contrast

Performance

/25

20/25

2 fonts · 2 req

Heading Font

Outfit

Sans55px

Body Font

Inter

Sans18px

Contrast Ratio

14.44:1

WCAG AAA (≥7:1)

Reading Comfort

~33 CPL

Narrow lines

55px

46px

26px

18px

✅ Excellent readability: 18px body text is ideal for all devices.

✅ Optimal line spacing: 1.40 ratio (ideal range 1.4–1.6).

❌ Very complex text: Flesch score 19/100. Consider shorter sentences and simpler words.

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 14.4:1).

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

✅ Strong hierarchy: Headlines are 3.1x larger than body text.

Buy on MyFontsFlesch 19

Color Palette

6 unique colors

Light

#ffffff

Background· 25.4%

#f0dbe2

Secondary· 52.49999999999999%

#9a0036

Primary· 0%

#a99598

Secondary· 7.5%

#773851

Secondary· 6.1%

#e7c4cf

Primary· 4.3%

#cfc3c5

Secondary· 4.3%

Business & Marketing Stack

3 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

Microsoft ClarityFree

User behavior and product analytics

Sponsored

Scripts & Styles

13 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(4)projects.elitechnology.com(2)googletagmanager.com(2)scripts.clarity.ms(1)clarity.ms(1)

Website Identity

Antoni van Leeuwenhoek

Organization

Het Antoni van Leeuwenhoek is hét in kanker gespecialiseerde ziekenhuis en onderzoeksinstituut. Sinds de oprichting in 1913 combineert het Antoni van Leeuwenhoek de zorg voor kankerpatiënten met grensverleggend onderzoek. Wij gaan voor de beste zorg voor elke patiënt. Want kanker, dat kan iedereen o

+31-20-512-9111

www.avl.nl/

23 years old

Plesmanlaan 1211066 CX Amsterdam

Location detected: 🇳🇱 Netherlandsvia phone

Prolocation B.V.nlEst. 1913

Social Profiles

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Last analyzed: 15 May 2026 at 18:04

Historical Analysis & Change Tracking