besselvanderkolk.com

https://besselvanderkolk.com· First analyzed 13 May 2026· Updated 13 May 2026

Export

Mobile

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Hosting Provider

Cloudflare

cloudflare.com

IP Address

104.21.40.91

Site Location

🇺🇸 York, United Statesvia schema

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

pam.ns.cloudflare.com.paul.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

685 ms10%

Speed Index

890 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

4.9 MB

36 requests

Image Optimization

WebP

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Tailwind CSS

Infrastructure

Hosting

Cloudflare

CDN

Cloudflare

Technology Stack

12 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Facebook Pixel Fathom Analytics Fathom

Libraries

UI Components

CSS Frameworks

Fonts

Email Marketing

Payments

CDN

SEO Analysis

B77/100

Meta Tags9/15

Content11/12

Headings3/8

Technical24/25

E-E-A-T5/7

Images3/7

Links5/5

URL5/5

Social5/5

Freshness0/4

Mobile4/4

Indexability3/3

besselvanderkolk.combesselvanderkolk.com

Best-selling Trauma Research Author | Bessel van der Kolk, MD.

No description available for this page.

Title Length62 chars

Recommended: 50-60 chars (~372px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

• Missing meta description — important for click-through rates in SERPs
• Missing H1 tag — every page should have exactly one H1

5 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

3 URLs

3 sub-sitemaps

robots.txt

6 rules

Sitemap reference found

Local SEO

Local Search Readiness

47/100

Fair

11 11

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AI & LLM Readiness

D52/100

Bot Access

20/25

Machine Read.

11/25

Schema Data

5/25

Citation

16/25

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:17%

Words:1,596

Token eff.:Optimal

Sections/1K:9.4

Depth:2/5

Structured Data

4 JSON-LD

Person×1.3BreadcrumbList

sameAs entity links

Citation Readiness

Opening Summary35w

Descriptive Headingsavg 4.9w

Canonical URL

Open Graph2/3

Twitter Card2/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (7)

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.

69/100

Passed

Critical

Warnings

Images & Alt Text

10/20

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

Semantic Structure

13/20

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

9/15

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

ARIA & Roles

7/15

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.

28/100

504 mg

CO₂e / view

4.9 MB

Page Weight

15%

Cleaner Than

New Visitor

576 mg

Returning (cached)

288 mg

Annual (10K/mo)

60.5 kg

Emission Segments

Data Center

25 mg

Network

148 mg

Device

331 mg

Resource Breakdown

JavaScript

227.7 KB

Images

4.4 MB

CSS

206.6 KB

Fonts

1.2 KB

HTML

14.5 KB

Green Hosting Verified

Cloudflare

GWF Verified

8 recommendations

•Carbon footprint recommendation preview...

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Security Score

5%Critical

Critical / Transactional

HTTPS

WAF

50d

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

03.04.2026

Valid Until

02.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

besselvanderkolk.com*.besselvanderkolk.com

SHA-256 Fingerprint

A2:E6:D3:93:B8:3D:B3:A0:12:A0:52:39:15:D7:2C:47:94:CA:02:77...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400

cache-control

🔴 No Cache(no-store, no-cache, must-revalidate)

cf-cache-status

DYNAMIC

cf-ray🇦🇹 Vienna

9fae5ea91a84c223-VIE

content-encoding

zstd

content-type

text/html; charset=UTF-8

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (5)

alt1.aspmx.l.google.com

alt3.aspmx.l.google.com

alt4.aspmx.l.google.com

alt2.aspmx.l.google.com

+1 more

Domain Information

besselvanderkolk.com

Domain Age

14y 2m

Created

07.03.2012

Expires

07.03.2027

Last Updated

20.02.2026

Registrar

Domain.com - Network Solutions, LLC

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.

62/100

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

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Bebas Neue + Montserrat

WCAG Partial

66/100

Readability

/30

23/30

20px · LH 1.50

Hierarchy

/20

7/20

WCAG

/25

16/25

1:1 min contrast

Performance

/25

20/25

2 fonts · 1 req

Heading Font

Bebas Neue

Display

Body Font

Montserrat

Sans20px

Contrast Ratio

1:1

25 issues

Reading Comfort

~33 CPL

Narrow lines

64px

36px

30px

20px

✅ Excellent readability: 20px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

⚠️ Hard to read: Flesch score 31/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 25 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.

GGoogle FontsFlesch 31

Color Palette

14 unique colors

2.16:1 Fail Light

#807b76

Other· 8.7%

#babab9

Other· 4.2%

#151112

Primary· 11.600000000000001%

#081929

Accent· 9.2%

#153f63

Accent· 8.9%

#55453e

Secondary· 8.1%

#162b3f

Secondary· 7.6%

#866450

Secondary· 7.4%

Business & Marketing Stack

4 Tools Detected

Enterprise

Marketing Automation

MailchimpSMB

Email marketing and automation platforms

Behavior Analytics

Google AnalyticsFree

FathomSMB

User behavior and product analytics

Advertising

Facebook PixelMid-Market

Ad platforms and retargeting pixels

Sponsored

Scripts & Styles

15 Resources

Scripts

Styles

Async

Defer

Top Script Sources

connect.facebook.net(2)local(2)chimpstatic.com(1)cdn.usefathom.com(1)code.jquery.com(1)

Website Identity

Best-selling Trauma Research Author

Person

We craft winning websites for all different types of businesses. Revolutionize your biggest marketing asset, your website. Craft CMS Partner.

[email protected]

17177468682

www.besselvanderkolk.com/

14 years old

5 Grumbacher Rd, York

17406, York, PA

United States

Location detected: 🇺🇸 United States, Yorkvia schema

Domain.com - Network Solutions, LLC📧 Google WorkspaceenNaN

Social Profiles

Facebook Instagram YouTube

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Last analyzed: 13 May 2026 at 02:53

Historical Analysis & Change Tracking