Het Trimbos-instituut is hét landelijk kennisinstituut voor mentale gezondheid, het gebruik van alcohol, tabak en drugs en over gamen, digitale balans en gok...

Description truncated.

Title Length43 chars

Recommended: 50-60 chars (~261px / 580px)

Description Length161 chars

Recommended: 120-160 chars

Issues (2)

• Very thin content (5 words). Search engines need substantial content for ranking.
• Most images missing alt text (36/52) — critical for accessibility and SEO

5 issues found

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Crawlability

Sitemap

Type: index

15 URLs

15 sub-sitemaps

robots.txt

18 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

20/100

Needs Work

6 11

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AI & LLM Readiness

D56/100

Bot Access

20/25

Machine Read.

11/25

Schema Data

13/25

Citation

12/25

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.txtinvalid

llms-full.txt

Semantic HTML

Heading Hierarchy

Text ratio:4%

Words:2,990

Token eff.:Optimal

Structured Data

7 JSON-LD

Article×1.2Person×1.3(min)Organization×1.1WebSiteBreadcrumbListSearchAction

sameAs entity links

Citation Readiness

Opening Summary

Descriptive Headings

Canonical URL

Open Graph3/3

Twitter Card1/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

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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.

73/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

8/20

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

11/15

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.

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.

48/100

121 mg

CO₂e / view

977.2 KB

Page Weight

70%

Cleaner Than

New Visitor

138 mg

Returning (cached)

69 mg

Annual (10K/mo)

14.5 kg

Emission Segments

Data Center

27 mg

Network

29 mg

Device

65 mg

Resource Breakdown

JavaScript

275.7 KB

Images

146.6 KB

CSS

490.2 KB

HTML

64.7 KB

Green Hosting Not Verified

Prolocation B.V.

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

56%Poor

Interactive

HTTPS

No WAF

85d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

22.07.2025

Valid Until

22.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (3)

trimbos.nlwww.trimbos.nllive1.trimbos.nl

SHA-256 Fingerprint

43:8D:2F:14:73:AB:1A:47:3D:BC:B7:03:51:5C:5F:ED:14:5C:66:B9...

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HTTP Headers

Developer Console

cache-control

🟡 0s(max-age=0)

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=UTF-8

date

Tue, 28 Apr 2026 05:51:44 GMT

expires

Tue, 28 Apr 2026 05:51:44 GMT

last-modified

Mon, 27 Apr 2026 21:17:06 GMT

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

trimbos-nl.mail.protection.outlook.com

Domain Information

trimbos.nl

Domain Age

29y 3m

Created

05.01.1997

Last Updated

23.04.2026

Registrar

BIT B.V.

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Data Protection Officer mentioned

Legitimate interest basis mentioned

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.

72/100

Mobile Friendly66 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

3 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

PT Sans

WCAG Partial

73/100

Readability

/30

21/30

18px · LH 1.67

Hierarchy

/20

20/20

2.67x ratio · ✓ H1→H6

WCAG

/25

16/25

1:1 min contrast

Performance

/25

16/25

1 font · 7 req

Heading Font

PT Sans

Sans48px

Body Font

PT Sans

Sans18px

Contrast Ratio

1:1

3 issues

Reading Comfort

~34 CPL

Narrow lines

48px

32px

18px

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

⚠️ Hard to read: Flesch score 38/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 3 elements below WCAG AA threshold (min 1.0:1).

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

✅ Strong hierarchy: Headlines are 2.7x larger than body text.

✅ Lean font stack: 1 font families keeps load times fast.

Buy on MyFontsFlesch 38

Color Palette

8 unique colors

18.29:1 AAA Light

#ffffff

Background· 34.3%

#151512

Secondary· 4.3%

#2b0009

Primary· 19.1%

#352929

Text· 7.3%

#252b45

Secondary· 1.3%

Business & Marketing Stack

4 Tools Detected

Enterprise

Marketing Automation

ActiveCampaignMid-Market

Email marketing and automation platforms

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

CookiebotMid-Market

Cookie consent and privacy compliance tools

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Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

trimbos.nl(14)googletagmanager.com(2)gstatic.com(1)consent.cookiebot.com(1)consentcdn.cookiebot.com(1)

Website Identity

Trimbos-instituut

Organization

Het Trimbos-instituut is hét landelijk kennisinstituut voor mentale gezondheid, het gebruik van alcohol, tabak en drugs en over gamen, digitale balans en gokken.

info@trimbos.nl

www.trimbos.nl/

29 years old

Location detected: 🇳🇱 Netherlandsvia tld

BIT B.V.📧 Microsoft 365nl-NL

Social Profiles

Facebook X (Twitter)Instagram LinkedIn YouTube

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Last analyzed: 28 Apr 2026 at 05:52

Historical Analysis & Change Tracking