boom.nl

https://boom.nl· First analyzed 30 Apr 2026· Updated 30 Apr 2026

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boom.nl

Mobile

Sponsored

Hosting Provider

Cyso Hosting B.V.

IP Address

37.46.138.39

Site Location

🇳🇱 Netherlandsvia tld

Server Location

🇳🇱 Amsterdam, The Netherlands

ASN

AS25151

Organization

Cyso Hosting B.V.

Server

Apache

Nameservers

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

Performance

Core Web Vitals

Weight

First Contentful Paint

1.2 s10%

Speed Index

1.6 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

1.6 MB

67 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

Infrastructure

Hosting

Cyso Hosting B.V.

Technology Stack

13 Technologies Detected

UI Components

Swiper Slick Carousel

CSS Frameworks

Analytics

Libraries

Icon Libraries

Fonts

Tag Managers

Web Servers

Languages

Customer Support

SEO Analysis

C65/100

Meta Tags8/15

Content11/12

Headings3/8

Technical20/25

E-E-A-T2/7

Images4/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

boom.nlboom.nl

Boom | Voor een beter begrip | Kwalitatief hoogwaardige en betrouwb...

De wereld om ons heen verandert continu. Met nog meer kennis. Vernieuwende standpunten. Bij Boom zorgen we voor een beter begrip voor iedereen. => ontdek ons...

Title truncated. Description truncated.

Title Length81 chars

Recommended: 50-60 chars (~496px / 580px)

Description Length165 chars

Recommended: 120-160 chars

Issues (2)

• Title is too long (81 chars, ~496px). Will be truncated in search results.
• Missing H1 tag — every page should have exactly one H1

8 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

30,495 URLs

robots.txt

2 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

19/100

Poor

5 12

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

Sponsored

AI & LLM Readiness

D42/100

Bot Access

20/25

Machine Read.

8/25

Schema Data

6/25

Citation

8/25

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:7%

Words:662

Token eff.:Optimal

Sections/1K:10.6

Depth:2/5

Structured Data

2 JSON-LD

Organization×1.1WebSiteSearchAction

Citation Readiness

Opening Summary67w

Descriptive Headingsavg 2w

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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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.

83/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

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

11/15

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.

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.

31/100

209 mg

CO₂e / view

1.6 MB

Page Weight

60%

Cleaner Than

New Visitor

238 mg

Returning (cached)

119 mg

Annual (10K/mo)

25.0 kg

Emission Segments

Data Center

47 mg

Network

50 mg

Device

112 mg

Resource Breakdown

JavaScript

120.6 KB

Images

1.3 MB

CSS

209.2 KB

Fonts

1.1 KB

HTML

11.1 KB

Green Hosting Not Verified

Cyso Hosting B.V.

6 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

163d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

17.09.2025

Valid Until

10.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.boom.nlboom.nl

SHA-256 Fingerprint

C9:2C:D5:4A:55:C8:04:A9:8D:44:B1:98:12:D8:4F:0F:9C:B6:39:FD...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

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

content-encoding

📦 Gzip(gzip)

content-length

11072

content-type

text/html; charset=UTF-8

date

Thu, 30 Apr 2026 16:43:40 GMT

expires

Thu, 19 Nov 1981 08:52:00 GMT

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

100

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

boom-nl.mail.protection.outlook.com

Domain Information

boom.nl

Domain Age

29y 11m

Created

29.05.1996

Last Updated

11.01.2024

Registrar

team.blue nl B.V.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

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.

64/100

Mobile Friendly3 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

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Arial

WCAG Partial

70/100

Readability

/30

23/30

16px · LH 1.38

Hierarchy

/20

8/20

WCAG

/25

18/25

3.54:1 min contrast

Performance

/25

21/25

System fonts

Heading Font

Arial

Sans

Body Font

Arial

Sans16px

Contrast Ratio

3.54:1

1 issue

Reading Comfort

~45 CPL

Optimal (45–75)

26px

16px

✅ Excellent readability: 16px body text is ideal for all devices.

⚠️ Tight line spacing (1.38). Increase to 1.4–1.6 for better readability.

✅ Optimal line length: ~45 chars/line (ideal 45–75 CPL).

⚠️ Hard to read: Flesch score 34/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 1 elements below WCAG AA threshold (min 3.5:1).

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

GGoogle FontsFluid TypeFlesch 35

Color Palette

8 unique colors

3.92:1 AA Large Light

#ffffff

Background· 32.3%

#77828d

Secondary· 7.3%

#d6ebf0

Primary· 29.5%

#b3bac2

Border· 7.7%

#ddcdcc

Secondary· 5.8%

#31353e

Secondary· 5.7%

#715856

Secondary· 5.4%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(11)googletagmanager.com(3)cdn.jsdelivr.net(2)cdn.cookiehub.eu(1)code.jquery.com(1)

Website Identity

Boom

Organization

www.boom.nl

29 years old

Location detected: 🇳🇱 Netherlandsvia tld

team.blue nl B.V.📧 Microsoft 365nl

Sponsored

Last analyzed: 30 Apr 2026 at 16:44

Historical Analysis & Change Tracking