bjutijdschriften.nl

https://bjutijdschriften.nl· First analyzed 30 May 2026· Updated 30 May 2026

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bjutijdschriften.nl

Mobile

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Hosting Provider

Cyso Hosting B.V.

IP Address

37.46.138.50

Site Location

🇳🇱 Netherlandsvia tld

Server Location

🇳🇱 Amsterdam, The Netherlands

ASN

AS25151

Organization

Cyso Hosting B.V.

Nameservers

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

Performance

Core Web Vitals

Weight

First Contentful Paint

5.1 s10%

Speed Index

6.6 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

3.4 MB

83 requests

Image Optimization

Lazy LoadResponsiveVercel Image Optimization

0–49

50–89

90–100

Architecture Stack

Hybrid

🔀 Hybrid

Frontend

Framework

Next.js

Styling

Tailwind CSS

Infrastructure

Hosting

Cyso Hosting B.V.

CDN

Vercel Image

Technology Stack

8 Technologies Detected

CSS Frameworks

Analytics

Meta Frameworks

Icon Libraries

Fonts

Tag Managers

SEO Analysis

D57/100

Meta Tags5/15

Content10/12

Headings0/8

Technical15/25

E-E-A-T0/7

Images6/7

Links5/5

URL5/5

Social4/5

Freshness0/4

Mobile4/4

Indexability3/3

bjutijdschriften.nlbjutijdschriften.nl

Boomportaal

Boomportaal is het publicatieplatform van Boom uitgevers

Title Length11 chars

Recommended: 50-60 chars (~68px / 580px)

Description Length56 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag — every page should have exactly one H1

9 issues found

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Crawlability

Sitemap

Type: index

7 URLs

7 sub-sitemaps

robots.txt

95 rules

Sitemap reference found

Local SEO

Local Search Readiness

12/100

Poor

4 11 2

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

D47/100

Bot Access

20/25

Machine Read.

15/25

Schema Data

0/25

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

data-nosnippet

Machine Readability

llms.txtinvalid

llms-full.txt

Semantic HTML

Heading Hierarchy

nav

Text ratio:2%

Words:815

Token eff.:Optimal

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary41w

Descriptive Headings

Canonical URL

Open Graph3/3

Twitter Card2/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (8)

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.

68/100

Passed

Critical

Warnings

Images & Alt Text

18/20

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

Semantic Structure

12/20

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

9/15

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.

25/100

428 mg

CO₂e / view

3.4 MB

Page Weight

15%

Cleaner Than

New Visitor

489 mg

Returning (cached)

244 mg

Annual (10K/mo)

51.3 kg

Emission Segments

Data Center

96 mg

Network

103 mg

Device

230 mg

Resource Breakdown

JavaScript

3.1 MB

Images

207.9 KB

CSS

91.4 KB

HTML

33.6 KB

Other

1.2 KB

Green Hosting Not Verified

Cyso Hosting B.V.

6 recommendations

•Carbon footprint recommendation preview...

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Security Score

46%Poor

Interactive

HTTPS

No WAF

180d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

PerfectSSL

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

11.11.2025

Valid Until

26.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (12)

www.boomportaal.nltijdschriften.vakgebieden.rijks.boomportaal.nltijdschriften.rechtsgebieden.rijks.boomportaal.nltijdschriften.rechtsgebieden.boomportaal.nlboeken.vakgebieden.rijks.boomportaal.nlcms.boeken.vakgebieden.boomportaal.nlboeken.rechtsgebieden.rijks.boomportaal.nlboeken.vakgebieden.boomportaal.nl+4 more

SHA-256 Fingerprint

F6:C0:33:0C:F9:90:D1:2D:88:C3:10:42:47:88:7A:59:CF:7E:DE:6F...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

access-control-allow-credentials

true

access-control-allow-headers

access-control-allow-methods

GET, POST, PUT, PATCH, DELETE, OPTIONS

access-control-allow-origin

cache-control

🔴 No Cache(private, no-cache, no-store, max-age=0, must-revalidate)

content-encoding

📦 Gzip(gzip)

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

Domain Information

bjutijdschriften.nl

Domain Age

16y 4m

Created

26.01.2010

Last Updated

25.11.2021

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.

77/100

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

1 recommendation

•Mobile compatibility recommendation preview...

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Typography & Readability

Source Sans Pro

WCAG Partial

57/100

Readability

/30

15/30

13px · LH 1.50

Hierarchy

/20

9/20

WCAG

/25

17/25

2.22:1 min contrast

Performance

/25

16/25

1 font · 5 req

Heading Font

Source Sans Pro

Body Font

Source Sans Pro

Sans13px

Contrast Ratio

2.22:1

6 issues

Reading Comfort

~35 CPL

Narrow lines

13px

❌ Critical: 13px body text is too small. Minimum 14px, recommend 16px+.

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

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

⚠️ Partial contrast: 6 elements below WCAG AA threshold (min 2.2:1).

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

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

Buy on MyFontsFlesch 0

Color Palette

7 unique colors

4:1 AA Large Light

#7f7f7f

Other· 64.99999999999999%

#ffffff

Text· 10.7%

#0f0f1e

Primary· 6.9%

#3b2631

Secondary· 5.9%

#54696b

Secondary· 5.7%

#324b61

Secondary· 4.1%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

27 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(16)googletagmanager.com(3)cdn.cookiehub.eu(1)

Website Identity

bjutijdschriften.nl

[email protected]

088-0301000

16 years old

Location detected: 🇳🇱 Netherlandsvia tld

team.blue nl B.V.nl

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Last analyzed: 30 May 2026 at 13:06

Historical Analysis & Change Tracking