openmonumentendag.nl

https://openmonumentendag.nl· First analyzed 07 May 2026· Updated 07 May 2026

Export

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

188.114.96.3

Site Location

🇳🇱 Netherlandsvia tld

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

CloudFlare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

buck.ns.cloudflare.com.melody.ns.cloudflare.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

719 ms10%

Speed Index

935 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

7.9 MB

157 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPressv6.9.4

cms

Open Monumentendagv0.1Custom

by We Have A Plan

View Theme

Technology Stack

33 Technologies Detected

Analytics

Libraries

CSS Frameworks

Other

Icon Libraries

Fonts

Tag Managers

CDN

SEO Analysis

A83/100

Meta Tags14/15

Content10/12

Headings6/8

Technical24/25

E-E-A-T2/7

Images3/7

Links5/5

URL5/5

Social4/5

Freshness4/4

Mobile3/4

Indexability3/3

openmonumentendag.nlopenmonumentendag.nl

Bezoek gratis een monument - Open Monumentendag

Bezoek gratis een monument tijdens Open Monumentendag. Jaarlijks het tweede weekend van september. In 2025 op 13 en 14 september.

Title Length47 chars

Recommended: 50-60 chars (~303px / 580px)

Description Length129 chars

Recommended: 120-160 chars

Issues (1)

• Most images missing alt text (24/30) — critical for accessibility and SEO

7 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

11 URLs

11 sub-sitemaps

robots.txt

18 rules

Local SEO

Local Search Readiness

17/100

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

D57/100

Bot Access

20/25

Machine Read.

11/25

Schema Data

7/25

Citation

19/25

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:2%

Words:652

Token eff.:Optimal

Structured Data

4 JSON-LD

Organization×1.1WebSiteBreadcrumbListSearchAction

Citation Readiness

Opening Summary105w

Descriptive Headingsavg 6w

Canonical URL

Open Graph3/3

Twitter Card1/3

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.

76/100

Passed

Critical

Warnings

Images & Alt Text

10/20

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

Semantic Structure

18/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

12/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

14/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

13/15

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.

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.

32/100

817 mg

CO₂e / view

7.9 MB

Page Weight

Cleaner Than

New Visitor

934 mg

Returning (cached)

467 mg

Annual (10K/mo)

98.0 kg

Emission Segments

Data Center

40 mg

Network

240 mg

Device

537 mg

Resource Breakdown

JavaScript

723.4 KB

Images

6.5 MB

CSS

652.3 KB

Fonts

2.6 KB

HTML

48.8 KB

Other

55.3 KB

Green Hosting Verified

Cloudflare

GWF Verified

9 recommendations

•Carbon footprint recommendation preview...

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Security Score

26%Critical

Interactive

HTTPS

WAF

76d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

23.04.2026

Valid Until

22.07.2026

Subject Alternative Names (2)

*.openmonumentendag.nlopenmonumentendag.nl

SHA-256 Fingerprint

49:A2:CD:2C:EE:9E:A4:E2:30:94:08:FD:AB:28:41:5F:C4:EB:58:85...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400

cf-cache-status

DYNAMIC

cf-edge-cache

cache,platform=wordpress

cf-ray🇫🇷 Paris

9f7eafc4abbfd159-CDG

content-encoding

zstd

content-type

text/html; charset=UTF-8

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

openmonumentendag-nl.mail.protection.outlook.com

Domain Information

openmonumentendag.nl

Domain Age

27y 8m

Created

09.09.1998

Last Updated

23.02.2026

Registrar

Exonet B.V.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Notice (WP)

Cookie Consent Banner

Cookie Notice (WP)

GDPR Indicators

Cookie consent banner detected

CMP: Cookie Notice (WP)

Data Protection Officer 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.

81/100

Mobile Friendly37 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

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Open Sans

WCAG Partial

73/100

Readability

/30

25/30

17px · LH 1.50

Hierarchy

/20

19/20

2.35x ratio · ✓ H1→H6

WCAG

/25

18/25

1:1 min contrast

Performance

/25

11/25

1 font · 7 req

Heading Font

Open Sans

Sans40px

Body Font

Open Sans

Sans17px

Contrast Ratio

1:1

1 issue

Reading Comfort

~37 CPL

Narrow lines

40px

17px

Minor Second

Scale

✅ Excellent readability: 17px body text is ideal for all devices.

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

⚠️ Hard to read: Flesch score 32/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 1 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 2.4x larger than body text.

GGoogle FontsFlesch 32

Color Palette

11 unique colors

2.69:1 Fail Light

#9a9a9a

Other· 18.7%

#57544b

Other· 5.6%

#162350

Accent· 22.8%

#0c0907

Primary· 12.7%

#221b19

Secondary· 11.7%

#2e3b56

Secondary· 6.6%

#76785f

Secondary· 3.5%

#9c936b

Secondary· 0.6%

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

Ad platforms and retargeting pixels

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

openmonumentendag.nl(9)connect.facebook.net(3)gstatic.com(2)googletagmanager.com(2)youtube.com(1)

Website Identity