concertgebouworkest.nl

https://concertgebouworkest.nl· First analyzed 09 May 2026· Updated 09 May 2026

Export

Mobile

Sponsored

Hosting Provider

Exonet

IP Address

178.22.57.197

Site Location

🇳🇱 Netherlandsvia tld

Server Location

🇳🇱 Zevenaar, The Netherlands

ASN

AS12859

Server

Nginx

Nameservers

ns1.exonet.nl.ns3.exonet.eu.ns2.exonet.nl.

Performance

Core Web Vitals

Weight

First Contentful Paint

721 ms10%

Speed Index

937 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

3.3 MB

70 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Hybrid

⚙️ SSR

Frontend

Framework

Nuxt.js

Infrastructure

Hosting

Exonet

Progressive Web App

Web ManifestApple Touch Icon

Technology Stack

8 Technologies Detected

Analytics

Meta Frameworks

CSS Frameworks

Tag Managers

Web Servers

Libraries

SEO Analysis

C68/100

Meta Tags10/15

Content10/12

Headings7/8

Technical19/25

E-E-A-T0/7

Images3/7

Links5/5

URL5/5

Social1/5

Freshness2/4

Mobile3/4

Indexability3/3

concertgebouworkest.nlconcertgebouworkest.nl

Royal Concertgebouw Orchestra – World-class concerts

No description available for this page.

Title Length52 chars

Recommended: 50-60 chars (~324px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

• Missing meta description — important for click-through rates in SERPs

10 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

2,966 URLs

robots.txt

4 rules

Sitemap reference found

Local SEO

Local Search Readiness

10/100

Poor

3 13 2

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

Sponsored

AI & LLM Readiness

F28/100

Bot Access

20/25

Machine Read.

1/25

Schema Data

0/25

Citation

7/25

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

Text ratio:5%

Words:3,127

Token eff.:Poor Structure

Structured Data

No Schema

Citation Readiness

Opening Summary315w

Descriptive Headings

Canonical URL

Open Graph1/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (12)

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.

83/100

Passed

Critical

Warnings

Images & Alt Text

18/20

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

Semantic Structure

17/20

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

7/15

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.

47/100

346 mg

CO₂e / view

3.3 MB

Page Weight

15%

Cleaner Than

New Visitor

396 mg

Returning (cached)

198 mg

Annual (10K/mo)

41.5 kg

Emission Segments

Data Center

17 mg

Network

102 mg

Device

227 mg

Resource Breakdown

JavaScript

287.4 KB

Images

866.3 KB

CSS

2.2 MB

HTML

45.7 KB

Other

388 B

Green Hosting Verified

BIT

GWF Verified

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

18d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

27.02.2026

Valid Until

28.05.2026

Subject Alternative Names (2)

*.concertgebouworkest.nlconcertgebouworkest.nl

SHA-256 Fingerprint

CF:31:99:37:2C:A7:91:AF:56:E8:27:7B:11:42:1B:5D:AC:A7:78:F4...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

content-encoding

📦 Gzip(gzip)

content-type

text/html;charset=utf-8

date

Sat, 09 May 2026 13:56:19 GMT

server

nginx

vary

Accept-Encoding

x-powered-by

Nuxt

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

concertgebouworkest-nl.mail.protection.outlook.com

Domain Information

concertgebouworkest.nl

Domain Age

28y 4m

Created

12.01.1998

Last Updated

29.10.2020

Registrar

Exonet 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.

81/100

Mobile Friendly215 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

1 recommendation

•Mobile compatibility recommendation preview...

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Typography & Readability

Jokker

WCAG Partial

70/100

Readability

/30

18/30

16px · LH 1.20

Hierarchy

/20

17/20

4.8x ratio

WCAG

/25

17/25

1:1 min contrast

Performance

/25

18/25

2 fonts · 4 req

Heading Font

Jokker

Sans77px

Body Font

Jokker

Sans16px

Contrast Ratio

1:1

11 issues

Reading Comfort

Single Font Family

left aligned

77px

40px

33px

16px

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

⚠️ Tight line spacing (1.20). Increase to 1.4–1.6 for better readability.

⚠️ Partial contrast: 11 elements below WCAG AA threshold (min 1.0:1).

⚠️ Minor heading issue: 1 level skip(s) detected. Maintain sequential order for screen readers.

✅ Strong hierarchy: Headlines are 4.8x larger than body text.

✅ Modern fluid typography: clamp() with rem units ensures zoom accessibility (WCAG 1.4.4).

Buy on MyFontsFluid Type (rem)

Color Palette

6 unique colors

14.64:1 AAA Light

#ffffff

Background· 32.4%

#2b2826

Other· 6.6%

#080100

Primary· 43.49999999999999%

#1a1411

Secondary· 6.4%

#a8a294

Secondary· 4.9%

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

CookiebotMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

15 Resources

Scripts

Styles

Async

Defer

Top Script Sources

consent.cookiebot.com(2)googletagmanager.com(2)local(1)

Website Identity

concertgebouworkest.nl

28 years old

Location detected: 🇳🇱 Netherlandsvia tld

Exonet B.V.📧 Microsoft 365en-GB

Social Profiles

Facebook X (Twitter)Instagram LinkedIn

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Last analyzed: 09 May 2026 at 13:56

Historical Analysis & Change Tracking