npoklassiek.nl

https://npoklassiek.nl· First analyzed 12 May 2026· Updated 12 May 2026

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npoklassiek.nl

Mobile

Sponsored

Hosting Provider

Publieke Omroep Nederland

IP Address

145.58.30.3

Site Location

🇳🇱 Netherlandsvia tld

Server Location

🇳🇱 Hilversum, Netherlands

ASN

AS25182

Server

Nginx

Nameservers

minnie.omroep.nl.robin.omroep.nl.june.npodns.net.jim.npodns.nl.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

474 ms10%

Speed Index

616 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

1.5 MB

147 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Hybrid

⚙️ SSR

Frontend

Framework

Next.js

Infrastructure

Hosting

Publieke Omroep Nederland

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

3 Technologies Detected

Meta Frameworks

Next.js

Other

D3.js

Web Servers

Nginx

SEO Analysis

C64/100

Meta Tags14/15

Content8/12

Headings3/8

Technical12/21

E-E-A-T0/7

Images4/7

Links5/5

URL5/5

Social4/5

Freshness2/4

Mobile4/4

Indexability3/3

npoklassiek.nlnpoklassiek.nl

Klassieke muziek luisteren - NPO Klassiek

Op de site van NPO Klassiek luister je online naar afspeellijsten en concerten met de mooiste klassieke muziek. Beluister jouw favoriete stukken.

Title Length41 chars

Recommended: 50-60 chars (~244px / 580px)

Description Length145 chars

Recommended: 120-160 chars

Issues (1)

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

9 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

99 URLs

99 sub-sitemaps

robots.txt

5 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

6/100

Poor

2 13 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

D46/100

Bot Access

20/25

Machine Read.

10/25

Schema Data

0/25

Citation

16/25

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:2%

Words:389

Token eff.:Optimal

Sections/1K:72

Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary67w

Descriptive Headingsavg 5.1w

Canonical URL

Open Graph3/3

Twitter Card1/3

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.

72/100

Passed

Critical

Warnings

Images & Alt Text

18/20

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

Semantic Structure

13/20

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

7/15

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.

47/100

187 mg

CO₂e / view

1.5 MB

Page Weight

60%

Cleaner Than

New Visitor

214 mg

Returning (cached)

107 mg

Annual (10K/mo)

22.5 kg

Emission Segments

Data Center

42 mg

Network

45 mg

Device

101 mg

Resource Breakdown

JavaScript

1.3 MB

Images

8.0 KB

CSS

111.0 KB

HTML

37.9 KB

Other

4.8 KB

Green Hosting Not Verified

Publieke Omroep Nederland

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

36%Critical

Interactive

HTTPS

No WAF

40d

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

24.03.2026

Valid Until

22.06.2026

Subject Alternative Names (1)

www.npoklassiek.nl

SHA-256 Fingerprint

41:4A:7B:7C:48:73:6C:C5:57:99:F1:49:7E:14:A4:4E:03:3F:6C:58...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🟡 5s(public, s-maxage=30, max-age=5)

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=utf-8

date

Tue, 12 May 2026 07:00:38 GMT

etag

"fjerxz344n3ho5"

server

nginx

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

npoklassiek-nl.mail.protection.outlook.com

Domain Information

npoklassiek.nl

Domain Age

6y 4m

Created

24.12.2019

Last Updated

25.01.2023

Registrar

NPO

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.

70/100

Mobile Friendly

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

NPO Nova Headline + NPO Nova Text

WCAG Partial

62/100

Readability

/30

18/30

18px · LH 1.22

Hierarchy

/20

8/20

WCAG

/25

16/25

2.96:1 min contrast

Performance

/25

20/25

2 fonts · 3 req

Heading Font

NPO Nova Headline

Sans

Body Font

NPO Nova Text

Sans18px

Contrast Ratio

2.96:1

11 issues

Reading Comfort

~38 CPL

Narrow lines

28px

25px

18px

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

⚠️ Tight line spacing (1.22). Increase to 1.4–1.6 for better readability.

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

⚠️ Partial contrast: 11 elements below WCAG AA threshold (min 3.0:1).

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

✅ Lean font stack: 2 font families keeps load times fast.

Buy on MyFontsFlesch 0

Color Palette

10 unique colors

12.15:1 AAA Light

#ffffff

Background· 35.400000000000006%

#373538

Other· 5.9%

#43000a

Primary· 16.2%

#9cc5df

Accent· 14.8%

#6e3566

Secondary· 7.1%

#200a13

Accent· 7%

#aabacb

Secondary· 4.1%

#d3d9df

Secondary· 2.9%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

21 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(18)ccm.npo.nl(1)cdn.dimml.io(1)

Website Identity

npoklassiek.nl

6 years old

Location detected: 🇳🇱 Netherlandsvia tld

NPO📧 Microsoft 365nl

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Last analyzed: 12 May 2026 at 07:01

Historical Analysis & Change Tracking