nuon.nl

https://nuon.nl· First analyzed 20 May 2026· Updated 20 May 2026

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nuon.nl

Mobile

Sponsored

Hosting Provider

Vattenfall Europe Information Services GmbH

IP Address

91.192.14.204

Site Location

🇳🇱 Netherlandsvia tld

Server Location

🇩🇪 Berlin, Germany

ASN

AS42274

Organization

Vattenfall Europe Information Services GmbH

CDN

Nameservers

ns1.vattenfall.se.ns2.ndc.nuon.com.ns2.vattenfall.se.ns1.ndc.nuon.com.+2 more

Performance

Core Web Vitals

Weight

First Contentful Paint

720 ms10%

Speed Index

936 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

3.6 MB

122 requests

Image Optimization

Responsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Ghost

Technology Stack

7 Technologies Detected

Icon Libraries

Font Awesome Material Icons

Analytics

Frameworks

CSS Frameworks

Other

SEO Analysis

C69/100

Meta Tags9/15

Content3/12

Headings6/8

Technical23/25

E-E-A-T2/7

Images4/7

Links5/5

URL5/5

Social5/5

Freshness0/4

Mobile4/4

Indexability3/3

nuon.nlnuon.nl

Energieleverancier Vattenfall – energie voor zo'n 2 miljoen klanten...

Energieleverancier Vattenfall levert energie aan zo'n 2 miljoen klanten in Nederland. Op deze manier streven we ernaar onze klimaatambitie te behalen.

Title truncated.

Title Length81 chars

Recommended: 50-60 chars (~476px / 580px)

Description Length150 chars

Recommended: 120-160 chars

Issues (2)

• Title is too long (81 chars, ~476px). Will be truncated in search results.
• Very thin content (11 words). Search engines need substantial content for ranking.

5 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

1,006 URLs

robots.txt

4 rules

Sitemap reference found

Local SEO

Local Search Readiness

23/100

Needs Work

6 14

Sponsored

AI & LLM Readiness

F37/100

Bot Access

20/25

Machine Read.

7/25

Schema Data

3/25

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:1%

Words:1,131

Token eff.:Optimal

Structured Data

1 JSON-LD

Organization×1.1

sameAs entity links

Citation Readiness

Opening Summary

Descriptive Headings

Canonical URL

Open Graph2/3

Twitter Card3/3

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.

68/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

6/20

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

1/15

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.

8/100

460 mg

CO₂e / view

3.6 MB

Page Weight

15%

Cleaner Than

New Visitor

525 mg

Returning (cached)

263 mg

Annual (10K/mo)

55.1 kg

Emission Segments

Data Center

103 mg

Network

110 mg

Device

247 mg

Resource Breakdown

JavaScript

41.3 KB

Images

2.6 MB

CSS

932.3 KB

HTML

56.4 KB

Green Hosting Not Verified

Vattenfall Europe Information Services GmbH

7 recommendations

•Carbon footprint recommendation preview...

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Security Score

61%Fair

Interactive

HTTPS

No WAF

177d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

13.05.2026

Valid Until

13.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

www.vattenfall.nl

SHA-256 Fingerprint

77:87:FE:D6:12:34:AB:E5:49:0F:74:7E:02:EE:B2:26:D6:4F:40:0D...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

content-security-policy-report-only

default-src 'self' https://*.svc.dynamics.com https://*.mkt....

content-type

text/html; charset=utf-8

date

Wed, 20 May 2026 02:32:47 GMT

referrer-policy

no-referrer

request-context

appId=cid-v1:583018e0-6761-4d16-878d-d1cd46aaabf2

strict-transport-security

max-age=31536000

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

mx04.totaal.net

Domain Information

nuon.nl

Domain Age

29y 9m

Created

13.08.1996

Last Updated

04.02.2026

Registrar

Ascio Technologies Inc

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Cookie consent banner detected

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.

67/100

Mobile Friendly49 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, shrink-to-fit=no

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Vattenfall Hall Display + Vattenfall Hall

WCAG AA

72/100

Readability

/30

20/30

16px · LH 1.70

Hierarchy

/20

15/20

2.75x ratio

WCAG

/25

22/25

5.13:1 min contrast

Performance

/25

15/25

2 fonts · 2 req

Heading Font

Vattenfall Hall Display

Sans44px

Body Font

Vattenfall Hall

Sans16px

Contrast Ratio

5.13:1

WCAG AA (≥4.5:1)

Reading Comfort

~36 CPL

Narrow lines

44px

56px

32px

16px

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

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 5.1:1).

⚠️ Minor heading issue: 0 level skip(s) detected. Maintain sequential order for screen readers.

✅ Strong hierarchy: Headlines are 2.8x larger than body text.

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

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

Buy on MyFonts

Color Palette

9 unique colors

3.63:1 AA Large Light

#ffffff

Background· 17.7%

#8a8588

Other· 8.9%

#1e314f

Secondary· 28.8%

#2172b6

Primary· 9.3%

#cbbfb8

Secondary· 4.7%

#354964

Secondary· 3.2%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

A/B Testing & Optimization

VWO (Visual Website Optimizer)Mid-Market

Experimentation and conversion optimization

Sponsored

Scripts & Styles

23 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(9)cdn.vattenfall.nl(4)tdn.r42tag.com(2)dev.visualwebsiteoptimizer.com(1)js.monitor.azure.com(1)

Website Identity

Vattenfall

Organization

Vattenfall Nederland, tot 2019 bekend als Nuon, is één van de grootste energieleveranciers van Nederland.

www.vattenfall.nl

29 years old

Postbus 40021, Arnhem

6803 HA, Arnhem

Location detected: 🇳🇱 Netherlandsvia tld

Ascio Technologies Incnl

Sponsored

Last analyzed: 20 May 2026 at 02:33

Historical Analysis & Change Tracking