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eon.cz

https://eon.cz· First analyzed 20 May 2026· Updated 20 May 2026
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eon.cz
Desktop screenshot of eon.cz
Mobile screenshot of eon.cz
Mobile

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Hosting Provider

Microsoft Azure
azure.microsoft.com

IP Address

40.68.150.206

Site Location

🇨🇿 Czech Republicvia tld

Server Location

🇳🇱 Amsterdam, Netherlands

ASN

AS8075

Organization

Microsoft Azure Cloud (westeurope)

CDN

CDN

Nameservers

names.dialtelecom.cz.ns.eon.cz.sns.dialtelecom.cz.

Performance

77

Core Web Vitals

Weight

First Contentful Paint
2.7 s10%
Speed Index
3.5 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1 MB
36 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Kentico

Progressive Web App

PWA ReadyWeb ManifestService WorkerApple Touch IconTheme Color

Technology Stack

4 Technologies Detected

Libraries

1
jQuery

CSS Frameworks

1
Tailwind CSS

Analytics

1
Google Analytics

Tag Managers

1
Google Tag Manager

SEO Analysis

A83/100
26
2
1
Meta Tags14/15
Content12/12
Headings7/8
Technical23/25
E-E-A-T2/7
Images3/7
Links5/5
URL5/5
Social5/5
Freshness0/4
Mobile4/4
Indexability3/3
E
eon.czeon.cz

E.ON se vyplatí – Vám i přírodě | E.ON

Získejte výhodné ceny energií od E.ONu. Už víc než 20 jsme spolehlivým dodavatelem elektřiny i plynu pro domácnosti, firmy i obce a města.

Title Length41 chars

Recommended: 50-60 chars (~251px / 580px)

Description Length139 chars

Recommended: 120-160 chars

Issues (1)

  • • Most images missing alt text (8/13) — critical for accessibility and SEO

3 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

1,460 URLs

robots.txt

10 rules

Sitemap reference found

Local SEO

Local Search Readiness

18/100
Poor
5 13

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

D50/100
Bot Access
20/25
Machine Read.
8/25
Schema Data
7/25
Citation
15/25

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
nav
Text ratio:4%
Words:1,147
Token eff.:Optimal
Sections/1K:0.9
Depth:1/5

Structured Data

3 JSON-LD
Organization×1.1WebSiteBreadcrumbListSearchAction

Citation Readiness

Opening Summary37w
Descriptive Headingsavg 4.3w
Canonical URL
Open Graph3/3
Twitter Card3/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (10)
AI readiness recommendation preview...
Upgrade to view recommendations

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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.
A
84/100
14
Passed
2
Critical
2
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
15/20
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
13/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
6/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
1 recommendation
  • •Accessibility recommendation preview...
Upgrade to view recommendations

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.
63/100
B
105 mg
CO₂e / view
1.0 MB
Page Weight
70%
Cleaner Than
New Visitor
120 mg
vs
Returning (cached)
60 mg
Annual (10K/mo)
12.6 kg
Emission Segments
Data Center
5 mg
Network
31 mg
Device
69 mg
Resource Breakdown
JavaScript
347.5 KB
Images
225.2 KB
CSS
178.2 KB
Fonts
70.0 KB
HTML
215.6 KB
Green Hosting Verified
Microsoft Azure
Provider Match
5 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
C

Security Score

66%Fair
Interactive

HTTPS

No WAF

239d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert Ireland Limited

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

15.01.2026

Valid Until

14.01.2027

OCSP Stapling

Enabled

Subject Alternative Names (1)

www.eon.cz

SHA-256 Fingerprint

AE:23:D8:79:9C:20:7B:D6:6B:8E:53:AD:31:4C:E2:C3:31:A8:38:0F...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

content-security-policy
frame-ancestors 'self' https://digitalninosice.cz https://ad...
content-type
text/html; charset=utf-8
date
Wed, 20 May 2026 09:31:02 GMT
request-context
appId=cid-v1:44f15982-1328-4ff4-80e3-6ce10f7fa1f2
strict-transport-security
max-age=31536000; includeSubDomains; preload
x-azure-ref
20260520T093102Z-r1756c5b488j4f67hC1SJC7t74000000050g0000000...
Good Warning Issue

Email Infrastructure

Microsoft 365

Score

98

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

eon-cz.mail.protection.outlook.com

Domain Information

eon.cz

Domain Age
25y 10m

Created

21.07.2000

Expires

21.07.2027

Last Updated

19.02.2025

Registrar

REG-GRANSY

DNSSEC
Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner
Cookiebot
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
CMP: Cookiebot
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.
C
69/100
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, shrink-to-fit=no
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

EonBrix

WCAG Partial
71/100
Readability
/30
21/30

18px · LH 1.33

Hierarchy
/20
17/20

4x ratio

WCAG
/25
17/25

1:1 min contrast

Performance
/25
16/25

1 font · 8 req

Heading Font

EonBrix

Sans72px

Body Font

EonBrix

Sans18px

Contrast Ratio

1:1

5 issues

Reading Comfort

~32 CPL

Narrow lines
72px
h1
32px
h2
20px
h4
18px
p

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

⚠️ Tight line spacing (1.33). Increase to 1.4–1.6 for better readability.

⚠️ Partial contrast: 5 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 4.0x larger than body text.

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

Buy on MyFontsFlesch 62

Color Palette

9 unique colors
2.54:1 Fail Light
#ffffff
Primary· 15.2%
#9da4a4
Other· 9.3%
#ea1b0b
Primary· 28.800000000000004%
#76655d
Secondary· 11.2%
#ddc1bd
Secondary· 10.3%
#59271a
Accent· 10%
#7ac5cc
Secondary· 10%
#f0ede8
Secondary· 4.4%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

2
Google Tag ManagerFree
Google AnalyticsFree

User behavior and product analytics

1

Categories

2

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

17 Resources

12
Scripts
5
Styles
4
Async
0
Defer

Top Script Sources

eon.cz(3)app.usercentrics.eu(2)client.smartform.cz(2)cdnjs.cloudflare.com(2)local(2)

Website Identity

E.ON

E.ON

Organization
www.eon.cz:443/
25 years old
Location detected: 🇨🇿 Czech Republicvia tld
REG-GRANSY📧 Microsoft 365cs-CZ

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Last analyzed: 20 May 2026 at 09:31

Historical Analysis & Change Tracking