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o2.sk

https://o2.sk· First analyzed 16 May 2026· Updated 16 May 2026
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o2.sk
Desktop screenshot of o2.sk
Mobile screenshot of o2.sk
Mobile

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Hosting Provider

Eurotel Praha

IP Address

160.218.168.20

Site Location

🇸🇰 Slovakiavia tld

Server Location

🇨🇿 Lysá nad Labem, Czechia

ASN

AS5610

Organization

Eurotel Praha

Nameservers

ns2.tel.cz.dns.iol.cz.

Performance

97

Core Web Vitals

Weight

First Contentful Paint
1.0 s10%
Speed Index
1.3 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1 MB
108 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
BigCommerce

Progressive Web App

Web ManifestTheme Color

Technology Stack

12 Technologies Detected

UI Components

2
SwiperFancybox

CSS Frameworks

2
Tailwind CSS
Foundation

Analytics

2
Google Analytics
Google Analytics 4

Frameworks

1
Reactv16.12.0

Other

1
GSAPv3.13.0

Fonts

1
Google Fonts

Tag Managers

1
Google Tag Manager

Advertising

1
Google Ads

Customer Support

1
Zendesk

SEO Analysis

C67/100
20
7
1
Meta Tags13/15
Content8/12
Headings8/8
Technical18/25
E-E-A-T0/7
Images3/7
Links5/5
URL5/5
Social3/5
Freshness0/4
Mobile1/4
Indexability3/3
O
o2.sko2.sk

O2 | Mobilné telefóny, internet a volacie programy

Férový operátor O2 Slovensko. Vyberte si z ponuky výhodných volaní, dátových balíčkov, mobilných telefónov a tabletov v O2 E-shope. Kontrola spotreby, faktúr...

Description truncated.
Title Length50 chars

Recommended: 50-60 chars (~300px / 580px)

Description Length214 chars

Recommended: 120-160 chars

Issues (1)

  • • Most images missing alt text (17/26) — critical for accessibility and SEO

8 issues found

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Crawlability

Sitemap

Type: index

311 URLs

311 sub-sitemaps

robots.txt

4 rules

Sitemap reference found

Local SEO

Local Search Readiness

3/100
Poor
1 14 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

D44/100
Bot Access
20/25
Machine Read.
10/25
Schema Data
0/25
Citation
14/25

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:831
Token eff.:Optimal
Sections/1K:6

Structured Data

No Schema

Citation Readiness

Opening Summary25w
Descriptive Headingsavg 3.5w
Canonical URL
Open Graph3/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (11)
AI readiness recommendation preview...
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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.
B
77/100
13
Passed
4
Critical
0
Warnings
Images & Alt Text
10/20
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
11/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
11/15
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.
45/100
B
133 mg
CO₂e / view
1.0 MB
Page Weight
70%
Cleaner Than
New Visitor
152 mg
vs
Returning (cached)
76 mg
Annual (10K/mo)
15.9 kg
Emission Segments
Data Center
30 mg
Network
32 mg
Device
71 mg
Resource Breakdown
JavaScript
171.8 KB
Images
793.4 KB
CSS
30.0 KB
HTML
63.9 KB
Other
15.4 KB
Green Hosting Not Verified
Eurotel Praha
6 recommendations
  • •Carbon footprint recommendation preview...
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D

Security Score

41%Poor
Interactive

HTTPS

No WAF

40d

Certificate Details

Type

Extended Validation (EV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

26.06.2025

Valid Until

25.06.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

www.o2.sko2.sk

SHA-256 Fingerprint

67:5A:D7:BC:B0:EC:5E:90:3D:16:50:18:B8:13:43:02:83:1E:C9:D0...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control
🔴 No Cache(private, no-cache, no-store, must-revalidate)
cache-status
riil2sk;detail=no-cache
content-encoding
📦 Gzip(gzip)
content-type
text/html;charset=UTF-8
date
Sat, 16 May 2026 03:23:36 GMT
expires
Thu, 01 Jan 1970 00:00:00 GMT
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

68

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

smtp-in.o2.cz

Domain Information

o2.sk

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

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.
A
82/100
Mobile Friendly162 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
initial-scale=1.0, width=device-width
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

On Air Var + Times New Roman

WCAG AAA
78/100
Readability
/30
21/30

16px · LH --

Hierarchy
/20
20/20

3.62x ratio · ✓ H1→H6

WCAG
/25
22/25

9.4:1 min contrast

Performance
/25
15/25

2 fonts · 1 req

Heading Font

On Air Var

Sans58px

Body Font

Times New Roman

Serif16px

Contrast Ratio

9.4:1

WCAG AAA (≥7:1)

Reading Comfort

~37 CPL

Narrow lines
58px
h1
58px
h2
18px
h3
16px
h4
16px
p

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

⚠️ Hard to read: Flesch score 49/100. Simplify sentences for wider reach.

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 9.4:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 3.6x larger than body text.

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

Buy on MyFontsFluid Type (rem)Flesch 49

Color Palette

4 unique colors
Light
#ffffff
Background· 91.99999999999999%
#acabce
Secondary· 1.4%
#0050ff
Primary· 0%

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

30 Resources

20
Scripts
10
Styles
10
Async
3
Defer

Top Script Sources

o2static.sk(12)googletagmanager.com(4)local(2)scripts.luigisbox.tech(1)internetnadoma.o2.sk(1)

Website Identity

o2.sk

Location detected: 🇸🇰 Slovakiavia tld
sk-SK

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Last analyzed: 16 May 2026 at 03:23

Historical Analysis & Change Tracking