blesk.cz

https://blesk.cz· First analyzed 25 Apr 2026· Updated 25 Apr 2026

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blesk.cz

Mobile

Sponsored

Hosting Provider

Ringier Slovakia Media s.r.o

IP Address

91.235.52.165

Site Location

🇨🇿 Prague, Czech Republicvia schema_nap

Server Location

🇸🇰 Bratislava, Slovakia

ASN

AS57788

Organization

Ringier Slovakia Media s.r.o

CDN

Cloudflare

WAF

Cloudflare

Nameservers

rick.ns.cloudflare.com.josephine.ns.cloudflare.com.

Performance

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%

404 KB

116 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Ghost

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

8 Technologies Detected

Analytics

Libraries

CSS Frameworks

Fonts

Tag Managers

Advertising

SEO Analysis

B70/100

Meta Tags12/15

Content8/12

Headings3/8

Technical18/25

E-E-A-T3/7

Images3/7

Links5/5

URL5/5

Social5/5

Freshness2/4

Mobile3/4

Indexability3/3

blesk.czblesk.cz

Blesk.cz - zprávy, celebrity, sport, zábava

Blesk je váš zpravodajský portál, který vám přináší nejen vše o celebritách, ale také události, zprávy ze sportu, rady nebo předpověď počasí Začtěte se do čl...

Description truncated.

Title Length43 chars

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

Description Length212 chars

Recommended: 120-160 chars

Issues (1)

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

10 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

47 URLs

47 sub-sitemaps

robots.txt

46 rules

Sitemap reference found

Local SEO

Local Search Readiness

28/100

Needs Work

8 12 1

Sponsored

AI & LLM Readiness

F37/100

Bot Access

20/25

Machine Read.

7/25

Schema Data

1/25

Citation

9/25

AI Bot Access

13/14 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:3%

Words:2,997

Token eff.:Optimal

Structured Data

1 JSON-LD

sameAs entity links

Citation Readiness

Opening Summary178w

Descriptive Headingsavg 1.3w

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...

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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.

77/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

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

11/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

8/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

3 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.

58/100

50 mg

CO₂e / view

404.0 KB

Page Weight

90%

Cleaner Than

New Visitor

57 mg

Returning (cached)

29 mg

Annual (10K/mo)

6.0 kg

Emission Segments

Data Center

11 mg

Network

12 mg

Device

27 mg

Resource Breakdown

JavaScript

251.3 KB

Images

37.0 KB

Fonts

2.2 KB

HTML

90.4 KB

Other

23.1 KB

Green Hosting Not Verified

Ringier Slovakia Media s.r.o

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

56%Poor

Interactive

HTTPS

No WAF

89d

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/1.1

Valid From

25.04.2026

Valid Until

24.07.2026

Subject Alternative Names (2)

*.blesk.czblesk.cz

SHA-256 Fingerprint

99:62:38:82:D8:7E:ED:3E:F7:D9:D8:B8:15:B4:BD:6E:49:28:61:CA...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-store, no-cache, must-revalidate)

content-encoding

📦 Gzip(gzip)

content-security-policy

upgrade-insecure-requests; default-src https: blob: wss: dat...

content-type

text/html; charset=UTF-8

date

Sat, 25 Apr 2026 10:43:06 GMT

expires

Thu, 19 Nov 1981 08:52:00 GMT

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

MX Records (7)

alt1.aspmx.l.google.com

alt2.aspmx.l.google.com

onlineweb.cncenter.cz

onlinedev.cncenter.cz

+3 more

Domain Information

blesk.cz

Domain Age

28y 7m

Created

06.09.1997

Expires

27.10.2026

Last Updated

16.11.2023

Registrar

REG-WEBGLOBE

DNSSEC

Not Enabled

Privacy & Compliance

Quantcast Choice

Cookie Consent Banner

Quantcast Choice

GDPR Indicators

Cookie consent banner detected

CMP: Quantcast Choice

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.

81/100

Mobile Friendly28 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=1.0

1 recommendation

•Mobile compatibility recommendation preview...

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Typography & Readability

tablet_gothic_condensed + Helvetica

WCAG Partial

51/100

Readability

/30

11/30

13px · LH 1.38

Hierarchy

/20

8/20

WCAG

/25

16/25

1.93:1 min contrast

Performance

/25

16/25

System fonts

Heading Font

tablet_gothic_condensed

Sans

Body Font

Helvetica

Sans13px

Contrast Ratio

1.93:1

1 issue

Reading Comfort

~42 CPL

Narrow lines

30px

16px

15px

13px

❌ Critical: 13px body text is too small. Minimum 14px, recommend 16px+.

⚠️ Tight line spacing (1.38). Increase to 1.4–1.6 for better readability.

⚠️ Hard to read: Flesch score 48/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 1 elements below WCAG AA threshold (min 1.9:1).

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

⚠️ Fluid type without rem: clamp() detected but missing rem units. May fail WCAG 1.4.4 zoom test.

GGoogle Fonts Buy on MyFontsFluid TypeFlesch 48

Color Palette

10 unique colors

6.33:1 AA Light

#ffffff

Background· 31.6%

#5c6065

Other· 5%

#e30613

Primary· 0%

#97040e

Accent· 8.2%

#432323

Secondary· 5.1%

#8f716f

Secondary· 5.1%

#8ab6cf

Secondary· 1.1%

Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

Ad platforms and retargeting pixels

Social Media

Facebook SDKFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

28 Resources

Scripts

Styles

Async

Defer

Top Script Sources

1076101160.rsc.cdn77.org(3)googletagmanager.com(2)cdn.cpex.cz(2)securepubads.g.doubleclick.net(2)blesk.cz(2)

Website Identity

Blesk.cz

NewsMediaOrganization

tip@blesk.cz

www.blesk.cz

28 years old

Marie Schmolková Square 3493/1, Prague

100 00, Prague

Location detected: 🇨🇿 Czech Republic, Praguevia schema_nap

REG-WEBGLOBE📧 Google Workspacecs

Social Profiles

Facebook X (Twitter)Instagram TikTok Telegram

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Last analyzed: 25 Apr 2026 at 10:43

Historical Analysis & Change Tracking