radia.cz

https://radia.cz· First analyzed 29 May 2026· Updated 29 May 2026

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radia.cz

Mobile

Sponsored

Hosting Provider

Vodafone Czech Republic

IP Address

31.30.148.14

Site Location

🇨🇿 Czech Republicvia tld

Server Location

🇨🇿 Prague, Czechia

ASN

AS16019

Organization

Vodafone Czech Republic

Server

Apache

Nameservers

ns1.radia.cz.ns2.lbox.cz.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

412 ms10%

Speed Index

536 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

863 KB

178 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Tailwind CSS

Infrastructure

Hosting

Vodafone Czech Republic

Progressive Web App

Service Worker

Technology Stack

11 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Facebook Pixel

Advertising

Google Ads Google AdSense Criteo

CSS Frameworks

Fonts

Tag Managers

Web Servers

Languages

SEO Analysis

D58/100

Meta Tags13/15

Content8/12

Headings3/8

Technical13/25

E-E-A-T0/7

Images4/7

Links5/5

URL5/5

Social1/5

Freshness0/4

Mobile3/4

Indexability3/3

radia.czradia.cz

Poslouchejte rádia online. Kdykoliv. Kdekoliv.

Radia.cz je hudební portál, který umožňuje poslech více než 100 FM a internetových rádií z ČR i SR všemožných hudebních žánrů na internetu pouze přes webový ...

Description truncated.

Title Length46 chars

Recommended: 50-60 chars (~261px / 580px)

Description Length187 chars

Recommended: 120-160 chars

Issues (1)

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

10 issues found

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Crawlability

Sitemap

robots.txt

1 rules

Allows all crawlers

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.

Sponsored

AI & LLM Readiness

F34/100

Bot Access

20/25

Machine Read.

7/25

Schema Data

0/25

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:2%

Words:433

Token eff.:Optimal

Structured Data

No Schema

Citation Readiness

Opening Summary178w

Descriptive Headingsavg 1.8w

Canonical URL

Open Graph1/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (12)

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

15/20

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

4/15

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

5 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.

39/100

107 mg

CO₂e / view

862.7 KB

Page Weight

80%

Cleaner Than

New Visitor

122 mg

Returning (cached)

61 mg

Annual (10K/mo)

12.8 kg

Emission Segments

Data Center

24 mg

Network

26 mg

Device

57 mg

Resource Breakdown

JavaScript

676.3 KB

Images

89.9 KB

CSS

85.6 KB

Fonts

1.1 KB

HTML

8.7 KB

Other

1.1 KB

Green Hosting Not Verified

Vodafone Czech Republic

6 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

38d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

07.04.2026

Valid Until

06.07.2026

Subject Alternative Names (2)

radia.czwww.radia.cz

SHA-256 Fingerprint

F2:2C:30:71:CF:07:97:1E:DB:EF:E9:27:FB:B3:4F:34:5A:09:F4:16...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

access-control-allow-credentials

true

access-control-allow-headers

Content-Type, Authorization, Preload, Fields, Cookie, X-gen,...

access-control-allow-methods

GET, OPTIONS, PATCH, POST, PUT, DELETE

access-control-expose-headers

Link, Set-Cookie

cache-control

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

content-encoding

📦 Gzip(gzip)

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

mail.impressionmedia.cz

Domain Information

radia.cz

Domain Age

28y 6m

Created

04.12.1997

Expires

20.10.2026

Last Updated

16.01.2023

Registrar

REG-TELE3

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

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.

68/100

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

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

-apple-system + Arial

WCAG Partial

53/100

Readability

/30

17/30

13px · LH 1.50

Hierarchy

/20

5/20

WCAG

/25

15/25

3.95:1 min contrast

Performance

/25

16/25

System fonts

Heading Font

-apple-system

Sans

Body Font

Arial

Sans13px

Contrast Ratio

3.95:1

19 issues

Reading Comfort

~50 CPL

Optimal (45–75)

24px

13px

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

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

✅ Optimal line length: ~50 chars/line (ideal 45–75 CPL).

⚠️ Hard to read: Flesch score 31/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 19 elements below WCAG AA threshold (min 4.0:1).

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

GGoogle FontsFluid TypeFlesch 31

Color Palette

9 unique colors

Light

#eeeeee

Background· 35.60000000000001%

#5e2db3

Primary· 7.7%

#ac1a5b

Accent· 4.2%

#6d44b9

Secondary· 3.9%

#7d1d8e

Accent· 3.6%

#9a8ca5

Secondary· 3.3%

Business & Marketing Stack

6 Tools Detected

Enterprise

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Google AdsEnterprise

Facebook PixelMid-Market

CriteoEnterprise

Ad platforms and retargeting pixels

Social Media

Facebook SDKFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

22 Resources

Scripts

Styles

Async

Defer

Top Script Sources

connect.facebook.net(5)googletagmanager.com(4)spir.hit.gemius.pl(3)local(2)static.criteo.net(1)

Website Identity

radia.cz

28 years old

Location detected: 🇨🇿 Czech Republicvia tld

REG-TELE3cs

Social Profiles

Facebook Instagram

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Last analyzed: 29 May 2026 at 18:49

Historical Analysis & Change Tracking