t4s.cz

https://t4s.cz· First analyzed 01 May 2026· Updated 01 May 2026

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t4s.cz

Mobile

Sponsored

Hosting Provider

Managed

IP Address

185.115.1.170

Site Location

🇨🇿 Czech Republicvia tld

Server Location

🇨🇿 Prague, Czechia

ASN

AS43541

Organization

Managed

Server

Nginx

Nameservers

ns1.regzone.de.ns1.regzone.info.ns1.regzone.cz.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.8 s10%

Speed Index

2.4 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Managed

Technology Stack

3 Technologies Detected

CSS Frameworks

Tailwind CSS

Web Servers

Nginxv1.24.0

Customer Support

Zendesk

SEO Analysis

F33/100

Meta Tags4/15

Content0/12

Headings6/8

Technical10/21

E-E-A-T0/7

Images1/7

Links0/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

t4s.czt4s.cz

top4sport.com

No description available for this page.

Title Length13 chars

Recommended: 50-60 chars (~81px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (3)

• Missing meta description — important for click-through rates in SERPs
• Very thin content (45 words). Search engines need substantial content for ranking.
• Most images missing alt text (2/2) — critical for accessibility and SEO

11 issues found

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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

F25/100

Bot Access

20/25

Machine Read.

1/25

Schema Data

0/25

Citation

4/25

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:0%

Words:44

Token eff.:Too Short

Structured Data

No Schema

Citation Readiness

Opening Summary19w

Descriptive Headings

Canonical URL

Open Graph0/3

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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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.

59/100

Passed

Critical

Warnings

Images & Alt Text

5/20

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

Semantic Structure

12/20

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.

59/100

74 mg

CO₂e / view

594.2 KB

Page Weight

80%

Cleaner Than

New Visitor

84 mg

Returning (cached)

42 mg

Annual (10K/mo)

8.8 kg

Emission Segments

Data Center

16 mg

Network

18 mg

Device

39 mg

Resource Breakdown

JavaScript

103.3 KB

Images

273.4 KB

CSS

36.6 KB

HTML

180.9 KB

Green Hosting Not Verified

Managed

3 recommendations

•Carbon footprint recommendation preview...

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Security Score

0%Critical

Interactive

No SSL

No WAF

nulld

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-store)

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=utf-8

date

Fri, 01 May 2026 19:10:08 GMT

server

nginx/1.24.0 (Ubuntu)

set-cookie

techaro.lol-anubis-auth

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

aspmx.l.google.com

Domain Information

t4s.cz

Domain Age

15y 8m

Created

17.08.2010

Expires

16.08.2026

Last Updated

19.08.2022

Registrar

REG-ZONER

DNSSEC

Not Enabled

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.

60/100

Mobile Friendly18 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,
                                 maximum-scale=1.0, user-scalable=no

3 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

sans

WCAG AA

75/100

Readability

/30

23/30

15px · LH 1.60

Hierarchy

/20

14/20

1.6x ratio · ✓ H1→H6

WCAG

/25

22/25

6.05:1 min contrast

Performance

/25

16/25

1 font

Heading Font

sans

Sans24px

Body Font

sans

Sans15px

Contrast Ratio

6.05:1

WCAG AA (≥4.5:1)

Reading Comfort

~41 CPL

Narrow lines

24px

15px

⚠️ Small text: 15px may strain on mobile. Use ≥16px for WCAG compliance.

✅ Optimal line spacing: 1.60 ratio (ideal range 1.4–1.6).

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 6.0:1).

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

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

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

Buy on MyFonts

Color Palette

6 unique colors

2.85:1 Fail Light

#ffffff

Primary· 98.30000000000001%

#99999a

Other· 0.2%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

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Website Identity

t4s.cz

15 years old

Location detected: 🇨🇿 Czech Republicvia tld

REG-ZONER📧 Google Workspaceen

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Last analyzed: 01 May 2026 at 19:10

Historical Analysis & Change Tracking