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center.cz

https://center.cz· First analyzed 24 May 2026· Updated 24 May 2026
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center.cz
Desktop screenshot of center.cz
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Mobile

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Hosting Provider

Internet Info, s.r.o.

IP Address

91.213.160.170

Site Location

🇨🇿 Czech Republicvia tld

Server Location

🇨🇿 Dolní Břežany, Czechia

ASN

AS24971

Organization

Internet Info, s.r.o.

Server

Nginx

Nameservers

ns.iinfo.cz.ns6.adminit.cz.

Performance

93

Core Web Vitals

Weight

First Contentful Paint
1.3 s10%
Speed Index
1.7 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
810 KB
163 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Internet Info, s.r.o.

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

12 Technologies Detected

Analytics

3
Google Analytics
Google Analytics 4
Segment

Advertising

2
Google AdsGoogle AdSense

Libraries

1
jQuery UI

Other

1
D3.js

CSS Frameworks

1
Tailwind CSS

Fonts

1
Google Fonts

Tag Managers

1
Google Tag Manager

Web Servers

1
Nginx

Customer Support

1
Zendesk

SEO Analysis

C60/100
20
3
2
Meta Tags5/15
Content3/12
Headings8/8
Technical19/25
E-E-A-T0/7
Images3/7
Links5/5
URL5/5
Social5/5
Freshness0/4
Mobile4/4
Indexability3/3
C
center.czcenter.cz

BusinessCenter.cz

BusinessCenter.cz - Informační server pro podnikání

Title Length17 chars

Recommended: 50-60 chars (~101px / 580px)

Description Length51 chars

Recommended: 120-160 chars

Issues (2)

  • • Very thin content (1 words). Search engines need substantial content for ranking.
  • • Most images missing alt text (62/69) — critical for accessibility and SEO

5 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

110 URLs

110 sub-sitemaps

robots.txt

13 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.

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:1,534
Token eff.:Optimal

Structured Data

No Schema

Citation Readiness

Opening Summary
Descriptive Headings
Canonical URL
Open Graph3/3
Twitter Card3/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (11)
AI readiness recommendation preview...
Upgrade to view recommendations

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.
A
80/100
13
Passed
3
Critical
1
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
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
6/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
2 recommendations
  • •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.
47/100
B
100 mg
CO₂e / view
809.8 KB
Page Weight
80%
Cleaner Than
New Visitor
115 mg
vs
Returning (cached)
57 mg
Annual (10K/mo)
12.0 kg
Emission Segments
Data Center
22 mg
Network
24 mg
Device
54 mg
Resource Breakdown
JavaScript
696.6 KB
Images
343 B
Fonts
3.5 KB
HTML
108.7 KB
Other
602 B
Green Hosting Not Verified
Internet Info, s.r.o.
6 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
B

Security Score

71%Good
Interactive

HTTPS

No WAF

53d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp384r1) (384 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

18.04.2026

Valid Until

17.07.2026

Subject Alternative Names (12)

beta.businesscenter.podnikatel.czbeta.podnikatel.czbusinesscenter.podnikatel.czdane.podnikatel.czdiners-beta.podnikatel.czdiners.podnikatel.czeet.podnikatel.czpodnikatel.cz+4 more

SHA-256 Fingerprint

D0:32:7D:CF:3E:49:55:85:28:13:74:08:40:8D:02:3B:0E:FA:13:98...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-header
*
content-encoding
📦 Gzip(gzip)
content-security-policy
upgrade-insecure-requests
content-type
text/html; charset=utf-8
date
Sun, 24 May 2026 23:02:58 GMT
referrer-policy
no-referrer-when-downgrade
Good Warning Issue

Email Infrastructure

Google Workspace

Score

45

SPF
DKIM
DMARC

MX Records (5)

ALT1.ASPMX.L.GOOGLE.COM
ALT3.ASPMX.L.GOOGLE.COM
ALT4.ASPMX.L.GOOGLE.COM
ALT2.ASPMX.L.GOOGLE.COM

+1 more

Domain Information

center.cz

Domain Age
27y 11m

Created

08.06.1998

Expires

12.10.2026

Last Updated

04.01.2022

Registrar

REG-INTERNET-CZ

DNSSEC
Not Enabled

Privacy & Compliance

Quantcast Choice

Cookie Consent Banner
Quantcast Choice
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
CMP: Quantcast Choice
Privacy policy page linked
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
84/100
Mobile Friendly188 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, minimum-scale=1
1 recommendation
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Arial + Helvetica

WCAG AA
60/100
Readability
/30
10/30

13px · LH 1.20

Hierarchy
/20
14/20

2.4x ratio

WCAG
/25
20/25

4.95:1 min contrast

Performance
/25
16/25

System fonts

Heading Font

Arial

Sans32px

Body Font

Helvetica

Sans13px

Contrast Ratio

4.95:1

WCAG AA (≥4.5:1)

Reading Comfort

~40 CPL

Narrow lines
32px
h1
28px
h2
25px
h3
16px
h4
13px
p

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

⚠️ Tight line spacing (1.20). Increase to 1.4–1.6 for better readability.

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 5.0:1).

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

✅ Strong hierarchy: Headlines are 2.4x larger than body text.

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

GGoogle FontsFluid TypeFlesch 54

Color Palette

8 unique colors
2.78:1 Fail Light
#ffffff
Primary· 45.59999999999999%
#969c9f
Other· 5%
#2e668a
Secondary· 6.4%
#d8e2e7
Secondary· 4.9%
#8fb9c1
Secondary· 0.6%

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

2
Google Tag ManagerFree
Google AnalyticsFree

User behavior and product analytics

Advertising

1
Google AdsEnterprise

Ad platforms and retargeting pixels

2

Categories

3

Total Tools

1

Enterprise

0

Mid-Market

Assessment: Well-developed marketing technology stack

Ad Networks

Google AdSenseGoogle Ad ManagerPubMaticPrebid.js

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Scripts & Styles

25 Resources

20
Scripts
5
Styles
12
Async
2
Defer

Top Script Sources

f.businesscenter.podnikatel.cz(4)google-analytics.com(3)googletagmanager.com(2)pagead2.googlesyndication.com(2)st.getsitecontrol.com(1)

Website Identity

center.cz

27 years old
Location detected: 🇨🇿 Czech Republicvia tld
REG-INTERNET-CZ📧 Google Workspacecs

Sponsored

Last analyzed: 24 May 2026 at 23:03

Historical Analysis & Change Tracking