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czso.cz

https://czso.cz· First analyzed 28 Apr 2026· Updated 28 Apr 2026
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czso.cz
Desktop screenshot of czso.cz
Mobile screenshot of czso.cz
Mobile

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Hosting Provider

Cesky Statisticky Urad

IP Address

194.48.241.132

Site Location

🇨🇿 Czech Republicvia tld

Server Location

🇨🇿 Staré Strašnice, Czechia

ASN

AS6855

Organization

Cesky Statisticky Urad

Server

Nginx

Nameservers

ns2.websupport.cz.ns3.websupport.eu.ns1.websupport.cz.

Performance

99

Core Web Vitals

Weight

First Contentful Paint
752 ms10%
Speed Index
978 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
864 KB
106 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Cesky Statisticky Urad

Technology Stack

3 Technologies Detected

CSS Frameworks

1
Tailwind CSS

Analytics

1
Matomo

Web Servers

1
Nginx

SEO Analysis

C60/100
17
7
1
Meta Tags7/15
Content6/12
Headings8/8
Technical15/25
E-E-A-T0/7
Images2/7
Links5/5
URL5/5
Social5/5
Freshness0/4
Mobile4/4
Indexability3/3
C
czso.czczso.cz

Český statistický úřad | Statistika

No description available for this page.

Title Length35 chars

Recommended: 50-60 chars (~206px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

  • • Missing meta description — important for click-through rates in SERPs

8 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

4 URLs

4 sub-sitemaps

robots.txt

23 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

F33/100
Bot Access
20/25
Machine Read.
7/25
Schema Data
0/25
Citation
6/25

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:725
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...
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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.
A
82/100
14
Passed
2
Critical
1
Warnings
Images & Alt Text
15/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
20/20
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.
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.
48/100
B
107 mg
CO₂e / view
864.4 KB
Page Weight
80%
Cleaner Than
New Visitor
122 mg
vs
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
161.0 KB
Images
567.8 KB
CSS
107.1 KB
HTML
16.9 KB
Other
11.7 KB
Green Hosting Not Verified
Cesky Statisticky Urad
4 recommendations
  • •Carbon footprint recommendation preview...
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A

Security Score

86%Very Good
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

27.04.2026

Valid Until

26.07.2026

Subject Alternative Names (2)

csu.gov.czwww.csu.gov.cz

SHA-256 Fingerprint

2F:11:05:E2:30:5C:3C:BC:86:31:E1:2A:F2:42:0D:FF:55:EC:8F:08...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges
bytes
age
25
cache-control
🔴 No Cache(no-cache, no-store, must-revalidate)
connection
keep-alive
content-encoding
📦 Gzip(gzip)
content-language
cs-cz
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

100

SPF
DKIM
DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

smtp3.czso.cz
mspool.gts.cz

Domain Information

czso.cz

Domain Age
30y 1m

Created

31.03.1996

Expires

09.10.2026

Last Updated

25.07.2025

Registrar

REG-ACTIVE24

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.
B
70/100
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
1 recommendation
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Roboto

WCAG Partial
75/100
Readability
/30
21/30

16px · LH 1.50

Hierarchy
/20
18/20

2.5x ratio · ✓ H1→H6

WCAG
/25
17/25

2.85:1 min contrast

Performance
/25
19/25

System fonts

Heading Font

Roboto

Sans40px

Body Font

Roboto

Sans16px

Contrast Ratio

2.85:1

8 issues

Reading Comfort

Single Font Family

left aligned
40px
h1
32px
h2
24px
h3
16px
p

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

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

⚠️ Hard to read: Flesch score 35/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 8 elements below WCAG AA threshold (min 2.9:1).

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

✅ Strong hierarchy: Headlines are 2.5x larger than body text.

Flesch 35

Color Palette

7 unique colors
Light
#ffffff
Primary· 39.8%
#005f9f
Accent· 29.200000000000003%
#144072
Accent· 9.3%
#e4f4fc
Primary· 5.6%
#b8d2e0
Secondary· 4.9%
#568eb5
Secondary· 3.2%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

2
Matomo (Piwik)Mid-Market
Google AnalyticsFree

User behavior and product analytics

1

Categories

2

Total Tools

0

Enterprise

1

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

8 Resources

4
Scripts
4
Styles
1
Async
1
Defer

Top Script Sources

local(3)mone.csu.gov.cz(1)

Website Identity

czso.cz

30 years old
Location detected: 🇨🇿 Czech Republicvia tld
REG-ACTIVE24cs-cz

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Last analyzed: 28 Apr 2026 at 03:08

Historical Analysis & Change Tracking