hvezdarna.cz

https://hvezdarna.cz· First analyzed 27 May 2026· Updated 27 May 2026

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hvezdarna.cz

Mobile

Sponsored

Hosting Provider

WEDOS Internet

IP Address

89.221.213.101

Site Location

🇨🇿 Czech Republicvia tld

Server Location

🇨🇿 Hluboká nad Vltavou, Czechia

ASN

AS197019

Organization

WEDOS Internet

Server

Apache Traffic Server

Nameservers

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

Performance

100

Core Web Vitals

Weight

First Contentful Paint

620 ms10%

Speed Index

806 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

1.9 MB

77 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPressv6.7.5

cms

HvezdarnaCustom

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

9 Technologies Detected

Analytics

Plugins

CSS Frameworks

Icon Libraries

Fonts

SEO Analysis

C64/100

Meta Tags5/15

Content10/12

Headings8/8

Technical20/25

E-E-A-T0/7

Images1/7

Links5/5

URL5/5

Social3/5

Freshness0/4

Mobile4/4

Indexability3/3

hvezdarna.czhvezdarna.cz

Hvězdárna a planetárium Brno

Title Length28 chars

Recommended: 50-60 chars (~172px / 580px)

Description Length28 chars

Recommended: 120-160 chars

Issues (1)

• Most images missing alt text (35/58) — critical for accessibility and SEO

8 issues found

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Crawlability

Sitemap

Type: index

5 URLs

5 sub-sitemaps

robots.txt

4 rules

Sitemap reference found

Local SEO

Local Search Readiness

15/100

Poor

5 11 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

F38/100

Bot Access

20/25

Machine Read.

8/25

Schema Data

0/25

Citation

10/25

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

data-nosnippet

Machine Readability

llms.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

Text ratio:6%

Words:530

Token eff.:Optimal

Sections/1K:3.8

Structured Data

No Schema

Citation Readiness

Opening Summary285w

Descriptive Headingsavg 1.5w

Canonical URL

Open Graph2/3

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.

69/100

Passed

Critical

Warnings

Images & Alt Text

13/20

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

Semantic Structure

11/20

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

9/15

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

ARIA & Roles

11/15

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.

30/100

239 mg

CO₂e / view

1.9 MB

Page Weight

50%

Cleaner Than

New Visitor

274 mg

Returning (cached)

137 mg

Annual (10K/mo)

28.7 kg

Emission Segments

Data Center

54 mg

Network

58 mg

Device

129 mg

Resource Breakdown

JavaScript

243.8 KB

Images

558.5 KB

CSS

1.1 MB

Fonts

2.2 KB

HTML

12.1 KB

Green Hosting Not Verified

WEDOS Internet

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

87d

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

Valid From

25.05.2026

Valid Until

23.08.2026

Subject Alternative Names (20)

astrokurz.hvezdarna.czdonator.hvezdarna.czdonatori.hvezdarna.czfacebook.hvezdarna.czfb.hvezdarna.czhistorie.hvezdarna.czhvezdarna.czinsta.hvezdarna.cz+12 more

SHA-256 Fingerprint

D5:B8:9D:C2:74:EC:2C:A9:DC:47:94:E1:12:63:69:B8:6E:FE:1C:26...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

age

cache-control

🟡 300s(max-age=300)

content-encoding

📦 Gzip(gzip)

content-length

12135

content-type

text/html; charset=UTF-8

date

Wed, 27 May 2026 23:40:36 GMT

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

hvezdarna-cz.mail.protection.outlook.com

Domain Information

hvezdarna.cz

Domain Age

27y 3m

Created

26.02.1999

Expires

06.10.2026

Last Updated

15.10.2025

Registrar

REG-ACTIVE24

DNSSEC

Not Enabled

Privacy & Compliance

Complianz

Cookie Consent Banner

Complianz

GDPR Indicators

Cookie consent banner detected

CMP: Complianz

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.

69/100

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,shrink-to-fit=no,viewport-fit=cover

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Oswald + Open Sans

WCAG Partial

65/100

Readability

/30

22/30

19px · LH 1.40

Hierarchy

/20

11/20

2.23x ratio

WCAG

/25

12/25

1:1 min contrast

Performance

/25

20/25

2 fonts · 1 req

Heading Font

Oswald

Display42px

Body Font

Open Sans

Sans19px

Contrast Ratio

1:1

7 issues

Reading Comfort

~39 CPL

Narrow lines

42px

63px

28px

26px

19px

✅ Excellent readability: 19px body text is ideal for all devices.

⚠️ Tight line spacing (1.40). Increase to 1.4–1.6 for better readability.

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

⚠️ Partial contrast: 7 elements below WCAG AA threshold (min 1.0:1).

⚠️ Minor heading issue: 1 level skip(s) detected. Maintain sequential order for screen readers.

✅ Strong hierarchy: Headlines are 2.2x larger than body text.

GGoogle Fonts Buy on MyFontsFlesch 48

Color Palette

9 unique colors

Light

#ffffff

Background· 26.799999999999997%

#0c2f44

Primary· 16.6%

#202036

Primary· 14.8%

#051a2c

Accent· 12.7%

#030a12

Accent· 10%

#818397

Secondary· 6.3%

#b9c9cf

Secondary· 5.6%

#573e66

Secondary· 4.6%

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

Ad platforms and retargeting pixels

Privacy & Cookies

ComplianzSMB

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

11 Resources

Scripts

Styles

Async

Defer

Top Script Sources

connect.facebook.net(2)hvezdarna.cz(2)googletagmanager.com(1)

Website Identity

hvezdarna.cz

[email protected]

27 years old

Location detected: 🇨🇿 Czech Republicvia tld

REG-ACTIVE24📧 Microsoft 365cs

Social Profiles

Facebook Instagram YouTube

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Last analyzed: 27 May 2026 at 23:41

Historical Analysis & Change Tracking