zsvendryne.cz

https://zsvendryne.cz· First analyzed 24 May 2026· Updated 24 May 2026

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zsvendryne.cz

Mobile

Sponsored

Hosting Provider

WEDOS Global

IP Address

185.8.237.5

Site Location

🇨🇿 Czech Republicvia tld

Server Location

🇨🇿 Hluboká nad Vltavou, Czechia

ASN

AS208414

Server

Apache

Nameservers

ns.wedos.eu.ns.wedos.com.ns.wedos.net.ns.wedos.cz.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

655 ms10%

Speed Index

852 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

4.5 MB

58 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

Infrastructure

Hosting

WEDOS Global

Technology Stack

9 Technologies Detected

Analytics

UI Components

CSS Frameworks

Libraries

Web Servers

SEO Analysis

D58/100

Meta Tags5/15

Content10/12

Headings8/8

Technical15/25

E-E-A-T3/7

Images1/7

Links4/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

zsvendryne.czzsvendryne.cz

ZŠ Vendryně- Škola

Title Length18 chars

Recommended: 50-60 chars (~109px / 580px)

Description Length18 chars

Recommended: 120-160 chars

Issues (1)

• Most images missing alt text (11/13) — critical for accessibility and SEO

11 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

42 URLs

robots.txt

26 rules

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

F38/100

Bot Access

20/25

Machine Read.

11/25

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

navheader/footer

Text ratio:5%

Words:683

Token eff.:Optimal

Sections/1K:27.8

Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary

Descriptive Headingsavg 4.9w

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (10)

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.

65/100

Passed

Critical

Warnings

Images & Alt Text

10/20

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

5/15

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

7/15

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

ARIA & Roles

8/15

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.

14/100

575 mg

CO₂e / view

4.5 MB

Page Weight

15%

Cleaner Than

New Visitor

658 mg

Returning (cached)

329 mg

Annual (10K/mo)

69.0 kg

Emission Segments

Data Center

129 mg

Network

138 mg

Device

309 mg

Resource Breakdown

JavaScript

130.5 KB

Images

2.2 MB

CSS

2.2 MB

HTML

10.0 KB

Green Hosting Not Verified

WEDOS Global

7 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

82d

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/2+H3

Valid From

16.05.2026

Valid Until

14.08.2026

Subject Alternative Names (2)

*.zsvendryne.czzsvendryne.cz

SHA-256 Fingerprint

EF:24:97:C5:88:3A:F3:63:44:87:9E:FF:2B:9E:9B:60:93:5F:34:C2...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

age

alt-svc

h3=":443"; ma=86400

cache-control

🔴 No Cache(no-cache)

content-encoding

📦 Gzip(gzip)

content-length

9983

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

MX Records (5)

alt2.aspmx.l.google.com

alt1.aspmx.l.google.com

aspmx2.googlemail.com

aspmx.l.google.com

+1 more

Domain Information

zsvendryne.cz

Domain Age

20y 5m

Created

21.12.2005

Expires

20.12.2026

Last Updated

25.10.2016

Registrar

REG-WEDOS

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

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.

57/100

Mobile Friendly2 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

4 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Merriweather Sans

WCAG Partial

67/100

Readability

/30

21/30

14px · LH 1.80

Hierarchy

/20

15/20

1.53x ratio · ✓ H1→H6

WCAG

/25

16/25

1.32:1 min contrast

Performance

/25

15/25

1 font · 2 req

Heading Font

Merriweather Sans

Sans22px

Body Font

Merriweather Sans

Sans14px

Contrast Ratio

1.32:1

25 issues

Reading Comfort

Single Font Family

left aligned

22px

43px

28px

14px

Perfect Fourth

Scale

⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

⚠️ Partial contrast: 25 elements below WCAG AA threshold (min 1.3:1).

✅ 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 MyFontsFlesch 51

Color Palette

12 unique colors

20.5:1 AAA Light

#ffffff

Primary· 27.8%

#040404

Text· 6.5%

#191812

Secondary· 13.3%

#847656

Secondary· 8.7%

#b4c2d0

Secondary· 7.5%

#543f3e

Secondary· 6.3%

#1d63bb

Primary· 5.8%

#a19f84

Secondary· 5.8%

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

Social Media

Facebook SDKFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

23 Resources

Scripts

Styles

Async

Defer

Top Script Sources

zsvendryne.cz(17)connect.facebook.net(2)googletagmanager.com(1)

Website Identity

zsvendryne.cz

20 years old

Location detected: 🇨🇿 Czech Republicvia tld

REG-WEDOS📧 Google Workspacecs

Social Profiles

Facebook

Sponsored

Last analyzed: 24 May 2026 at 13:17

Historical Analysis & Change Tracking