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tzb-info.cz

https://tzb-info.cz· First analyzed 05 May 2026· Updated 05 May 2026
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tzb-info.cz
Desktop screenshot of tzb-info.cz
Mobile screenshot of tzb-info.cz
Mobile

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Hosting Provider

ACTIVE24

IP Address

81.95.98.218

Site Location

🇨🇿 Czech Republicvia tld

Server Location

🇨🇿 Prague, Czechia

ASN

AS25234

Organization

ACTIVE24

Server

Apache

Nameservers

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

Performance

90

Core Web Vitals

Weight

First Contentful Paint
1.5 s10%
Speed Index
1.9 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.5 MB
124 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
ACTIVE24

Technology Stack

11 Technologies Detected

Analytics

3
Google Analytics
Google Analytics 4
Hotjar

Advertising

2
Google AdsCriteo

Libraries

1
jQueryv1.12.4

UI Components

1
Fancybox

CSS Frameworks

1
Tailwind CSS

Fonts

1
Google Fonts

Tag Managers

1
Google Tag Manager

Web Servers

1
Apachev2.4.29

SEO Analysis

C60/100
15
9
3
Meta Tags10/15
Content10/12
Headings3/8
Technical13/25
E-E-A-T3/7
Images1/7
Links5/5
URL5/5
Social3/5
Freshness0/4
Mobile4/4
Indexability3/3
T
tzb-info.cztzb-info.cz

TZB-info - Stavebnictví. Úspory energií. Technická zařízení budov.

Odborný web pro stavebnictví, technická zařízení budov a úspory energií. To nejlepší o stavbě a vytápění, větrání, klimatizaci, vodě a kanalizaci, obnoviteln...

Description truncated.
Title Length66 chars

Recommended: 50-60 chars (~393px / 580px)

Description Length293 chars

Recommended: 120-160 chars

Issues (3)

  • • Missing H1 tag — every page should have exactly one H1
  • • Most images missing alt text (53/80) — critical for accessibility and SEO
  • • Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

12 issues found

Upgrade to view details

Crawlability

Sitemap
robots.txt

5 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

D45/100
Bot Access
20/25
Machine Read.
8/25
Schema Data
0/25
Citation
17/25

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
nav
Text ratio:10%
Words:4,333
Token eff.:Good
Sections/1K:19.4
Depth:1/5

Structured Data

Microdata

Citation Readiness

Opening Summary32w
Descriptive Headingsavg 7.2w
Canonical URL
Open Graph3/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (9)
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.
C
68/100
11
Passed
4
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
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
9/15
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...
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.
33/100
C
185 mg
CO₂e / view
1.5 MB
Page Weight
60%
Cleaner Than
New Visitor
211 mg
vs
Returning (cached)
106 mg
Annual (10K/mo)
22.2 kg
Emission Segments
Data Center
41 mg
Network
44 mg
Device
99 mg
Resource Breakdown
JavaScript
286.7 KB
Images
1.1 MB
CSS
39.4 KB
Fonts
3.8 KB
HTML
21.8 KB
Other
654 B
Green Hosting Not Verified
ACTIVE24
6 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

21%Critical
Interactive

HTTPS

No WAF

135d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

10.12.2025

Valid Until

17.09.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.tzb-info.cztzb-info.cz

SHA-256 Fingerprint

6F:3E:FA:39:F8:20:5E:BA:4E:D9:D6:93:84:4B:BF:44:BB:2F:23:68...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

connection
Keep-Alive
content-encoding
📦 Gzip(gzip)
content-length
22056
content-type
text/html; charset=utf-8
date
Tue, 05 May 2026 22:23:57 GMT
keep-alive
timeout=2, max=100
Good Warning Issue

Email Infrastructure

Microsoft 365

Score

45

SPF
DKIM
DMARC

MX Records (2)

tzbinfo-cz0i.mail.eo.outlook.com
alfa.topinfo.cz

Domain Information

tzb-info.cz

Domain Age
24y 12m

Created

16.05.2001

Expires

15.05.2027

Last Updated

21.03.2026

Registrar

REG-ACTIVE24

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.
D
47/100
Not Mobile Friendly7 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.
4 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Roboto Condensed + Roboto

WCAG Partial
52/100
Readability
/30
20/30

13px · LH 1.46

Hierarchy
/20
8/20
WCAG
/25
14/25

1.88:1 min contrast

Performance
/25
10/25

4 fonts · 5 req

Heading Font

Roboto Condensed

Sans

Body Font

Roboto

Sans13px

Contrast Ratio

1.88:1

19 issues

Reading Comfort

~58 CPL

Optimal (45–75)
22px
h2
18px
h3
20px
h4
13px
p

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

✅ Optimal line spacing: 1.46 ratio (ideal range 1.4–1.6).

✅ Optimal line length: ~58 chars/line (ideal 45–75 CPL).

❌ Very complex text: Flesch score 21/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 19 elements below WCAG AA threshold (min 1.9:1).

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

GGoogle FontsBuy on MyFontsFlesch 21

Color Palette

5 unique colors
3.7:1 AA Large Dark
#757575
Other· 34.300000000000004%
#1c1c1c
Text· 20.8%
#41352b
Primary· 6.8%

Business & Marketing Stack

3 Tools Detected

Growing

Behavior Analytics

3
Google Tag ManagerFree
Google AnalyticsFree
HotjarMid-Market

User behavior and product analytics

1

Categories

3

Total Tools

0

Enterprise

1

Mid-Market

Assessment: Growing marketing technology adoption

Ad Networks

Google Ad ManagerIndex Exchange

Sponsored

Scripts & Styles

28 Resources

20
Scripts
8
Styles
7
Async
1
Defer

Top Script Sources

local(11)googletagmanager.com(2)securepubads.g.doubleclick.net(2)cdn.cookie-script.com(2)spir.hit.gemius.pl(1)

Website Identity

tzb-info.cz

24 years old
Location detected: 🇨🇿 Czech Republicvia tld
REG-ACTIVE24📧 Microsoft 365cs

Social Profiles

Facebook

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Last analyzed: 05 May 2026 at 22:24

Historical Analysis & Change Tracking