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fzu.cz

https://fzu.cz· First analyzed 10 May 2026· Updated 10 May 2026
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fzu.cz
Desktop screenshot of fzu.cz
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Mobile

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Hosting Provider

Czech Academy of Sciences

IP Address

147.231.27.145

Site Location

🇨🇿 Czech Republicvia tld

Server Location

🇨🇿 Prague, Czechia

ASN

AS2852

Organization

Czech Academy of Sciences

Server

Apache

Nameservers

s-dns.fzu.cz.expat.cesnet.cz.c-dns.fzu.cz.

Performance

99

Core Web Vitals

Weight

First Contentful Paint
696 ms10%
Speed Index
905 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
2.2 MB
56 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Drupal

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

6 Technologies Detected

Analytics

3
Facebook PixelMatomoMicrosoft Clarity

CSS Frameworks

1
Tailwind CSS

Web Servers

1
Apachev2.4.37

Languages

1
PHPv8.3.31

SEO Analysis

B73/100
22
5
1
Meta Tags10/15
Content11/12
Headings6/8
Technical19/25
E-E-A-T0/7
Images4/7
Links5/5
URL5/5
Social4/5
Freshness2/4
Mobile4/4
Indexability3/3
F
fzu.czfzu.cz

Fyzikální ústav Akademie věd České republiky | FZU

No description available for this page.

Title Length50 chars

Recommended: 50-60 chars (~299px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

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

6 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

7 URLs

7 sub-sitemaps

robots.txt

53 rules

Local SEO

Local Search Readiness

7/100
Poor
2 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

D46/100
Bot Access
18/25
Machine Read.
11/25
Schema Data
0/25
Citation
17/25

AI Bot Access

11/14 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:4%
Words:630
Token eff.:Optimal
Sections/1K:28.6
Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary11w
Descriptive Headingsavg 6.1w
Canonical URL
Open Graph2/3
Twitter Card2/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (9)
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.
C
68/100
11
Passed
4
Critical
2
Warnings
Images & Alt Text
15/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
15/20
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
9/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
4 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.
37/100
D
277 mg
CO₂e / view
2.2 MB
Page Weight
50%
Cleaner Than
New Visitor
316 mg
vs
Returning (cached)
158 mg
Annual (10K/mo)
33.2 kg
Emission Segments
Data Center
62 mg
Network
66 mg
Device
149 mg
Resource Breakdown
JavaScript
176.6 KB
Images
891.2 KB
CSS
1.1 MB
HTML
16.8 KB
Other
300 B
Green Hosting Not Verified
Czech Academy of Sciences
6 recommendations
  • •Carbon footprint recommendation preview...
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D

Security Score

41%Poor
Interactive

HTTPS

No WAF

120d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

08.09.2025

Valid Until

08.09.2026

OCSP Stapling

Enabled

Subject Alternative Names (10)

www.fzu.czlicence.fzu.czcrystbox.fzu.czwebfzu-prod.fzu.czintranet.fzu.czmautic.fzu.czmatomo.fzu.czwebfzu-para.fzu.cz+2 more

SHA-256 Fingerprint

6A:75:8B:93:96:7E:D0:D4:FF:1E:9D:54:F2:12:6E:C4:D8:4C:98:A8...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

cache-control
🔴 No Cache(must-revalidate, no-cache, private)
content-encoding
📦 Gzip(gzip)
content-language
cs
content-length
16864
content-type
text/html; charset=UTF-8
date
Sun, 10 May 2026 14:22:14 GMT
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

65

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

mx2.fzu.cz

Domain Information

fzu.cz

Domain Age
30y 4m

Created

12.01.1996

Expires

05.10.2033

Last Updated

30.01.2020

Registrar

REG-WEDOS

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

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.
C
68/100
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=1.0
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Open Sans

WCAG Partial
74/100
Readability
/30
25/30

16px · LH 1.50

Hierarchy
/20
17/20

2.12x ratio

WCAG
/25
14/25

1.6:1 min contrast

Performance
/25
18/25

1 font · 4 req

Heading Font

Open Sans

Sans34px

Body Font

Open Sans

Sans16px

Contrast Ratio

1.6:1

24 issues

Reading Comfort

~39 CPL

Narrow lines
34px
h1
30px
h2
22px
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 32/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 24 elements below WCAG AA threshold (min 1.6:1).

⚠️ Minor heading issue: 0 level skip(s) detected. Maintain sequential order for screen readers.

✅ Strong hierarchy: Headlines are 2.1x larger than body text.

Buy on MyFontsFlesch 32

Color Palette

12 unique colors
3.52:1 AA Large Light
#f6f6f6
Primary· 27.999999999999996%
#8d7e91
Secondary· 9.3%
#742a46
Secondary· 8.7%
#5e1d37
Accent· 7.8%
#032d70
Primary· 7.6%
#925067
Secondary· 7.2%
#313c71
Secondary· 6.5%
#211e58
Secondary· 5.3%

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

5
Scripts
3
Styles
1
Async
1
Defer

Top Script Sources

local(3)matomo.fzu.cz(1)cookiehub.net(1)

Website Identity

fzu.cz

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

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Last analyzed: 10 May 2026 at 14:22

Historical Analysis & Change Tracking