institutvk.cz

https://institutvk.cz· First analyzed 03 Jun 2026· Updated 03 Jun 2026

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institutvk.cz

Mobile

Sponsored

Hosting Provider

Web4U s.r.o

IP Address

81.91.86.12

Site Location

🇨🇿 Czech Republicvia phone

Server Location

🇨🇿 Prague, Czechia

ASN

AS39790

Organization

Web4U s.r.o

Server

OpenResty

Nameservers

ns2.web4u.cz.ns.web4u.cz.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.1 s10%

Speed Index

1.4 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

1.8 MB

65 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Web4U s.r.o

Technology Stack

10 Technologies Detected

Analytics

Google Analytics

Facebook Pixel Segment

Libraries

UI Components

CSS Frameworks

Tag Managers

Web Servers

Languages

SEO Analysis

D46/100

Meta Tags5/15

Content9/12

Headings0/8

Technical12/21

E-E-A-T0/7

Images1/7

Links5/5

URL5/5

Social2/5

Freshness0/4

Mobile4/4

Indexability3/3

institutvk.czinstitutvk.cz

Institut Václava Klause

Title Length23 chars

Recommended: 50-60 chars (~133px / 580px)

Description Length23 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (8/9) — critical for accessibility and SEO

10 issues found

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Local SEO

Local Search Readiness

16/100

Poor

5 10 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

F35/100

Bot Access

20/25

Machine Read.

10/25

Schema Data

0/25

Citation

5/25

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:7%

Words:356

Token eff.:Optimal

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary

Descriptive Headings

Canonical URL

Open Graph2/3

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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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.

57/100

Passed

Critical

Warnings

Images & Alt Text

10/20

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

Semantic Structure

12/20

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

1/15

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.

24/100

229 mg

CO₂e / view

1.8 MB

Page Weight

50%

Cleaner Than

New Visitor

261 mg

Returning (cached)

131 mg

Annual (10K/mo)

27.4 kg

Emission Segments

Data Center

51 mg

Network

55 mg

Device

123 mg

Resource Breakdown

JavaScript

568.6 KB

Images

379.7 KB

CSS

893.2 KB

HTML

6.1 KB

Other

1.7 KB

Green Hosting Not Verified

Web4U s.r.o

6 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

40d

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

Valid From

14.04.2026

Valid Until

13.07.2026

Subject Alternative Names (2)

institutvk.czwww.institutvk.cz

SHA-256 Fingerprint

3D:DF:9A:C5:2F:B1:58:04:ED:F8:A0:EF:29:B2:93:29:01:C7:37:3A...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-store, no-cache, must-revalidate, post-check=0, pre-check...)

content-encoding

📦 Gzip(gzip)

content-type

text/html

date

Wed, 03 Jun 2026 03:58:58 GMT

expires

Thu, 19 Nov 1981 08:52:00 GMT

pragma

no-cache

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (2)

mx2.mailchannels.net

mx1.mailchannels.net

Domain Information

institutvk.cz

Domain Age

14y 3m

Created

01.03.2012

Expires

28.02.2027

Last Updated

25.11.2013

Registrar

REG-WEB4U

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

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.

50/100

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, maximum-scale=1

4 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Font

WCAG Partial

59/100

Readability

/30

20/30

18px · LH --

Hierarchy

/20

8/20

WCAG

/25

18/25

1:1 min contrast

Performance

/25

13/25

1 font · 3 req

Heading Font

Font

Body Font

Font

Sans18px

Contrast Ratio

1:1

1 issue

Reading Comfort

Single Family

left aligned

✅ Excellent readability: 18px body text is ideal for all devices.

⚠️ Hard to read: Flesch score 37/100. Simplify sentences for wider reach.

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

✅ 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 37

Color Palette

10 unique colors

12.44:1 AAA Light

#f9f9f9

Background· 27.099999999999998%

#303037

Other· 10.7%

#160e0f

Primary· 12.1%

#423946

Secondary· 10.1%

#515c6b

Secondary· 8.5%

#623a45

Secondary· 3.1%

#e4dedd

Secondary· 2.7%

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

Ad platforms and retargeting pixels

Sponsored

Scripts & Styles

28 Resources

Scripts

Styles

Async

Defer

Top Script Sources

js(11)maps.googleapis.com(3)connect.facebook.net(2)googletagmanager.com(2)images(2)

Website Identity

institutvk.cz

[email protected]

+420283290009

14 years old

Location detected: 🇨🇿 Czech Republicvia phone

REG-WEB4Ucs

Social Profiles

Facebook X (Twitter)YouTube

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Last analyzed: 03 Jun 2026 at 03:59

Historical Analysis & Change Tracking