avcr.cz

https://avcr.cz· First analyzed 30 Apr 2026· Updated 30 Apr 2026

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avcr.cz

Mobile

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Hosting Provider

Czech Academy of Sciences

IP Address

147.231.163.240

Site Location

🇨🇿 Czech Republicvia tld

Server Location

🇨🇿 Prague, Czechia

ASN

AS2852

Organization

Czech Academy of Sciences

Server

OpenCms/11.0.x

Nameservers

academy.cas.cz.nsa.ces.net.visla.utia.cas.cz.

Performance

Core Web Vitals

Weight

First Contentful Paint

928 ms10%

Speed Index

1.2 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

2 MB

81 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Czech Academy of Sciences

Technology Stack

10 Technologies Detected

Libraries

jQueryv1.11.0

jQuery UI

UI Components

Slick Carousel Owl Carousel

CSS Frameworks

Analytics

Other

Icon Libraries

SEO Analysis

D59/100

Meta Tags13/15

Content12/12

Headings3/8

Technical13/25

E-E-A-T0/7

Images1/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

avcr.czavcr.cz

Akademie věd České republiky - Akademie věd České republiky

Akademie věd České republiky, veřejná neuniverzitní výzkumná instituce.

Title Length59 chars

Recommended: 50-60 chars (~358px / 580px)

Description Length71 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (59/109) — critical for accessibility and SEO

10 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

23 rules

Sitemap reference found

Local SEO

Local Search Readiness

10/100

Poor

3 12 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

Sponsored

AI & LLM Readiness

F39/100

Bot Access

20/25

Machine Read.

7/25

Schema Data

0/25

Citation

12/25

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

Text ratio:9%

Words:1,959

Token eff.:Optimal

Sections/1K:18.4

Structured Data

No Schema

Citation Readiness

Opening Summary51w

Descriptive Headingsavg 8.9w

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

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.

56/100

Passed

Critical

Warnings

Images & Alt Text

18/20

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

Semantic Structure

7/20

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

4/15

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.

20/100

251 mg

CO₂e / view

2.0 MB

Page Weight

50%

Cleaner Than

New Visitor

287 mg

Returning (cached)

144 mg

Annual (10K/mo)

30.1 kg

Emission Segments

Data Center

56 mg

Network

60 mg

Device

135 mg

Resource Breakdown

JavaScript

328.9 KB

Images

1.4 MB

CSS

192.2 KB

HTML

86.1 KB

Green Hosting Not Verified

Czech Academy of Sciences

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

168d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

16.10.2025

Valid Until

16.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (4)

avcr.czwww.avcr.czwww.cas.czcas.cz

SHA-256 Fingerprint

2C:EB:51:E2:EE:FD:19:FA:45:D1:30:D4:55:84:B7:E4:67:E3:50:9C...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🟡 0s(public, max-age=0)

connection

Keep-Alive

content-length

87826

content-type

text/html;charset=UTF-8

date

Thu, 30 Apr 2026 20:08:50 GMT

keep-alive

timeout=5, max=100

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

avcr-cz.mail.protection.outlook.com

Domain Information

avcr.cz

Domain Age

22y 7m

Created

12.09.2003

Expires

11.09.2026

Last Updated

26.02.2025

Registrar

REG-GRANSY

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

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.

65/100

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

3 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Tahoma

WCAG Partial

62/100

Readability

/30

22/30

14px · LH 1.50

Hierarchy

/20

8/20

WCAG

/25

19/25

1.42:1 min contrast

Performance

/25

13/25

1 font · 1 req

Heading Font

Tahoma

Sans

Body Font

Tahoma

Sans14px

Contrast Ratio

1.42:1

2 issues

Reading Comfort

~37 CPL

Narrow lines

17px

32px

14px

Octave

Scale

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

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

⚠️ Partial contrast: 2 elements below WCAG AA threshold (min 1.4:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and 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 52

Color Palette

13 unique colors

16.82:1 AAA Light

#ffffff

Background· 20.4%

#211c1d

Secondary· 5%

#0273b5

Primary· 7.6%

#829e9e

Secondary· 6.5%

#afaa9e

Secondary· 3.8%

#30474f

Secondary· 2.2%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

22 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(9)ajax.googleapis.com(1)osw-analytics3.avcr.cz(1)googletagmanager.com(1)

Website Identity

avcr.cz

info@cas.cz

22 years old

Location detected: 🇨🇿 Czech Republicvia tld

REG-GRANSY📧 Microsoft 365cs

Social Profiles

Facebook Instagram LinkedIn YouTube Bluesky

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Last analyzed: 30 Apr 2026 at 20:09

Historical Analysis & Change Tracking