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us.edu.pl

https://us.edu.pl· First analyzed 25 Apr 2026· Updated 25 Apr 2026
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us.edu.pl
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Hosting Provider

University of Silesia

IP Address

155.158.211.71

Site Location

🇵🇱 Polandvia tld

Server Location

🇵🇱 Sosnowiec, Poland

ASN

AS8508

Organization

University of Silesia

Server

Nginx

Nameservers

dns1.us.edu.pl.dns2.us.edu.pl.cocos.fuw.edu.pl.

Performance

96

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%
3.4 MB
66 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
WordPressv5.9.13
cms
Uniwersytet Śląskiv0.0.1Custom
by Dmitry [knuckles] Rodionov, Vadym [jarroot] Ponamarenko

Technology Stack

21 Technologies Detected

Plugins

9
Mimetypes Link IconsNfinity Elastic SearchAdvanced Iframe
Contact Form 7
Levents PluginLayered PopupsComplianz Gdpr Premium MultisiteJs_Composer
WP Rocket

Analytics

4
Google Analytics
Google Analytics 4
Facebook Pixel
Hotjar

Libraries

2
jQuery
Moment.js

UI Components

1
Fancybox

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

Tag Managers

1
Google Tag Manager

Web Servers

1
Nginx

Security

1
reCAPTCHA

SEO Analysis

A86/100
25
3
0
Meta Tags14/15
Content11/12
Headings8/8
Technical21/21
E-E-A-T2/7
Images5/7
Links5/5
URL5/5
Social5/5
Freshness4/4
Mobile3/4
Indexability3/3
U
us.edu.plus.edu.pl

Uniwersytet Śląski w Katowicach – UŚ Katowice

Uniwersytet Śląski tworzą ludzie, którzy poprzez działalność badawczą, dydaktyczną i artystyczną odważnie kształtują przyszłość regionu, kraju i świata

Title Length45 chars

Recommended: 50-60 chars (~279px / 580px)

Description Length151 chars

Recommended: 120-160 chars

Issues (0)

    3 issues found

    Upgrade to view details

    Local SEO

    Local Search Readiness

    28/100
    Needs Work
    8 10

    Sponsored

    AI & LLM Readiness

    D53/100
    Bot Access
    20/25
    Machine Read.
    10/25
    Schema Data
    7/25
    Citation
    16/25

    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
    data-nosnippet

    Machine Readability

    llms.txt
    llms-full.txt
    Semantic HTML
    Heading Hierarchy
    Text ratio:9%
    Words:2,838
    Token eff.:Optimal

    Structured Data

    5 JSON-LD
    Organization×1.1WebSiteBreadcrumbListSearchAction

    Citation Readiness

    Opening Summary1991w
    Descriptive Headingsavg 8.6w
    Canonical URL
    Open Graph3/3
    Twitter Card3/3
    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.
    A
    87/100
    16
    Passed
    2
    Critical
    1
    Warnings
    Images & Alt Text
    18/20
    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
    12/15
    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
    11/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    11/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    2 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.
    21/100
    F
    428 mg
    CO₂e / view
    3.4 MB
    Page Weight
    15%
    Cleaner Than
    New Visitor
    489 mg
    vs
    Returning (cached)
    245 mg
    Annual (10K/mo)
    51.4 kg
    Emission Segments
    Data Center
    96 mg
    Network
    103 mg
    Device
    230 mg
    Resource Breakdown
    JavaScript
    476.9 KB
    Images
    2.6 MB
    CSS
    268.3 KB
    HTML
    37.0 KB
    Other
    1.4 KB
    Green Hosting Not Verified
    University of Silesia
    6 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    F

    Security Score

    21%Critical
    Interactive

    HTTPS

    No WAF

    201d

    Certificate Details

    Type

    Organization Validated (OV)

    Certificate Authority

    Hellenic Academic and Research Institutions CA

    Key Algorithm

    RSA (2048 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.2

    HTTP Protocol

    HTTP/2

    Valid From

    13.11.2025

    Valid Until

    13.11.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (2)

    *.us.edu.plus.edu.pl

    SHA-256 Fingerprint

    A4:D1:1E:E4:7B:60:8D:BF:15:06:8D:36:3F:48:89:3B:23:0B:CE:FF...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    content-encoding
    📦 Gzip(gzip)
    content-type
    text/html; charset=UTF-8
    date
    Sat, 25 Apr 2026 15:58:08 GMT
    last-modified
    Fri, 24 Apr 2026 15:33:25 GMT
    server
    nginx
    vary
    Accept-Encoding
    Good Warning Issue

    Email Infrastructure

    Barracuda

    Score

    98

    SPF
    DKIM
    DMARC

    DMARC Policy

    Quarantine (Moderate)

    MX Records (2)

    d69205b.ess.barracudanetworks.com
    d69205a.ess.barracudanetworks.com

    Domain Information

    us.edu.pl

    Domain Age
    30y 4m

    Created

    29.12.1995

    Expires

    31.12.2026

    Last Updated

    22.12.2025

    Registrar

    nazwa.pl sp. z o.o.

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Complianz

    Cookie Consent Banner
    Complianz
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    CMP: Complianz
    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.
    B
    76/100
    Mobile Friendly9 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, shrink-to-fit=no
    2 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    PT Sans Narrow + Open Sans

    WCAG Partial
    63/100
    Readability
    /30
    23/30

    14px · LH 1.50

    Hierarchy
    /20
    13/20

    2.78x ratio

    WCAG
    /25
    15/25

    1:1 min contrast

    Performance
    /25
    12/25

    3 fonts · 7 req

    Heading Font

    PT Sans Narrow

    Sans40px

    Body Font

    Open Sans

    Sans14px

    Contrast Ratio

    1:1

    14 issues

    Reading Comfort

    ~61 CPL

    Optimal (45–75)
    40px
    h1
    31px
    h2
    43px
    h3
    14px
    p
    Minor Second
    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).

    ✅ Optimal line length: ~61 chars/line (ideal 45–75 CPL).

    ❌ Very complex text: Flesch score 0/100. Consider shorter sentences and simpler words.

    ⚠️ Partial contrast: 14 elements below WCAG AA threshold (min 1.0:1).

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

    Buy on MyFontsFlesch 0

    Color Palette

    6 unique colors
    4.29:1 AA Large Light
    #ffffff
    Background· 29.4%
    #7b7981
    Other· 8.6%
    #011635
    Primary· 29.6%
    #002e5a
    Primary· 19.4%
    #361842
    Secondary· 2.1%

    Business & Marketing Stack

    3 Tools Detected

    Advanced

    Behavior Analytics

    2
    Google Tag ManagerFree
    Google AnalyticsFree

    User behavior and product analytics

    Privacy & Cookies

    1
    ComplianzSMB

    Cookie consent and privacy compliance tools

    2

    Categories

    3

    Total Tools

    0

    Enterprise

    0

    Mid-Market

    Assessment: Well-developed marketing technology stack

    Sponsored

    Scripts & Styles

    22 Resources

    19
    Scripts
    3
    Styles
    2
    Async
    1
    Defer

    Top Script Sources

    us.edu.pl(18)googletagmanager.com(1)

    Website Identity

    Uniwersytet Śląski w Katowicach

    Organization

    Strona główna

    info@us.edu.pl
    us.edu.pl/
    30 years old
    Location detected: 🇵🇱 Polandvia tld
    nazwa.pl sp. z o.o.📧 Barracudapl-PL

    Sponsored

    Last analyzed: 25 Apr 2026 at 15:59

    Historical Analysis & Change Tracking