StackOptic
Back to Search
os-smisek.cz favicon

os-smisek.cz

https://os-smisek.cz· First analyzed 12 May 2026· Updated 12 May 2026
Export
os-smisek.cz
Desktop screenshot of os-smisek.cz
Mobile screenshot of os-smisek.cz
Mobile

Sponsored

Hosting Provider

Cloudflare
cloudflare.com

IP Address

172.67.178.83

Site Location

🇨🇿 Czech Republicvia tld

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

sri.ns.cloudflare.com.tricia.ns.cloudflare.com.

Performance

98

Core Web Vitals

Weight

First Contentful Paint
938 ms10%
Speed Index
1.2 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.1 MB
20 requests

Image Optimization

Lazy LoadWebP
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Cloudflare
CDN
Cloudflare

Technology Stack

3 Technologies Detected

CSS Frameworks

1
Tailwind CSS

Fonts

1
Google Fonts

CDN

1
Cloudflare

SEO Analysis

A+90/100
29
2
0
Meta Tags12/15
Content12/12
Headings8/8
Technical24/25
E-E-A-T5/7
Images6/7
Links4/5
URL5/5
Social5/5
Freshness2/4
Mobile4/4
Indexability3/3
O
os-smisek.czos-smisek.cz

Nejlepší Mezinárodní Online Casino 2026

Vstupte do světa mezinárodních online casin. Hrajte o jackpoty v eurech a užijte si špičkové hry od světových providerů. Registrace z ČR povolena.

Title Length39 chars

Recommended: 50-60 chars (~236px / 580px)

Description Length146 chars

Recommended: 120-160 chars

Issues (0)

    2 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: standard

    2 URLs

    robots.txt

    83 rules

    Sitemap reference found

    Local SEO

    Local Search Readiness

    19/100
    Poor
    5 14

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

    Sponsored

    AI & LLM Readiness

    D59/100
    Bot Access
    20/25
    Machine Read.
    12/25
    Schema Data
    8/25
    Citation
    19/25

    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
    navheader/footer
    Text ratio:46%
    Words:5,363
    Token eff.:Acceptable
    Sections/1K:10.6
    Depth:2/5

    Structured Data

    3 JSON-LD
    FAQPage×1.5microdataOrganization×1.1WebSite

    Citation Readiness

    Opening Summary70w
    Descriptive Headingsavg 6.2w
    Canonical URL
    Open Graph3/3
    Twitter Card3/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (6)
    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
    88/100
    14
    Passed
    1
    Critical
    0
    Warnings
    Images & Alt Text
    20/20
    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
    15/15
    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.
    1 recommendation
    • •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.
    64/100
    B
    110 mg
    CO₂e / view
    1.1 MB
    Page Weight
    70%
    Cleaner Than
    New Visitor
    126 mg
    vs
    Returning (cached)
    63 mg
    Annual (10K/mo)
    13.2 kg
    Emission Segments
    Data Center
    5 mg
    Network
    32 mg
    Device
    73 mg
    Resource Breakdown
    JavaScript
    3.2 KB
    Images
    916.7 KB
    CSS
    149.7 KB
    Fonts
    1.1 KB
    HTML
    21.1 KB
    Green Hosting Verified
    Cloudflare
    GWF Verified
    5 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    A+

    Security Score

    91%Excellent
    Static / Informational

    HTTPS

    WAF

    57d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Google Trust Services

    Key Algorithm

    ECDSA (secp256r1) (256 bit)

    Signature

    ECDSA with SHA-256

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2+H3

    Valid From

    09.04.2026

    Valid Until

    08.07.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (2)

    os-smisek.cz*.os-smisek.cz

    SHA-256 Fingerprint

    8B:42:0A:60:81:52:F9:38:4E:78:59:F6:42:36:45:EB:4F:6D:09:6E...

    Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    alt-svc
    h3=":443"; ma=86400
    cf-cache-status
    DYNAMIC
    cf-ray
    9fa67b805caa7818-BOS
    content-encoding
    zstd
    content-type
    text/html; charset=utf-8
    date
    Tue, 12 May 2026 03:54:30 GMT
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    0

    SPF
    DKIM
    DMARC

    Domain Information

    os-smisek.cz

    Domain Age
    2y 10m

    Created

    07.07.2023

    Expires

    06.07.2026

    Last Updated

    09.02.2026

    Registrar

    REG-KEYSYSTEMS

    DNSSEC
    Not Enabled

    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
    58/100
    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

    Sora + -apple-system

    WCAG Partial
    74/100
    Readability
    /30
    23/30

    17px · LH 1.60

    Hierarchy
    /20
    19/20

    3x ratio · ✓ H1→H6

    WCAG
    /25
    16/25

    1:1 min contrast

    Performance
    /25
    16/25

    System fonts

    Heading Font

    Sora

    Sans50px

    Body Font

    -apple-system

    Sans17px

    Contrast Ratio

    1:1

    6 issues

    Reading Comfort

    ~33 CPL

    Narrow lines
    50px
    h1
    31px
    h2
    31px
    h3
    31px
    h4
    17px
    p

    ✅ Excellent readability: 17px body text is ideal for all devices.

    ✅ Optimal line spacing: 1.60 ratio (ideal range 1.4–1.6).

    ⚠️ Hard to read: Flesch score 38/100. Simplify sentences for wider reach.

    ⚠️ Partial contrast: 6 elements below WCAG AA threshold (min 1.0:1).

    ✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

    ✅ Strong hierarchy: Headlines are 3.0x larger than body text.

    GGoogle FontsBuy on MyFontsFluid Type (rem)Flesch 38

    Color Palette

    11 unique colors
    Light
    #ffffff
    Background· 21.2%
    #19224b
    Primary· 18%
    #6c5abe
    Secondary· 13.7%
    #925eca
    Secondary· 11.3%
    #454e9d
    Secondary· 8.8%
    #173466
    Accent· 8.1%
    #343a69
    Secondary· 5.2%
    #977dba
    Secondary· 5%

    Business & Marketing Stack

    1 Tools Detected

    Growing

    Behavior Analytics

    1
    Google AnalyticsFree

    User behavior and product analytics

    1

    Categories

    1

    Total Tools

    0

    Enterprise

    0

    Mid-Market

    Assessment: Growing marketing technology adoption

    Sponsored

    Scripts & Styles

    8 Resources

    4
    Scripts
    4
    Styles
    0
    Async
    1
    Defer

    Top Script Sources

    local(3)static.cloudflareinsights.com(1)

    Website Identity

    Iftaregistr CZ

    Iftaregistr CZ

    Organization
    www.iftaregistr.cz/
    2 years old
    Location detected: 🇨🇿 Czech Republicvia tld
    REG-KEYSYSTEMScs

    Sponsored

    Last analyzed: 12 May 2026 at 03:54

    Historical Analysis & Change Tracking