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chmi.cz

https://chmi.cz· First analyzed 29 Apr 2026· Updated 29 Apr 2026
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chmi.cz
Desktop screenshot of chmi.cz
Mobile screenshot of chmi.cz
Mobile

Sponsored

Hosting Provider

HC Nagano

IP Address

90.183.101.70

Site Location

🇨🇿 Czech Republicvia tld

Server Location

🇨🇿 Prague, Czechia

ASN

AS5610

Organization

HC Nagano

Server

Apache

CDN

Proxy Cache

Nameservers

ns1.chmi.cz.ns2.chmi.cz.

Performance

84

Core Web Vitals

Weight

First Contentful Paint
1.8 s10%
Speed Index
2.4 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
3.3 MB
250 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Bootstrap
Infrastructure
Hosting
HC Nagano
CDN
Proxy Cache

Technology Stack

10 Technologies Detected

Analytics

3
Google Analytics
Google Analytics 4
Microsoft Clarity

Frameworks

1
React

Libraries

1
jQueryv3.7.1

UI Components

1
Lightbox

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

Tag Managers

1
Google Tag Manager

Web Servers

1
Apache

SEO Analysis

C62/100
19
9
0
Meta Tags5/15
Content8/12
Headings7/8
Technical19/25
E-E-A-T0/7
Images3/7
Links5/5
URL5/5
Social3/5
Freshness0/4
Mobile4/4
Indexability3/3
C
chmi.czchmi.cz

Úvod

Úvodní stránka Českého hydrometeorologického ústav​​​​​u

Title Length4 chars

Recommended: 50-60 chars (~24px / 580px)

Description Length56 chars

Recommended: 120-160 chars

Issues (0)

    9 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: index

    601 URLs

    601 sub-sitemaps

    robots.txt

    15 rules

    Sitemap reference found

    Local SEO

    Local Search Readiness

    15/100
    Poor
    4 11 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.
    10/25
    Schema Data
    0/25
    Citation
    9/25

    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:1%
    Words:1,643
    Token eff.:Optimal
    Sections/1K:25
    Depth:1/5

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary
    Descriptive Headingsavg 3.5w
    Canonical URL
    Open Graph3/3
    Twitter Card0/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (11)
    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.
    C
    66/100
    9
    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
    17/20
    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
    5/15
    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...
    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.
    16/100
    F
    414 mg
    CO₂e / view
    3.3 MB
    Page Weight
    30%
    Cleaner Than
    New Visitor
    473 mg
    vs
    Returning (cached)
    237 mg
    Annual (10K/mo)
    49.7 kg
    Emission Segments
    Data Center
    92 mg
    Network
    99 mg
    Device
    222 mg
    Resource Breakdown
    JavaScript
    802.9 KB
    Images
    1.9 MB
    CSS
    332.6 KB
    HTML
    163.3 KB
    Other
    92.1 KB
    Green Hosting Not Verified
    HC Nagano
    8 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    A

    Security Score

    86%Very Good
    Interactive

    HTTPS

    No WAF

    312d

    Certificate Details

    Type

    Organization Validated (OV)

    Certificate Authority

    DigiCert Inc

    Key Algorithm

    RSA (2048 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2

    Valid From

    04.02.2026

    Valid Until

    07.03.2027

    OCSP Stapling

    Enabled

    Subject Alternative Names (2)

    *.chmi.czchmi.cz

    SHA-256 Fingerprint

    45:56:95:7B:D6:BE:44:3F:D4:5A:F3:08:63:66:8B:8D:47:94:E0:9F...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    access-control-allow-credentials
    true
    access-control-allow-headers
    Authorization, Content-Type, X-Requested-With
    access-control-expose-headers
    Location, X-Total-Count
    content-encoding
    📦 Gzip(gzip)
    content-security-policy
    font-src 'self'; object-src 'self'; form-action 'self' https...
    content-type
    text/html;charset=UTF-8
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    65

    SPF
    DKIM
    DMARC

    DMARC Policy

    None (Monitor Only)

    MX Records (1)

    frailea.chmi.cz

    Domain Information

    chmi.cz

    Domain Age
    29y 1m

    Created

    20.03.1997

    Expires

    09.10.2028

    Last Updated

    29.12.2022

    Registrar

    REG-INTERNET-CZ

    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.
    B
    75/100
    Mobile Friendly11 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
    initial-scale=1.0, width=device-width
    2 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Campton Bold + Campton Book

    WCAG Partial
    72/100
    Readability
    /30
    25/30

    16px · LH 1.50

    Hierarchy
    /20
    15/20

    2.6x ratio

    WCAG
    /25
    12/25

    3.55:1 min contrast

    Performance
    /25
    20/25

    2 fonts · 2 req

    Heading Font

    Campton Bold

    Sans42px

    Body Font

    Campton Book

    Sans16px

    Contrast Ratio

    3.55:1

    5 issues

    Reading Comfort

    ~43 CPL

    Narrow lines
    42px
    h1
    34px
    h2
    26px
    h3
    10px
    h4
    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 35/100. Simplify sentences for wider reach.

    ⚠️ Partial contrast: 5 elements below WCAG AA threshold (min 3.5:1).

    ❌ Broken heading hierarchy: 2 level skip(s). Screen readers rely on sequential headings (h1→h2→h3).

    ✅ Strong hierarchy: Headlines are 2.6x larger than body text.

    Buy on MyFontsFlesch 35

    Color Palette

    9 unique colors
    2.78:1 Fail Light
    #ffffff
    Background· 52.19999999999999%
    #969d96
    Other· 5.3%
    #13387f
    Primary· 12%
    #b8bfaf
    Secondary· 10.3%
    #a2b79f
    Secondary· 6.5%
    #424d52
    Text· 5.4%
    #e6e6dc
    Secondary· 4%
    #d1c8a4
    Secondary· 3.4%

    Business & Marketing Stack

    3 Tools Detected

    Growing

    Behavior Analytics

    3
    Google Tag ManagerFree
    Google AnalyticsFree
    Microsoft ClarityFree

    User behavior and product analytics

    1

    Categories

    3

    Total Tools

    0

    Enterprise

    0

    Mid-Market

    Assessment: Growing marketing technology adoption

    Sponsored

    Scripts & Styles

    30 Resources

    20
    Scripts
    10
    Styles
    11
    Async
    5
    Defer

    Top Script Sources

    local(10)chmi.cz(5)googletagmanager.com(2)scripts.clarity.ms(1)clarity.ms(1)

    Website Identity

    chmi.cz

    chmi@chmi.cz
    29 years old
    Location detected: 🇨🇿 Czech Republicvia tld
    REG-INTERNET-CZcs-CZ

    Sponsored

    Last analyzed: 29 Apr 2026 at 13:24

    Historical Analysis & Change Tracking