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java4k.com

https://java4k.com· First analyzed 29 May 2026· Updated 29 May 2026
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java4k.com
Desktop screenshot of java4k.com
Mobile screenshot of java4k.com
Mobile

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Hosting Provider

Cloudflare
cloudflare.com

IP Address

172.67.212.94

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

gabe.ns.cloudflare.com.tina.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
641 ms10%
Speed Index
833 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
830 KB
64 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Cloudflare
CDN
Cloudflare

Progressive Web App

Web ManifestApple Touch Icon

Technology Stack

3 Technologies Detected

CSS Frameworks

1
Tailwind CSS

Fonts

1
Google Fonts

CDN

1
Cloudflare

SEO Analysis

A+91/100
29
2
0
Meta Tags10/15
Content12/12
Headings8/8
Technical24/25
E-E-A-T7/7
Images6/7
Links5/5
URL5/5
Social5/5
Freshness2/4
Mobile4/4
Indexability3/3
J
java4k.comjava4k.com

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Title Length34 chars

Recommended: 50-60 chars (~206px / 580px)

Description Length89 chars

Recommended: 120-160 chars

Issues (0)

    2 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: standard

    10 URLs

    robots.txt

    3 rules

    Sitemap reference found

    Allows all crawlers

    Local SEO

    Local Search Readiness

    19/100
    Poor
    5 12 1

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

    Sponsored

    AI & LLM Readiness

    B72/100
    Bot Access
    20/25
    Machine Read.
    14/25
    Schema Data
    18/25
    Citation
    20/25

    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
    header/footer
    Text ratio:18%
    Words:2,078
    Token eff.:Optimal
    Sections/1K:12
    Depth:1/5

    Structured Data

    5 JSON-LD
    FAQPage×1.5Article×1.2Person×1.3(min)Organization×1.1WebSiteProductBreadcrumbList

    Citation Readiness

    Opening Summary35w
    Descriptive Headingsavg 4.2w
    Canonical URL
    Open Graph2/3
    Twitter Card3/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (7)
    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.
    B
    75/100
    10
    Passed
    1
    Critical
    1
    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
    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.
    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.
    60/100
    B
    84 mg
    CO₂e / view
    830.3 KB
    Page Weight
    80%
    Cleaner Than
    New Visitor
    96 mg
    vs
    Returning (cached)
    48 mg
    Annual (10K/mo)
    10.1 kg
    Emission Segments
    Data Center
    4 mg
    Network
    25 mg
    Device
    55 mg
    Resource Breakdown
    JavaScript
    1.5 KB
    Images
    793.8 KB
    CSS
    17.8 KB
    Fonts
    2.0 KB
    HTML
    15.2 KB
    Green Hosting Verified
    Cloudflare
    GWF Verified
    5 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    F

    Security Score

    26%Critical
    Interactive

    HTTPS

    WAF

    88d

    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

    28.05.2026

    Valid Until

    26.08.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (2)

    java4k.com*.java4k.com

    SHA-256 Fingerprint

    B8:30:A0:9C:8D:14:8B:D7:ED:40:77:B5:F7:9E:F0:09:9D:D1:29:05...

    Top 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🇺🇸 Dallas
    a038ec331c1d9d66-DFW
    content-encoding
    zstd
    content-type
    text/html; charset=UTF-8
    date
    Fri, 29 May 2026 22:26:47 GMT
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    0

    SPF
    DKIM
    DMARC

    Domain Information

    java4k.com

    Domain Age
    18y 6m

    Created

    16.11.2007

    Expires

    16.11.2026

    Last Updated

    29.10.2025

    Registrar

    Dynadot Inc

    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.
    B
    72/100
    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

    -apple-system

    WCAG Partial
    78/100
    Readability
    /30
    28/30

    16px · LH 1.50

    Hierarchy
    /20
    14/20

    1.88x ratio · ✓ H1→H6

    WCAG
    /25
    14/25

    1.07:1 min contrast

    Performance
    /25
    22/25

    System fonts

    Heading Font

    -apple-system

    Sans30px

    Body Font

    -apple-system

    Sans16px

    Contrast Ratio

    1.07:1

    7 issues

    Reading Comfort

    ~41 CPL

    Narrow lines
    30px
    h1
    24px
    h2
    24px
    h3
    16px
    p

    ✅ Excellent readability: 16px body text is ideal for all devices.

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

    ✅ Easy to read: Flesch score 82/100 — accessible to general audiences.

    ⚠️ Partial contrast: 7 elements below WCAG AA threshold (min 1.1:1).

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

    ✅ System fonts: Zero font loading delay — best possible LCP impact.

    GGoogle FontsFlesch 82

    Color Palette

    8 unique colors
    Light
    #c1c7ca
    Secondary· 6.5%
    #e9eef2
    Background· 44.50000000000001%
    #0e2a4d
    Accent· 15.6%
    #1e4367
    Accent· 9.8%
    #1a5883
    Primary· 7.8%
    #d9e1e5
    Secondary· 6.6%
    #94ab9a
    Secondary· 5.5%

    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

    4 Resources

    2
    Scripts
    2
    Styles
    0
    Async
    1
    Defer

    Top Script Sources

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

    Website Identity

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    Product

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    java4k.com/
    18 years old
    Location detected: 🇨🇦 Canadavia ip
    Dynadot Incko-KR

    Sponsored

    Last analyzed: 29 May 2026 at 22:26

    Historical Analysis & Change Tracking