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ketcau.com

https://ketcau.com· First analyzed 30 Apr 2026· Updated 30 Apr 2026
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ketcau.com
Desktop screenshot of ketcau.com
Mobile screenshot of ketcau.com
Mobile

Sponsored

Hosting Provider

NhanHoa Software company

IP Address

103.124.93.211

Site Location

🇻🇳 Vietnamvia ip

Server Location

🇻🇳 Đống Đa, Vietnam

ASN

AS131353

Organization

NhanHoa Software company

Server

Apache

Nameservers

ns1.zonedns.vn.ns3.zonedns.vn.ns2.zonedns.vn.

Performance

97

Core Web Vitals

Weight

First Contentful Paint
1.0 s10%
Speed Index
1.3 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
5.4 MB
52 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
NhanHoa Software company

Technology Stack

5 Technologies Detected

Libraries

2
jQueryv3.5.1
jQuery UI

CSS Frameworks

1
Tailwind CSS

Web Servers

1
Apachev2

Customer Support

1
Zendesk

SEO Analysis

C64/100
16
9
0
Meta Tags10/15
Content12/12
Headings4/8
Technical15/21
E-E-A-T0/7
Images4/7
Links5/5
URL5/5
Social2/5
Freshness0/4
Mobile4/4
Indexability3/3
K
ketcau.comketcau.com

KETCAU.COM - Diễn đàn Xây Dựng của các Kỹ sư kết cấu Việt Nam

Diễn Đàn Xây dựng - Nơi hội tụ của các kỹ sư kết cấu, địa kỹ thuật công trình Việt Nam

Title Length67 chars

Recommended: 50-60 chars (~417px / 580px)

Description Length86 chars

Recommended: 120-160 chars

Issues (0)

    9 issues found

    Upgrade to view details

    Local SEO

    Local Search Readiness

    6/100
    Poor
    2 13 2

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

    Sponsored

    AI & LLM Readiness

    F34/100
    Bot Access
    20/25
    Machine Read.
    7/25
    Schema Data
    0/25
    Citation
    7/25

    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:12%
    Words:7,466
    Token eff.:Excessive
    Depth:1/5

    Structured Data

    Microdata

    Citation Readiness

    Opening Summary
    Descriptive Headings
    Canonical URL
    Open Graph1/3
    Twitter Card0/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (10)
    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
    10
    Passed
    3
    Critical
    2
    Warnings
    Images & Alt Text
    15/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    18/20
    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
    9/15
    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
    678 mg
    CO₂e / view
    5.4 MB
    Page Weight
    5%
    Cleaner Than
    New Visitor
    775 mg
    vs
    Returning (cached)
    387 mg
    Annual (10K/mo)
    81.3 kg
    Emission Segments
    Data Center
    151 mg
    Network
    163 mg
    Device
    364 mg
    Resource Breakdown
    JavaScript
    185.5 KB
    Images
    5.0 MB
    CSS
    53.9 KB
    HTML
    34.4 KB
    Other
    63.2 KB
    Green Hosting Not Verified
    NhanHoa Software company
    7 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    F

    Security Score

    10%Critical
    Critical / Transactional

    HTTPS

    No WAF

    319d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Sectigo Limited

    Key Algorithm

    RSA (2048 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.2

    HTTP Protocol

    HTTP/2

    Valid From

    23.02.2026

    Valid Until

    15.03.2027

    OCSP Stapling

    Enabled

    Subject Alternative Names (2)

    ketcau.comwww.ketcau.com

    SHA-256 Fingerprint

    43:7E:1B:C0:BB:EB:F5:85:81:8D:2E:8D:42:2D:8A:2C:5E:49:81:18...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    cache-control
    🔴 No Cache(no-store, no-cache, must-revalidate)
    content-encoding
    📦 Gzip(gzip)
    content-length
    34939
    content-security-policy
    frame-ancestors 'self'
    content-type
    text/html; charset=UTF-8
    date
    Thu, 30 Apr 2026 01:46:21 GMT
    Good Warning Issue

    Email Infrastructure

    Google Workspace

    Score

    20

    SPF
    DKIM
    DMARC

    MX Records (3)

    ALT1.ASPMX.L.GOOGLE.com
    ASPMX.L.GOOGLE.com
    ASPMX2.GOOGLEMAIL.com

    Domain Information

    ketcau.com

    Domain Age
    21y 11m

    Created

    08.06.2004

    Expires

    08.06.2035

    Last Updated

    11.06.2025

    Registrar

    Nhan Hoa Software Company Ltd.

    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
    57/100
    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, viewport-fit=cover
    3 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Helvetica

    WCAG Partial
    57/100
    Readability
    /30
    14/30

    13px · LH --

    Hierarchy
    /20
    13/20

    1.23x ratio

    WCAG
    /25
    16/25

    1.03:1 min contrast

    Performance
    /25
    14/25

    1 font

    Heading Font

    Helvetica

    Sans16px

    Body Font

    Helvetica

    Sans13px

    Contrast Ratio

    1.03:1

    9 issues

    Reading Comfort

    Single Font Family

    left aligned
    16px
    h1
    13px
    p

    ❌ Critical: 13px body text is too small. Minimum 14px, recommend 16px+.

    ⚠️ Partial contrast: 9 elements below WCAG AA threshold (min 1.0:1).

    ⚠️ Minor heading issue: 0 level skip(s) detected. Maintain sequential order for screen readers.

    ⚠️ Weak hierarchy: Headlines should be ≥2x body size for clear visual structure.

    ✅ 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 59

    Color Palette

    6 unique colors
    Light
    #ffffff
    Background· 50%
    #e4e6e9
    Primary· 27.799999999999997%
    #6b80a1
    Secondary· 7.1%
    #a3b6c4
    Secondary· 6%
    #2e4254
    Secondary· 4.7%

    Business & Marketing Stack

    2 Tools Detected

    Growing

    Behavior Analytics

    1
    Google AnalyticsFree

    User behavior and product analytics

    Social Media

    1
    Facebook SDKFree

    Social widgets and sharing tools

    2

    Categories

    2

    Total Tools

    0

    Enterprise

    0

    Mid-Market

    Assessment: Growing marketing technology adoption

    Sponsored

    Scripts & Styles

    11 Resources

    5
    Scripts
    6
    Styles
    0
    Async
    0
    Defer

    Top Script Sources

    js(3)scriptapi.dev(1)ajax.googleapis.com(1)

    Website Identity

    ketcau.com

    21 years old
    Location detected: 🇻🇳 Vietnamvia ip
    Nhan Hoa Software Company Ltd.📧 Google Workspaceen

    Social Profiles

    FacebookX (Twitter)

    Sponsored

    Last analyzed: 30 Apr 2026 at 01:46

    Historical Analysis & Change Tracking