StackOptic
Back to Search
zix.vn favicon

zix.vn

https://zix.vn· First analyzed 10 May 2026· Updated 10 May 2026
Export
zix.vn
Desktop screenshot of zix.vn
Mobile screenshot of zix.vn
Mobile

Sponsored

Hosting Provider

SPT

IP Address

116.118.48.234

Site Location

🇻🇳 Vietnamvia tld

Server Location

🇻🇳 Hanoi, Vietnam

ASN

AS63760

Server

Nginx

Nameservers

ns1.digitalocean.com.ns2.digitalocean.com.ns3.digitalocean.com.

Performance

94

Core Web Vitals

Weight

First Contentful Paint
1.2 s10%
Speed Index
1.6 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
870 KB
50 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
SPT

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

6 Technologies Detected

CSS Frameworks

2
Tailwind CSS
Normalize.css

Analytics

2
Google Analytics
Google Analytics 4

Icon Libraries

1
Font Awesome

Web Servers

1
Nginx

SEO Analysis

B72/100
22
8
0
Meta Tags8/15
Content11/12
Headings5/8
Technical17/25
E-E-A-T3/7
Images6/7
Links5/5
URL5/5
Social3/5
Freshness2/4
Mobile4/4
Indexability3/3
Z
zix.vnzix.vn

Zix.vn - Học online chất lượng cao

Trang học online chất lượng cao của học sinh Việt Nam.

Title Length34 chars

Recommended: 50-60 chars (~199px / 580px)

Description Length54 chars

Recommended: 120-160 chars

Issues (0)

    8 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: index

    8 URLs

    8 sub-sitemaps

    robots.txt

    30 rules

    Local SEO

    Local Search Readiness

    7/100
    Poor
    2 14 2

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

    Sponsored

    AI & LLM Readiness

    D47/100
    Bot Access
    19/25
    Machine Read.
    10/25
    Schema Data
    3/25
    Citation
    15/25

    AI Bot Access

    13/14 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
    def. listsnavheader/footer
    Text ratio:6%
    Words:1,244
    Token eff.:Optimal
    Sections/1K:6.4
    Depth:3/5

    Structured Data

    1 JSON-LD
    WebSiteSearchAction

    Citation Readiness

    Opening Summary117w
    Descriptive Headingsavg 3.8w
    Canonical URL
    Open Graph3/3
    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.
    B
    73/100
    11
    Passed
    5
    Critical
    1
    Warnings
    Images & Alt Text
    18/20
    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
    7/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    6/15
    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.
    53/100
    B
    108 mg
    CO₂e / view
    869.8 KB
    Page Weight
    80%
    Cleaner Than
    New Visitor
    123 mg
    vs
    Returning (cached)
    62 mg
    Annual (10K/mo)
    12.9 kg
    Emission Segments
    Data Center
    24 mg
    Network
    26 mg
    Device
    58 mg
    Resource Breakdown
    JavaScript
    674.3 KB
    Images
    107.8 KB
    CSS
    10.2 KB
    HTML
    16.7 KB
    Other
    60.8 KB
    Green Hosting Not Verified
    SPT
    5 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    D

    Security Score

    56%Poor
    Interactive

    HTTPS

    No WAF

    61d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Let's Encrypt

    Key Algorithm

    RSA (2048 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.2

    HTTP Protocol

    HTTP/2

    Valid From

    11.04.2026

    Valid Until

    10.07.2026

    Subject Alternative Names (2)

    www.zix.vnzix.vn

    SHA-256 Fingerprint

    E0:08:86:47:C8:41:CD:76:70:5F:9D:3D:3C:D2:55:22:8B:1A:C2:05...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    cache-control
    🔴 No Cache(private, no-cache, max-age=0)
    content-encoding
    📦 Gzip(gzip)
    content-length
    16805
    content-type
    text/html; charset=utf-8
    date
    Sun, 10 May 2026 09:19:21 GMT
    expires
    Thu, 19 Nov 1981 08:52:00 GMT
    Good Warning Issue

    Email Infrastructure

    Yandex Mail

    Score

    45

    SPF
    DKIM
    DMARC

    MX Records (1)

    mx.yandex.net

    Domain Information

    zix.vn

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Cookie Consent Banner
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Privacy policy page linked

    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.
    A
    82/100
    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

    Typography & Readability

    Segoe UI

    WCAG AA
    69/100
    Readability
    /30
    15/30

    13px · LH 1.80

    Hierarchy
    /20
    10/20

    1.69x ratio

    WCAG
    /25
    22/25

    6.48:1 min contrast

    Performance
    /25
    22/25

    System fonts

    Heading Font

    Segoe UI

    Sans22px

    Body Font

    Segoe UI

    Sans13px

    Contrast Ratio

    6.48:1

    WCAG AA (≥4.5:1)

    Reading Comfort

    Single Font Family

    left aligned
    22px
    h1
    18px
    h3
    13px
    p

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

    ✅ Easy to read: Flesch score 89/100 — accessible to general audiences.

    ✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 6.5:1).

    ⚠️ Minor heading issue: 1 level skip(s) detected. Maintain sequential order for screen readers.

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

    Flesch 89

    Color Palette

    4 unique colors
    Light
    #ffffff
    Primary· 80.4%
    #a69f8e
    Secondary· 4.4%

    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

    23 Resources

    13
    Scripts
    10
    Styles
    3
    Async
    7
    Defer

    Top Script Sources

    local(9)googletagmanager.com(2)google-analytics.com(1)cdn.jsdelivr.net(1)

    Website Identity

    zix.vn

    Location detected: 🇻🇳 Vietnamvia tld
    📧 Yandex Mailvi-VN

    Social Profiles

    Pinterest

    Sponsored

    Last analyzed: 10 May 2026 at 09:19

    Historical Analysis & Change Tracking