Back to Search
zim.vn favicon

zim.vn

https://zim.vn· First analyzed 22 May 2026· Updated 22 May 2026
Export
zim.vn
Desktop screenshot of zim.vn
Mobile screenshot of zim.vn
Mobile

Sponsored

Hosting Provider

Vietnam Internet Network Information Center

IP Address

42.1.71.6

Site Location

🇻🇳 Vietnamvia tld

Server Location

🇻🇳 Hanoi, Vietnam

ASN

AS131429

Organization

Vietnam Internet Network Information Center

CDN

CDN

Nameservers

wally.ns.cloudflare.com.trey.ns.cloudflare.com.

Performance

79

Core Web Vitals

Weight

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

Image Optimization

WebPAVIFResponsiveVercel Image Optimization
0–49
50–89
90–100

Architecture Stack

Hybrid
⚡ SSG
Frontend
Framework
Next.js
Styling
Tailwind CSS
Infrastructure
Hosting
Vietnam Internet Network Information Center
CDN
CDN

Technology Stack

9 Technologies Detected

Analytics

4
Google Analytics
Google Analytics 4
Facebook PixelMicrosoft Clarity

Meta Frameworks

1
Next.js

Other

1
D3.js

CSS Frameworks

1
Tailwind CSS

Tag Managers

1
Google Tag Manager

Advertising

1
TikTok Pixel

SEO Analysis

A80/100
23
7
0
Meta Tags13/15
Content10/12
Headings8/8
Technical24/25
E-E-A-T3/7
Images4/7
Links5/5
URL5/5
Social4/5
Freshness0/4
Mobile1/4
Indexability3/3
Z
zim.vnzim.vn

Anh Ngữ ZIM - Học Tiếng Anh cá nhân hoá & luyện thi chứng chỉ

Luyện thi IELTS, TOEIC, SAT, PTE, VSTEP và Tiếng Anh Giao Tiếp cam kết đầu ra với phương pháp học tập cá nhân hoá, rút ngắn 80% thời gian tự học và đạt điểm ...

Description truncated.
Title Length61 chars

Recommended: 50-60 chars (~372px / 580px)

Description Length169 chars

Recommended: 120-160 chars

Issues (0)

    7 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: standard

    5,000 URLs

    robots.txt

    31 rules

    Sitemap reference found

    Local SEO

    Local Search Readiness

    28/100
    Needs Work
    8 8 1

    Sponsored

    AI & LLM Readiness

    D58/100
    Bot Access
    22/25
    Machine Read.
    7/25
    Schema Data
    14/25
    Citation
    15/25

    AI Bot Access

    12/14 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.txtvalid
    llms-full.txt
    Semantic HTML
    Heading Hierarchy
    nav
    Text ratio:4%
    Words:5,103
    Token eff.:Excessive
    Depth:1/5

    Structured Data

    5 JSON-LD
    Person×1.3Organization×1.1WebSiteLocalBusiness×1.1ProductSearchAction
    sameAs entity links

    Citation Readiness

    Opening Summary11w
    Descriptive Headingsavg 6w
    Canonical URL
    Open Graph3/3
    Twitter Card1/3
    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.
    A
    80/100
    14
    Passed
    1
    Critical
    2
    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
    11/15
    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.
    3 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.
    35/100
    F
    601 mg
    CO₂e / view
    4.7 MB
    Page Weight
    15%
    Cleaner Than
    New Visitor
    687 mg
    vs
    Returning (cached)
    344 mg
    Annual (10K/mo)
    72.1 kg
    Emission Segments
    Data Center
    134 mg
    Network
    144 mg
    Device
    323 mg
    Resource Breakdown
    JavaScript
    1.0 MB
    Images
    329.5 KB
    CSS
    135.2 KB
    Fonts
    1.4 MB
    HTML
    89.7 KB
    Other
    1.8 MB
    Green Hosting Not Verified
    Vietnam Internet Network Information Center
    5 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    A+

    Security Score

    95%Excellent
    Static / Informational

    HTTPS

    No WAF

    175d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Sectigo Limited

    Key Algorithm

    RSA (2048 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2

    Valid From

    29.04.2026

    Valid Until

    13.11.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (2)

    *.zim.vnzim.vn

    SHA-256 Fingerprint

    01:E5:5D:22:17:A5:A6:82:30:43:CE:F7:9C:CC:3B:E4:FD:84:61:1E...

    Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    access-control-allow-origin
    *
    cache-control
    ⚪ Custom(s-maxage=86400, stale-while-revalidate)
    content-encoding
    📦 Gzip(gzip)
    content-type
    text/html; charset=utf-8
    date
    Fri, 22 May 2026 21:04:30 GMT
    etag
    "1zufogfj9pewsn"
    Good Warning Issue

    Email Infrastructure

    Google Workspace

    Score

    20

    SPF
    DKIM
    DMARC

    MX Records (5)

    alt4.aspmx.l.google.com
    alt1.aspmx.l.google.com
    alt2.aspmx.l.google.com
    aspmx.l.google.com

    +1 more

    Domain Information

    zim.vn

    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
    78/100
    Mobile Friendly6 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
    width=device-width, initial-scale=1, shrink-to-fit=no, viewport-fit=cover
    2 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    __jakartaFont_37dc3e + __robotoFont_c7ac1e

    WCAG Partial
    74/100
    Readability
    /30
    22/30

    16px · LH 1.50

    Hierarchy
    /20
    20/20

    2.5x ratio · ✓ H1→H6

    WCAG
    /25
    16/25

    3.25:1 min contrast

    Performance
    /25
    16/25

    2 fonts · 25 req

    Heading Font

    __jakartaFont_37dc3e

    Sans40px

    Body Font

    __robotoFont_c7ac1e

    Sans16px

    Contrast Ratio

    3.25:1

    7 issues

    Reading Comfort

    ~135 CPL

    Too wide
    40px
    h1
    36px
    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).

    ❌ Very long lines: ~135 chars/line causes eye strain. Add max-width constraint.

    ✅ Easy to read: Flesch score 90/100 — accessible to general audiences.

    ⚠️ Partial contrast: 7 elements below WCAG AA threshold (min 3.2:1).

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

    Buy on MyFontsFlesch 91

    Color Palette

    6 unique colors
    3.71:1 AA Large Light
    #ffffff
    Background· 75.3%
    #878483
    Other· 9.9%
    #15171d
    Primary· 4.7%
    #755051
    Secondary· 4.5%
    #c0c5cb
    Secondary· 3.7%
    #4f7ba6
    Secondary· 1.9%

    Business & Marketing Stack

    6 Tools Detected

    Enterprise

    Behavior Analytics

    3
    Google Tag ManagerFree
    Microsoft ClarityFree
    Google AnalyticsFree

    User behavior and product analytics

    Advertising

    2
    Facebook PixelMid-Market
    TikTok PixelMid-Market

    Ad platforms and retargeting pixels

    Social Media

    1
    Facebook SDKFree

    Social widgets and sharing tools

    3

    Categories

    6

    Total Tools

    0

    Enterprise

    2

    Mid-Market

    Assessment: Sophisticated marketing and sales technology infrastructure

    Sponsored

    Scripts & Styles

    30 Resources

    20
    Scripts
    10
    Styles
    4
    Async
    16
    Defer

    Top Script Sources

    local(16)clarity.ms(1)googletagmanager.com(1)analytics.tiktok.com(1)connect.facebook.net(1)

    Website Identity

    Anh Ngữ ZIM

    Anh Ngữ ZIM

    EducationalOrganization

    Luyện thi IELTS, TOEIC, SAT, PTE, VSTEP và Tiếng Anh Giao Tiếp cam kết đầu ra với phương pháp học tập cá nhân hoá, rút ngắn 80% thời gian tự học và đạt điểm số mục tiêu.

    [email protected]
    19002833
    Location detected: 🇻🇳 Vietnamvia tld
    📧 Google WorkspaceviEst. 2016

    Sponsored

    Last analyzed: 22 May 2026 at 21:05

    Historical Analysis & Change Tracking