StackOptic
Back to Search
tailieu.vn favicon

tailieu.vn

https://tailieu.vn· First analyzed 16 May 2026· Updated 16 May 2026
Export
tailieu.vn
Desktop screenshot of tailieu.vn
Mobile screenshot of tailieu.vn
Mobile

Sponsored

Hosting Provider

VNPT

IP Address

14.225.236.180

Site Location

🇻🇳 Vietnamvia tld

Server Location

🇻🇳 Hanoi, Vietnam

ASN

AS135905

Organization

VNPT

Server

Nginx

Nameservers

ns1.vdoc.com.vn.ns2.vdoc.com.vn.

Performance

97

Core Web Vitals

Weight

First Contentful Paint
955 ms10%
Speed Index
1.2 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.7 MB
108 requests

Image Optimization

Responsive
0–49
50–89
90–100

Architecture Stack

Hybrid
⚙️ SSR
Frontend
Framework
Nuxt.js
Infrastructure
Hosting
VNPT

Technology Stack

8 Technologies Detected

Analytics

3
Google Analytics
Google Analytics 4
Google Tag Manager

Meta Frameworks

1
Nuxt.js

CSS Frameworks

1
Tailwind CSS

Web Servers

1
Nginxv1.18.0

Libraries

1
Swiper

Security

1
reCAPTCHA

SEO Analysis

B75/100
22
5
0
Meta Tags11/15
Content5/12
Headings8/8
Technical23/25
E-E-A-T2/7
Images5/7
Links5/5
URL5/5
Social5/5
Freshness0/4
Mobile3/4
Indexability3/3
T
tailieu.vntailieu.vn

TaiLieu.VN: Kho Tài Liệu Học Tập, Luận Văn, Đề Thi, Giáo Án & Biểu Mẫu

Thư viện hàng triệu tài liệu học tập, luận văn, giáo án, đề thi, tiểu luận, ebook, sáng kiến kinh nghiệm, biểu mẫu văn bản và báo cáo. Tải tài liệu miễn phí ...

Description truncated.
Title Length70 chars

Recommended: 50-60 chars (~413px / 580px)

Description Length172 chars

Recommended: 120-160 chars

Issues (0)

    5 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: index

    4 URLs

    4 sub-sitemaps

    robots.txt

    35 rules

    Sitemap reference found

    Local SEO

    Local Search Readiness

    14/100
    Poor
    4 13

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

    Sponsored

    AI & LLM Readiness

    D43/100
    Bot Access
    20/25
    Machine Read.
    7/25
    Schema Data
    5/25
    Citation
    11/25

    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
    Text ratio:1%
    Words:1,308
    Token eff.:Optimal

    Structured Data

    2 JSON-LD
    Organization×1.1SearchAction
    sameAs entity links

    Citation Readiness

    Opening Summary
    Descriptive Headingsavg 6.9w
    Canonical URL
    Open Graph3/3
    Twitter Card3/3
    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
    15/20
    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
    14/15
    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
    9/15
    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.
    30/100
    D
    215 mg
    CO₂e / view
    1.7 MB
    Page Weight
    60%
    Cleaner Than
    New Visitor
    245 mg
    vs
    Returning (cached)
    123 mg
    Annual (10K/mo)
    25.7 kg
    Emission Segments
    Data Center
    48 mg
    Network
    52 mg
    Device
    115 mg
    Resource Breakdown
    JavaScript
    197.0 KB
    Images
    1.4 MB
    CSS
    8.5 KB
    HTML
    87.1 KB
    Other
    439 B
    Green Hosting Not Verified
    VNPT
    4 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    C

    Security Score

    61%Fair
    Interactive

    HTTPS

    No WAF

    72d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Let's Encrypt

    Key Algorithm

    ECDSA (secp256r1) (256 bit)

    Signature

    ECDSA with SHA-384

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2

    Valid From

    29.04.2026

    Valid Until

    28.07.2026

    Subject Alternative Names (1)

    tailieu.vn

    SHA-256 Fingerprint

    66:40:85:28:7B:6E:72:B2:38:8E:6B:3D:9D:A8:47:07:8B:E0:74:E0...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    content-encoding
    📦 Gzip(gzip)
    content-type
    text/html;charset=utf-8
    date
    Sat, 16 May 2026 15:17:40 GMT
    referrer-policy
    strict-origin-when-cross-origin
    server
    nginx/1.18.0 (Ubuntu)
    strict-transport-security
    max-age=31536000; includeSubDomains; preload
    Good Warning Issue

    Email Infrastructure

    Google Workspace

    Score

    70

    SPF
    DKIM
    DMARC

    MX Records (7)

    ALT1.ASPMX.L.GOOGLE.COM
    ASPMX.L.GOOGLE.COM
    ALT2.ASPMX.L.GOOGLE.COM
    ASPMX5.GOOGLEMAIL.COM

    +3 more

    Domain Information

    tailieu.vn

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Cookie Consent Banner
    Privacy Policy
    Terms of Service

    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.
    C
    65/100
    Mobile Friendly130 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, maximum-scale=1, user-scalable=no
    3 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Plus Jakarta Sans

    WCAG Partial
    66/100
    Readability
    /30
    17/30

    16px · LH 1.00

    Hierarchy
    /20
    17/20

    1.5x ratio · ✓ H1→H6

    WCAG
    /25
    18/25

    1:1 min contrast

    Performance
    /25
    14/25

    1 font

    Heading Font

    Plus Jakarta Sans

    Sans24px

    Body Font

    Plus Jakarta Sans

    Sans16px

    Contrast Ratio

    1:1

    2 issues

    Reading Comfort

    Single Font Family

    left aligned
    24px
    h1
    20px
    h2
    16px
    h3

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

    ⚠️ Tight line spacing (1.00). Increase to 1.4–1.6 for better readability.

    ❌ Very complex text: Flesch score 20/100. Consider shorter sentences and simpler words.

    ⚠️ Partial contrast: 2 elements below WCAG AA threshold (min 1.0:1).

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

    ✅ Lean font stack: 1 font families keeps load times fast.

    Buy on MyFontsFlesch 20

    Color Palette

    9 unique colors
    Light
    #fbead5
    Primary· 38.5%
    #fbcec9
    Accent· 15.600000000000001%
    #114e8b
    Accent· 10.5%
    #2a2a60
    Secondary· 9.2%
    #3796b5
    Accent· 7.3%
    #b5ae99
    Secondary· 5.7%
    #f2b74f
    Accent· 5.6%
    #e5dfd1
    Secondary· 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

    7 Resources

    2
    Scripts
    5
    Styles
    0
    Async
    1
    Defer

    Top Script Sources

    local(1)googletagmanager.com(1)

    Website Identity

    TaiLieu.VN

    TaiLieu.VN

    website
    support@tailieu.vn
    Location detected: 🇻🇳 Vietnamvia tld
    📧 Google Workspacevi

    Social Profiles

    FacebookTikTok

    Sponsored

    Last analyzed: 16 May 2026 at 15:18

    Historical Analysis & Change Tracking