kienthuc.net.vn

https://kienthuc.net.vn· First analyzed 05 May 2026· Updated 05 May 2026

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kienthuc.net.vn

Mobile

Sponsored

Hosting Provider

Vietnam Internet Network Information Center

IP Address

42.112.59.46

Site Location

🇻🇳 Vietnamvia tld

Server Location

🇻🇳 Hanoi, Vietnam

ASN

AS18403

CDN

Cloudflare

WAF

Cloudflare

Nameservers

elmo.ns.cloudflare.com.gracie.ns.cloudflare.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.9 s10%

Speed Index

2.4 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

661 KB

86 requests

Image Optimization

Lazy LoadAVIFResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Vietnam Internet Network Information Center

CDN

Cloudflare

Technology Stack

12 Technologies Detected

Advertising

Google Ads Google AdSense Criteo Outbrain

Analytics

UI Components

CSS Frameworks

Icon Libraries

Fonts

Payments

SEO Analysis

A82/100

Meta Tags7/15

Content10/12

Headings6/8

Technical24/25

E-E-A-T7/7

Images7/7

Links5/5

URL5/5

Social5/5

Freshness0/4

Mobile3/4

Indexability3/3

kienthuc.net.vnkienthuc.net.vn

Báo Tri thức và Cuộc sống - TIN TỨC PHỔ BIẾN KIẾN THỨ...

Báo Tri thức và Cuộc sống - TIN TỨC PHỔ BIẾN KIẾN THỨC 24H - Liên hiệp các Hội Khoa học Kỹ thuật Việt Nam - Thông tin sức khỏe, đẹp, giải trí, ...

Title truncated. Description truncated.

Title Length72 chars

Recommended: 50-60 chars (~437px / 580px)

Description Length225 chars

Recommended: 120-160 chars

Issues (1)

• Title is too long (72 chars, ~437px). Will be truncated in search results.

5 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

199 URLs

199 sub-sitemaps

robots.txt

13 rules

Sitemap reference found

Local SEO

Local Search Readiness

17/100

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

D57/100

Bot Access

20/25

Machine Read.

9/25

Schema Data

10/25

Citation

18/25

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.txtinvalid

llms-full.txt

Semantic HTML

Heading Hierarchy

Text ratio:10%

Words:11,141

Token eff.:Excessive

Sections/1K:1.4

Structured Data

3 JSON-LD

Person×1.3Organization×1.1WebSiteSearchAction

sameAs entity links

Citation Readiness

Opening Summary36w

Descriptive Headingsavg 11.9w

Canonical URL

Open Graph3/3

Twitter Card3/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (8)

AI readiness recommendation preview...

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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.

76/100

Passed

Critical

Warnings

Images & Alt Text

15/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

16/20

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

9/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

3 recommendations

•Accessibility recommendation preview...

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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.

55/100

82 mg

CO₂e / view

660.9 KB

Page Weight

80%

Cleaner Than

New Visitor

93 mg

Returning (cached)

47 mg

Annual (10K/mo)

9.8 kg

Emission Segments

Data Center

18 mg

Network

20 mg

Device

44 mg

Resource Breakdown

JavaScript

593.5 KB

Images

342 B

Fonts

6.2 KB

HTML

37.6 KB

Other

23.2 KB

Green Hosting Not Verified

Vietnam Internet Network Information Center

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

0%Critical

Critical / Transactional

HTTPS

No WAF

132d

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+H3

Valid From

14.09.2025

Valid Until

14.09.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.kienthuc.net.vnkienthuc.net.vn

SHA-256 Fingerprint

91:5E:92:A9:34:82:64:84:F3:BA:9C:10:C2:FA:66:B2:0E:02:93:31...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400

content-encoding

📦 Gzip(gzip)

content-type

text/html;charset=utf-8

date

Tue, 05 May 2026 09:14:58 GMT

etag

b8cc96f8ca73e22e79e75480ef7e0e13

server-time

1777972289

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

kienthuc-net-vn.mail.protection.outlook.com

Domain Information

kienthuc.net.vn

DNSSEC

Not Enabled

Privacy & Compliance

Quantcast Choice

Cookie Consent Banner

Quantcast Choice

GDPR Indicators

Cookie consent banner detected

CMP: Quantcast Choice

Data Protection Officer mentioned

Legitimate interest basis 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.

75/100

Mobile Friendly11 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

1 recommendation

•Mobile compatibility recommendation preview...

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Typography & Readability

Open Sans

WCAG Partial

58/100

Readability

/30

14/30

12px · LH 1.33

Hierarchy

/20

15/20

1.46x ratio · ✓ H1→H6

WCAG

/25

15/25

2.7:1 min contrast

Performance

/25

14/25

System fonts

Heading Font

Open Sans

Sans18px

Body Font

Open Sans

Sans12px

Contrast Ratio

2.7:1

3 issues

Reading Comfort

~50 CPL

Optimal (45–75)

18px

21px

16px

12px

Minor Second

Scale

❌ Critical: 12px body text is too small. Minimum 14px, recommend 16px+.

⚠️ Tight line spacing (1.33). Increase to 1.4–1.6 for better readability.

✅ Optimal line length: ~50 chars/line (ideal 45–75 CPL).

⚠️ Partial contrast: 3 elements below WCAG AA threshold (min 2.7:1).

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

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

GGoogle Fonts

Color Palette

7 unique colors

5.74:1 AA Dark

#666666

Other· 60.900000000000006%

#ffffff

Background· 19.3%

#1b141b

Primary· 5.1%

#828e9c

Secondary· 1.1%

Business & Marketing Stack

3 Tools Detected

Enterprise

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Advertising

Google AdsEnterprise

Ad platforms and retargeting pixels

Social Media

Facebook SDKFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

23 Resources

Scripts

Styles

Async

Defer

Top Script Sources

cpt.geniee.jp(4)pagead2.googlesyndication.com(2)googletagmanager.com(2)securepubads.g.doubleclick.net(2)fundingchoicesmessages.google.com(2)

Website Identity

Báo Tri thức và Cuộc sống - TIN TỨC PHỔ BIẾN KIẾN THỨC 24H

Organization

Location detected: 🇻🇳 Vietnamvia tld

📧 Microsoft 365viEst. 1951

Social Profiles

Facebook

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Last analyzed: 05 May 2026 at 09:15

Historical Analysis & Change Tracking