tuyensinh247.com

https://tuyensinh247.com· First analyzed 28 May 2026· Updated 28 May 2026

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tuyensinh247.com

Mobile

Sponsored

Hosting Provider

Viettel - CHT Company Ltd

IP Address

210.211.101.211

Site Location

🇻🇳 ha noi, Vietnamvia geo_meta

Server Location

🇻🇳 Hanoi, Vietnam

ASN

AS38731

Organization

Viettel - CHT Company Ltd

Server

Nginx

CDN

Cloudflare

WAF

Cloudflare

Nameservers

giancarlo.ns.cloudflare.com.amber.ns.cloudflare.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.1 s10%

Speed Index

1.4 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

2.3 MB

174 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Viettel - CHT Company Ltd

CDN

Cloudflare

Progressive Web App

Web ManifestTheme Color

Technology Stack

13 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Facebook Pixel Microsoft Clarity

Libraries

jQueryv1.7.2

jQuery UI

Icon Libraries

Font Awesome Material Icons

CSS Frameworks

Fonts

Tag Managers

Advertising

Web Servers

SEO Analysis

C61/100

Meta Tags11/15

Content11/12

Headings1/8

Technical19/25

E-E-A-T0/7

Images2/7

Links5/5

URL5/5

Social3/5

Freshness0/4

Mobile1/4

Indexability3/3

tuyensinh247.comtuyensinh247.com

Tuyensinh247.com - Học trực tuyến cùng Thầy cô giáo giỏi, nổi tiếng

Khoá học online cho tất cả các lớp THPT, THCS, Tiểu học, luyện thi đại học, tốt nghiệp THPT, Đánh giá năng lực, Đánh giá tư duy, ôn thi vào lớp 10, vào 6 hiệ...

Description truncated.

Title Length67 chars

Recommended: 50-60 chars (~400px / 580px)

Description Length174 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (229/259) — critical for accessibility and SEO

10 issues found

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Crawlability

Sitemap

Type: index

7 URLs

7 sub-sitemaps

robots.txt

1026 rules

Sitemap reference found

Local SEO

Local Search Readiness

22/100

Needs Work

6 13 2

Sponsored

AI & LLM Readiness

F33/100

Bot Access

20/25

Machine Read.

0/25

Schema Data

0/25

Citation

13/25

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:6%

Words:7,181

Token eff.:Excessive

Sections/1K:1.5

Structured Data

No Schema

Citation Readiness

Opening Summary13w

Descriptive Headingsavg 7.2w

Canonical URL

Open Graph3/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (12)

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.

48/100

Passed

Critical

Warnings

Images & Alt Text

5/20

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

Semantic Structure

7/20

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

9/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

2/15

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

5 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.

15/100

296 mg

CO₂e / view

2.3 MB

Page Weight

30%

Cleaner Than

New Visitor

338 mg

Returning (cached)

169 mg

Annual (10K/mo)

35.5 kg

Emission Segments

Data Center

66 mg

Network

71 mg

Device

159 mg

Resource Breakdown

JavaScript

307.8 KB

Images

1.4 MB

CSS

612.2 KB

Fonts

641 B

HTML

44.8 KB

Other

9.5 KB

Green Hosting Not Verified

Viettel - CHT Company Ltd

7 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

185d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

GlobalSign nv-sa

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

29.10.2025

Valid Until

30.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.tuyensinh247.comtuyensinh247.com

SHA-256 Fingerprint

03:91:50:47:63:91:5D:8C:3C:BA:72:92:81:4F:BA:00:28:BA:F9:A1...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-store, no-cache, must-revalidate, post-check=0, pre-check...)

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=UTF-8

date

Thu, 28 May 2026 12:11:25 GMT

expires

Thu, 19 Nov 1981 08:52:00 GMT

pragma

no-cache

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (5)

alt2.aspmx.l.google.com

aspmx3.googlemail.com

aspmx.l.google.com

aspmx2.googlemail.com

+1 more

Domain Information

tuyensinh247.com

Domain Age

14y 10m

Created

15.07.2011

Expires

15.07.2031

Last Updated

18.07.2025

Registrar

GoDaddy.com, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

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.

55/100

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=1.0, maximum-scale=1.0, user-scalable=0

3 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Roboto-regular

WCAG Partial

54/100

Readability

/30

17/30

12px · LH 1.50

Hierarchy

/20

8/20

WCAG

/25

16/25

1:1 min contrast

Performance

/25

13/25

1 font · 2 req

Heading Font

Roboto-regular

Sans

Body Font

Roboto-regular

Sans12px

Contrast Ratio

1:1

11 issues

Reading Comfort

~40 CPL

Narrow lines

18px

12px

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

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

✅ Easy to read: Flesch score 94/100 — accessible to general audiences.

⚠️ Partial contrast: 11 elements below WCAG AA threshold (min 1.0:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

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

GGoogle Fonts Buy on MyFontsFlesch 94

Color Palette

10 unique colors

Light

#ffffff

Background· 47.7%

#eeeee9

Secondary· 8.7%

#317efb

Primary· 0%

#9f9284

Secondary· 8.5%

#4292b1

Secondary· 6%

#fdda13

Accent· 5.8%

#225695

Accent· 4.9%

#f7c128

Accent· 4.4%

Business & Marketing Stack

6 Tools Detected

Enterprise

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

Microsoft ClarityFree

User behavior and product analytics

Advertising

Google AdsEnterprise

Facebook PixelMid-Market

Ad platforms and retargeting pixels

Social Media

Facebook SDKFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(6)googletagmanager.com(3)connect.facebook.net(3)clarity.ms(2)widget.subiz.net(1)

Website Identity

tuyensinh247.com

18006947

14 years old

Location detected: 🇻🇳 Vietnam, ha noivia geo_meta

GoDaddy.com, LLC📧 Google Workspacevi

Social Profiles

Facebook YouTube

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Last analyzed: 28 May 2026 at 12:12

Historical Analysis & Change Tracking