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ngoaingu123.info

https://ngoaingu123.info· First analyzed 28 May 2026· Updated 28 May 2026
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ngoaingu123.info
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Mobile

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Hosting Provider

Viet Nam Data Online Joint Stock Company

IP Address

103.127.206.58

Site Location

🇻🇳 Vietnamvia ip

Server Location

🇻🇳 Phu Do, Vietnam

ASN

AS135961

Organization

Viet Nam Data Online Joint Stock Company

Server

Nginx

Nameservers

ns3.vinahost.vn.ns4.vinahost.vn.

Performance

75

Core Web Vitals

Weight

First Contentful Paint
3.1 s10%
Speed Index
4.1 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
440 KB
73 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Blogger

Technology Stack

8 Technologies Detected

Analytics

3
Google Analytics
Facebook PixelSegment

Advertising

2
Google AdsGoogle AdSense

Libraries

1
jQueryv1.11.0

CSS Frameworks

1
Tailwind CSS

Web Servers

1
Nginxv1.23.1

SEO Analysis

D59/100
16
9
1
Meta Tags7/15
Content11/12
Headings5/8
Technical18/25
E-E-A-T0/7
Images1/7
Links5/5
URL5/5
Social3/5
Freshness0/4
Mobile1/4
Indexability3/3
N
ngoaingu123.infongoaingu123.info

Tủ Sách Học Ngoại Ngữ

Sách Việt là nơi giới thiệu nguồn tài liệu số hiện đang lưu trữ tại thư viện số của các tỉnh thành & các trường đại học cao đẳng trên toàn quốc, việc cho phé...

Description truncated.
Title Length21 chars

Recommended: 50-60 chars (~128px / 580px)

Description Length274 chars

Recommended: 120-160 chars

Issues (1)

  • • Most images missing alt text (10/19) — critical for accessibility and SEO

10 issues found

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Crawlability

Sitemap
robots.txt

8 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.

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AI & LLM Readiness

D47/100
Bot Access
20/25
Machine Read.
10/25
Schema Data
3/25
Citation
14/25

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
blockquotesdef. listsnavheader/footer
Text ratio:7%
Words:1,160
Token eff.:Optimal
Sections/1K:26.7
Depth:4/5

Structured Data

1 JSON-LD
WebSiteSearchAction

Citation Readiness

Opening Summary24w
Descriptive Headingsavg 3.6w
Canonical URL
Open Graph3/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (11)
AI readiness recommendation preview...
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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.
D
54/100
9
Passed
5
Critical
4
Warnings
Images & Alt Text
5/20
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
5/15
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
6/15
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.
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.
48/100
A
54 mg
CO₂e / view
439.9 KB
Page Weight
90%
Cleaner Than
New Visitor
62 mg
vs
Returning (cached)
31 mg
Annual (10K/mo)
6.5 kg
Emission Segments
Data Center
12 mg
Network
13 mg
Device
29 mg
Resource Breakdown
JavaScript
394.0 KB
Images
300 B
HTML
15.0 KB
Other
30.7 KB
Green Hosting Not Verified
Viet Nam Data Online Joint Stock Company
4 recommendations
  • •Carbon footprint recommendation preview...
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F

Security Score

0%Critical
Critical / Transactional

HTTPS

No WAF

161d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

05.11.2025

Valid Until

05.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

ngoaingu123.infowww.ngoaingu123.info

SHA-256 Fingerprint

DA:F4:F3:C3:D0:87:24:91:AE:ED:C4:9D:34:8D:4C:FB:14:96:42:B0...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control
🟡 0s(private, max-age=0)
content-encoding
📦 Gzip(gzip)
content-length
15065
content-type
text/html; charset=UTF-8
date
Thu, 28 May 2026 13:10:18 GMT
expires
Thu, 19 Nov 1981 08:52:00 GMT
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

45

SPF
DKIM
DMARC

MX Records (1)

ngoaingu123.info

Domain Information

ngoaingu123.info

DNSSEC
Not Enabled

Privacy & Compliance

Quantcast Choice

Cookie Consent Banner
Quantcast Choice
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
CMP: Quantcast Choice
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.
D
56/100
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
3 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Trebuchet MS

WCAG Partial
58/100
Readability
/30
15/30

12px · LH 1.28

Hierarchy
/20
11/20

2x ratio

WCAG
/25
18/25

2.89:1 min contrast

Performance
/25
14/25

1 font

Heading Font

Trebuchet MS

Sans24px

Body Font

Trebuchet MS

Sans12px

Contrast Ratio

2.89:1

2 issues

Reading Comfort

~64 CPL

Optimal (45–75)
24px
h1
16px
h3
11px
h4
12px
p

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

⚠️ Tight line spacing (1.28). Increase to 1.4–1.6 for better readability.

✅ Optimal line length: ~64 chars/line (ideal 45–75 CPL).

⚠️ Partial contrast: 2 elements below WCAG AA threshold (min 2.9:1).

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

✅ Strong hierarchy: Headlines are 2.0x larger than body text.

Buy on MyFontsFlesch 68

Color Palette

7 unique colors
Light
#fcfcfe
Background· 65.3%
#176093
Primary· 8.9%
#dff2dc
Secondary· 8.4%
#d9dad2
Secondary· 5.3%
#85a1b0
Secondary· 4.5%
#204b69
Accent· 4.1%

Business & Marketing Stack

4 Tools Detected

Enterprise

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

Advertising

2
Google AdsEnterprise
Facebook PixelMid-Market

Ad platforms and retargeting pixels

Social Media

1
Facebook SDKFree

Social widgets and sharing tools

3

Categories

4

Total Tools

1

Enterprise

1

Mid-Market

Assessment: Sophisticated marketing and sales technology infrastructure

Ad Networks

Google AdSense

Sponsored

Scripts & Styles

27 Resources

20
Scripts
7
Styles
10
Async
0
Defer

Top Script Sources

messenger.svc.chative.io(6)fundingchoicesmessages.google.com(4)cse.google.com(2)connect.facebook.net(2)js(2)

Website Identity

ngoaingu123.info

Location detected: 🇻🇳 Vietnamvia ip
en-US

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Last analyzed: 28 May 2026 at 13:22

Historical Analysis & Change Tracking