pdu.edu.vn

https://pdu.edu.vn· First analyzed 19 May 2026· Updated 19 May 2026

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pdu.edu.vn

Mobile

Sponsored

Hosting Provider

Vietnam Posts and Telecommunications Group

IP Address

221.132.29.9

Site Location

🇻🇳 Vietnamvia tld

Server Location

🇻🇳 Hanoi, Vietnam

ASN

AS45899

Organization

Vietnam Posts and Telecommunications Group

Server

Nginx

Nameservers

ns2.vdc3.vn.ns1.vdc3.vn.

Performance

Core Web Vitals

Weight

First Contentful Paint

2.6 s10%

Speed Index

3.4 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

1.7 MB

63 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Vietnam Posts and Telecommunications Group

Technology Stack

3 Technologies Detected

Libraries

jQueryv1.7.1

Web Servers

Nginx

Languages

PHPv5.2.17

SEO Analysis

D46/100

Meta Tags8/15

Content11/12

Headings0/8

Technical6/21

E-E-A-T3/7

Images1/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

pdu.edu.vnpdu.edu.vn

Website Truong Dai Hoc Pham Van Dong

Your slogan here

Title Length36 chars

Recommended: 50-60 chars (~224px / 580px)

Description Length16 chars

Recommended: 120-160 chars

Issues (3)

• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (93/93) — critical for accessibility and SEO
• Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

13 issues found

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Local SEO

Local Search Readiness

0/100

Poor

15 2

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

Sponsored

AI & LLM Readiness

F34/100

Bot Access

20/25

Machine Read.

8/25

Schema Data

0/25

Citation

6/25

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:18%

Words:1,865

Token eff.:Optimal

Structured Data

No Schema

Citation Readiness

Opening Summary

Descriptive Headings

Canonical URL

Open Graph0/3

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.

43/100

Passed

Critical

Warnings

Images & Alt Text

5/20

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

Semantic Structure

3/20

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

1/15

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.

26/100

221 mg

CO₂e / view

1.7 MB

Page Weight

60%

Cleaner Than

New Visitor

252 mg

Returning (cached)

126 mg

Annual (10K/mo)

26.5 kg

Emission Segments

Data Center

49 mg

Network

53 mg

Device

119 mg

Resource Breakdown

JavaScript

121.6 KB

Images

1.6 MB

CSS

37.2 KB

HTML

10.0 KB

Green Hosting Not Verified

Vietnam Posts and Telecommunications Group

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

302d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

GlobalSign nv-sa

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

13.02.2026

Valid Until

17.03.2027

OCSP Stapling

Enabled

Subject Alternative Names (2)

www.pdu.edu.vnpdu.edu.vn

SHA-256 Fingerprint

0F:45:FD:C5:52:3A:2A:C7:E0:C8:6D:E2:A7:EA:14:02:55:9C:3F:2D...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

connection

keep-alive

content-encoding

📦 Gzip(gzip)

content-length

9929

content-type

text/html

date

Tue, 19 May 2026 03:05:23 GMT

server

nginx

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

MX Records (7)

ALT2.ASPMX.L.GOOGLE.COM

ASPMX5.GOOGLEMAIL.COM

ALT1.ASPMX.L.GOOGLE.COM

ASPMX3.GOOGLEMAIL.COM

+3 more

Domain Information

pdu.edu.vn

DNSSEC

Not Enabled

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.

29/100

Not 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.

4 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

tahoma

WCAG Partial

49/100

Readability

/30

11/30

11px · LH --

Hierarchy

/20

10/20

WCAG

/25

14/25

3.1:1 min contrast

Performance

/25

14/25

1 font

Heading Font

tahoma

Body Font

tahoma

Sans11px

Contrast Ratio

3.1:1

6 issues

Reading Comfort

Single Family

left aligned

❌ Critical: 11px body text is too small. Minimum 14px, recommend 16px+.

❌ Very complex text: Flesch score 0/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 6 elements below WCAG AA threshold (min 3.1:1).

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

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

Buy on MyFontsFlesch 0

Color Palette

8 unique colors

Light

#cccccc

Other· 27%

#f3f8fb

Background· 31.3%

#77b8f2

Accent· 9.1%

#c4ddf1

Primary· 8.6%

#6785bb

Secondary· 6.6%

#b7cee6

Secondary· 5.1%

#b9bfcd

Secondary· 4.7%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

12 Resources

Scripts

Styles

Async

Defer

Top Script Sources

js(9)chromejs(1)

Website Identity

pdu.edu.vn

Location detected: 🇻🇳 Vietnamvia tld

📧 Google Workspace

Social Profiles

Facebook

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Last analyzed: 19 May 2026 at 03:06

Historical Analysis & Change Tracking