ou.edu.vn

https://ou.edu.vn· First analyzed 20 May 2026· Updated 20 May 2026

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ou.edu.vn

Mobile

Sponsored

Hosting Provider

VIETEL

IP Address

171.244.23.58

Site Location

🇻🇳 Vietnamvia tld

Server Location

🇻🇳 Hanoi, Vietnam

ASN

AS7552

Organization

VIETEL

Server

Microsoft IIS

Nameservers

ns2.ou.edu.vn.ns1.ou.edu.vn.

Performance

Core Web Vitals

Weight

First Contentful Paint

3.8 s10%

Speed Index

5.0 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

20.6 MB

122 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPressv5.5.3

cms

educationv5.5.5Custom

by Vietsmiler

View Theme

Technology Stack

19 Technologies Detected

Plugins

Contact Form 7

Ajax Search Lite Js_Composer_Salient Masterslider

Analytics

Libraries

UI Components

Other

CSS Frameworks

Icon Libraries

Fonts

Web Servers

Languages

Frameworks

Customer Support

Security

SEO Analysis

D56/100

Meta Tags4/15

Content11/12

Headings3/8

Technical18/25

E-E-A-T0/7

Images4/7

Links5/5

URL5/5

Social2/5

Freshness0/4

Mobile1/4

Indexability3/3

ou.edu.vnou.edu.vn

TRƯỜNG ĐẠI HỌC MỞ TP HCM

No description available for this page.

Title Length24 chars

Recommended: 50-60 chars (~155px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

• Missing meta description — important for click-through rates in SERPs
• Missing H1 tag — every page should have exactly one H1

12 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

31 URLs

31 sub-sitemaps

robots.txt

4 rules

Sitemap reference found

Local SEO

Local Search Readiness

5/100

Poor

2 13 2

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

Sponsored

AI & LLM Readiness

F35/100

Bot Access

20/25

Machine Read.

4/25

Schema Data

0/25

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

nav

Text ratio:8%

Words:3,424

Token eff.:Poor Structure

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary1228w

Descriptive Headingsavg 9w

Canonical URL

Open Graph1/3

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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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.

71/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

11/20

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

9/15

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

ARIA & Roles

7/15

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.

21/100

2.61 g

CO₂e / view

20.6 MB

Page Weight

Cleaner Than

New Visitor

2.98 g

Returning (cached)

1.49 g

Annual (10K/mo)

313.3 kg

Emission Segments

Data Center

583 mg

Network

627 mg

Device

1.40 g

Resource Breakdown

JavaScript

632.9 KB

Images

19.6 MB

CSS

360.5 KB

Fonts

1.8 KB

HTML

44.0 KB

Green Hosting Not Verified

VIETEL

8 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

68d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

28.04.2026

Valid Until

27.07.2026

Subject Alternative Names (20)

arclms.ou.edu.vnbcck.ou.edu.vnbcmhapi.ou.edu.vncvht.ou.edu.vndevlms.ou.edu.vnfsis.ou.edu.vngslms.ou.edu.vnhoso.ou.edu.vn+12 more

SHA-256 Fingerprint

E3:D0:32:F5:9D:D7:CE:32:55:A6:FA:8E:9D:4F:F6:8B:15:3A:81:1D...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-methods

POST,GET,OPTIONS,PUT,DELETE

access-control-allow-origin

access-control-expose-headers

Content-Type, Accept, expiry, uid, access-token, token-type

content-encoding

📦 Gzip(gzip)

content-length

44805

content-type

text/html; charset=UTF-8

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (5)

alt2.aspmx.l.google.com

alt3.aspmx.l.google.com

alt4.aspmx.l.google.com

alt1.aspmx.l.google.com

+1 more

Domain Information

ou.edu.vn

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

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.

69/100

Mobile Friendly6 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=0

2 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Arial

WCAG Partial

52/100

Readability

/30

18/30

14px · LH 1.57

Hierarchy

/20

5/20

WCAG

/25

12/25

2.03:1 min contrast

Performance

/25

17/25

System fonts

Heading Font

Arial

Sans

Body Font

Arial

Sans14px

Contrast Ratio

2.03:1

25 issues

Reading Comfort

~35 CPL

Narrow lines

30px

18px

21px

14px

⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

✅ Optimal line spacing: 1.57 ratio (ideal range 1.4–1.6).

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

⚠️ Partial contrast: 25 elements below WCAG AA threshold (min 2.0:1).

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

⚠️ Text justify detected: Justified text creates uneven word spacing, hurting readability on web.

GGoogle FontsFlesch 100

Color Palette

7 unique colors

Light

#ffffff

Background· 64.2%

#1d559f

Primary· 17.7%

#85aab3

Secondary· 5.2%

#57708a

Secondary· 3.9%

#f7dbae

Accent· 3.6%

#dbd7c9

Secondary· 3.2%

#214880

Accent· 1.9%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

ou.edu.vn(17)google-analytics.com(1)googletagmanager.com(1)apis.google.com(1)

Website Identity

ou.edu.vn

Location detected: 🇻🇳 Vietnamvia tld

📧 Google Workspaceen-US

Social Profiles

Facebook TikTok

Sponsored

Last analyzed: 20 May 2026 at 02:18

Historical Analysis & Change Tracking