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hocmai.vn

https://hocmai.vn· First analyzed 10 May 2026· Updated 10 May 2026
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hocmai.vn
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Mobile

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Hosting Provider

Viettel - CHT Company Ltd

IP Address

210.211.127.98

Site Location

🇻🇳 Vietnamvia tld

Server Location

🇻🇳 Hanoi, Vietnam

ASN

AS38731

Organization

Viettel - CHT Company Ltd

Server

Nginx

Nameservers

ns1.pavietnam.vn.nsbak.pavietnam.net.ns2.pavietnam.vn.

Performance

99

Core Web Vitals

Weight

First Contentful Paint
815 ms10%
Speed Index
1.1 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
15 MB
140 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Bootstrap
Infrastructure
Hosting
Viettel - CHT Company Ltd

Technology Stack

14 Technologies Detected

Analytics

5
Google Analytics
Google Analytics 4
Facebook Pixel
Hotjar
Segment

CSS Frameworks

2
Bootstrapv4.4.1
Tailwind CSS

UI Components

1
Owl Carousel

Other

1
AOS (Animate On Scroll)

Icon Libraries

1
Font Awesome

Tag Managers

1
Google Tag Manager

Advertising

1
Google Ads

Web Servers

1
Nginx

Customer Support

1
Zendesk

SEO Analysis

C66/100
19
6
1
Meta Tags14/15
Content10/12
Headings0/8
Technical16/25
E-E-A-T0/7
Images5/7
Links5/5
URL5/5
Social5/5
Freshness0/4
Mobile3/4
Indexability3/3
H
hocmai.vnhocmai.vn

Học trực tuyến - Hệ thống giáo dục HOCMAI

Dịch vụ học qua mạng với các chương trình ôn, luyện thi, thi thử đại học trực tuyến, dành cho học sinh trung học phổ thông, trung học cơ sở và tiểu học

Title Length41 chars

Recommended: 50-60 chars (~255px / 580px)

Description Length151 chars

Recommended: 120-160 chars

Issues (1)

  • • Missing H1 tag — every page should have exactly one H1

7 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

1,198 URLs

1198 sub-sitemaps

robots.txt

17 rules

Local SEO

Local Search Readiness

6/100
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

F31/100
Bot Access
20/25
Machine Read.
0/25
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
Text ratio:3%
Words:7,308
Token eff.:Excessive

Structured Data

No Schema

Citation Readiness

Opening Summary23w
Descriptive Headings
Canonical URL
Open Graph3/3
Twitter Card3/3
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.
C
69/100
11
Passed
3
Critical
2
Warnings
Images & Alt Text
18/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
12/20
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
11/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
4/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
4 recommendations
  • •Accessibility recommendation preview...
Upgrade to view recommendations

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.
20/100
F
1.90 g
CO₂e / view
15.0 MB
Page Weight
5%
Cleaner Than
New Visitor
2.18 g
vs
Returning (cached)
1.09 g
Annual (10K/mo)
228.5 kg
Emission Segments
Data Center
425 mg
Network
457 mg
Device
1.02 g
Resource Breakdown
JavaScript
305.7 KB
Images
14.5 MB
CSS
116.3 KB
Fonts
57.2 KB
HTML
88.9 KB
Other
1.9 KB
Green Hosting Not Verified
Viettel - CHT Company Ltd
8 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

21%Critical
Interactive

HTTPS

No WAF

290d

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

25.01.2026

Valid Until

24.02.2027

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.hocmai.vnhocmai.vn

SHA-256 Fingerprint

F6:C2:5A:81:C9:96:94:AC:48:9A:43:6A:75:06:75:21:7E:E7:DB:22...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-headers
*
access-control-allow-methods
GET, HEAD, OPTIONS, POST
access-control-expose-headers
Server,range,Content-Length,Content-Range
cache-control
🔴 No Cache(no-cache)
content-encoding
📦 Gzip(gzip)
content-type
text/html; charset=UTF-8
Good Warning Issue

Email Infrastructure

Google Workspace

Score

90

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (5)

aspmx.l.google.com
alt1.aspmx.l.google.com
alt2.aspmx.l.google.com
alt3.aspmx.l.google.com

+1 more

Domain Information

hocmai.vn

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Privacy policy page linked

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.
B
72/100
Mobile Friendly121 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
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Montserrat

WCAG Partial
53/100
Readability
/30
14/30

10px · LH 1.50

Hierarchy
/20
10/20
WCAG
/25
13/25

2.16:1 min contrast

Performance
/25
16/25

1 font · 6 req

Heading Font

Montserrat

Body Font

Montserrat

Sans10px

Contrast Ratio

2.16:1

20 issues

Reading Comfort

~79 CPL

Wide lines
10px
p

❌ Critical: 10px body text is too small. Minimum 14px, recommend 16px+.

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

⚠️ Wide lines: ~79 chars/line. Use max-width: 65ch for comfortable reading.

✅ Easy to read: Flesch score 83/100 — accessible to general audiences.

⚠️ Partial contrast: 20 elements below WCAG AA threshold (min 2.2:1).

❌ Pure vw font sizes: Viewport units alone break browser zoom (WCAG 1.4.4 fail). Use clamp(rem, vw, rem).

Buy on MyFontsFlesch 83

Color Palette

10 unique colors
Light
#7f7f7f
Other· 53.099999999999994%
#043d6e
Primary· 8.7%
#e8efea
Secondary· 7.8%
#5d9ed4
Accent· 7.2%
#ab5332
Accent· 4.8%
#bda17b
Secondary· 3.4%
#205171
Accent· 2.9%
#2f6581
Secondary· 2.9%

Business & Marketing Stack

6 Tools Detected

Enterprise

Behavior Analytics

3
Google Tag ManagerFree
Google AnalyticsFree
HotjarMid-Market

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

6

Total Tools

1

Enterprise

2

Mid-Market

Assessment: Sophisticated marketing and sales technology infrastructure

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Scripts & Styles

24 Resources

20
Scripts
4
Styles
17
Async
2
Defer

Top Script Sources

connect.facebook.net(9)googletagmanager.com(4)local(3)google-analytics.com(1)googleads.g.doubleclick.net(1)

Website Identity

hocmai.vn

Location detected: 🇻🇳 Vietnamvia tld
📧 Google Workspacevi

Social Profiles

FacebookTikTok

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Last analyzed: 10 May 2026 at 13:30

Historical Analysis & Change Tracking

hocmai.vn Technology Stack - Built With Owl Carousel, AOS (Animate On Scroll), Bootstrap, Tailwind CSS, Font Awesome | StackOptic | StackOptic