codegym.vn

https://codegym.vn· First analyzed 15 May 2026· Updated 15 May 2026

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codegym.vn

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

104.21.57.107

Site Location

🇻🇳 Hà Nội, Vietnamvia schema

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

eric.ns.cloudflare.com.kami.ns.cloudflare.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

899 ms10%

Speed Index

1.2 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

1.7 MB

88 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPressv6.9.4

cms

Diviv4.27.6Custom

by Elegant Themes

View Theme

Technology Stack

25 Technologies Detected

Plugins

Highlighting Code Block

Popups For Divi

Button Contact Vr Table Of Contents Plus Download Monitor

Course Divi Module Main

Opening Schedule Extension Main

Supreme Modules Pro For Divi

Brave Popup Builder

Divi Contact Module Pro Master

Analytics

Libraries

Other

UI Components

CSS Frameworks

Icon Libraries

Fonts

Tag Managers

Advertising

CDN

Languages

Security

SEO Analysis

B76/100

Meta Tags14/15

Content3/12

Headings8/8

Technical24/25

E-E-A-T2/7

Images3/7

Links5/5

URL5/5

Social4/5

Freshness2/4

Mobile3/4

Indexability3/3

codegym.vncodegym.vn

CodeGym: AI-Native Bootcamp - Học lập trình

CodeGym là Hệ thống đào tạo lập trình hiện đại dành cho mọi đối tượng với mục tiêu nâng tầm phát triển ngành phần mềm Việt Nam.

Title Length43 chars

Recommended: 50-60 chars (~266px / 580px)

Description Length127 chars

Recommended: 120-160 chars

Issues (2)

• Very thin content (7 words). Search engines need substantial content for ranking.
• Most images missing alt text (60/108) — critical for accessibility and SEO

4 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

9 URLs

9 sub-sitemaps

robots.txt

25 rules

Sitemap reference found

Local SEO

Local Search Readiness

53/100

Fair

14 9

Sponsored

AI & LLM Readiness

F28/100

Bot Access

15/25

Machine Read.

1/25

Schema Data

10/25

Citation

2/25

AI Bot Access

6/14 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:3,528

Token eff.:Poor Structure

Structured Data

8 JSON-LD

Organization×1.1WebSiteLocalBusiness×1.1BreadcrumbListSearchAction

sameAs entity links

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 (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.

68/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

6/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

15/15

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

11/15

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.

2 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.

66/100

178 mg

CO₂e / view

1.7 MB

Page Weight

60%

Cleaner Than

New Visitor

204 mg

Returning (cached)

102 mg

Annual (10K/mo)

21.4 kg

Emission Segments

Data Center

9 mg

Network

52 mg

Device

117 mg

Resource Breakdown

JavaScript

315.2 KB

Images

574.7 KB

CSS

745.0 KB

Fonts

38.1 KB

HTML

91.5 KB

Green Hosting Verified

Cloudflare

Provider Match

3 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

41%Poor

Interactive

HTTPS

WAF

82d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

08.05.2026

Valid Until

06.08.2026

OCSP Stapling

Enabled

Subject Alternative Names (3)

codegym.vnlearn-docs.codegym.vn*.learn-docs.codegym.vn

SHA-256 Fingerprint

86:9B:B0:CF:74:21:45:FF:FC:BF:D4:ED:80:D8:6D:E0:CA:22:30:87...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400

cache-control

🟡 0s(max-age=0)

cf-cache-status

DYNAMIC

cf-ray🇩🇪 Frankfurt

9fc5cb6d9ae5cb3f-FRA

content-encoding

zstd

content-type

text/html; charset=UTF-8

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (5)

aspmx.l.google.com

alt3.aspmx.l.google.com

alt4.aspmx.l.google.com

alt1.aspmx.l.google.com

+1 more

Domain Information

codegym.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.

55/100

Not Mobile Friendly110 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.

3 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Helvetica

WCAG Partial

72/100

Readability

/30

21/30

16px · LH 1.70

Hierarchy

/20

17/20

3.62x ratio · ✓ H1→H6

WCAG

/25

16/25

1:1 min contrast

Performance

/25

18/25

2 fonts · 5 req

Heading Font

Helvetica

Sans58px

Body Font

Helvetica

Sans16px

Contrast Ratio

1:1

8 issues

Reading Comfort

~42 CPL

Narrow lines

58px

42px

22px

18px

16px

✅ Excellent readability: 16px body text is ideal for all devices.

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

⚠️ Partial contrast: 8 elements below WCAG AA threshold (min 1.0:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 3.6x larger than body text.

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

GGoogle Fonts Buy on MyFontsFlesch 83

Color Palette

7 unique colors

Light

#eae7e8

Other· 3.2%

#f9fafc

Primary· 76.1%

#272882

Accent· 10.1%

#5e5397

Secondary· 4%

#c7b8b9

Secondary· 3.4%

#c28764

Secondary· 3.1%

#8a1d4e

Accent· 0.2%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

21 Resources

Scripts

Styles

Async

Defer

Top Script Sources

codegym.vn(20)

Website Identity

CodeGym - Hệ thống đào tạo lập trình hiện đại

Organization

CodeGym là Hệ thống đào tạo lập trình hiện đại dành cho mọi đối tượng với mục tiêu nâng tầm phát triển ngành phần mềm Việt Nam.

info@codegym.vn

0989534458

codegym.vn/

Số 23, Lô TT01, KĐT Mon City, Mỹ Đình 2, Q. Nam Từ Liêm, Hà Nội

12014, Hà Nội

Location detected: 🇻🇳 Vietnam, Hà Nộivia schema

📧 Google Workspacevi

Social Profiles

Facebook LinkedIn TikTok

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Last analyzed: 15 May 2026 at 23:07

Historical Analysis & Change Tracking