StackOptic
Back to Search
rikkei.edu.vn favicon

rikkei.edu.vn

https://rikkei.edu.vn· First analyzed 29 Apr 2026· Updated 29 Apr 2026
Export
rikkei.edu.vn
Desktop screenshot of rikkei.edu.vn
Mobile screenshot of rikkei.edu.vn
Mobile

Sponsored

Hosting Provider

P.A Viet Nam company limited

IP Address

103.77.162.44

Site Location

🇻🇳 Vietnamvia tld

Server Location

🇻🇳 Quận Ba, Vietnam

ASN

AS45544

Organization

P.A Viet Nam company limited

Server

LiteSpeed

Nameservers

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

Performance

92

Core Web Vitals

Weight

First Contentful Paint
1.3 s10%
Speed Index
1.7 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
10.3 MB
61 requests

Image Optimization

Lazy LoadWebP
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
WordPressv6.8.3
cms
hoabinhweb-v3-154v3.18.1Custom
by Author URI:
View Theme

Technology Stack

15 Technologies Detected

Plugins

5
Contact Form 7
Simple LightboxMl SliderGtranslate
Yoast SEO

Analytics

3
Google Analytics
Google Analytics 4
Facebook Pixel

Libraries

2
jQueryv3.7.1
Lightbox

CSS Frameworks

1
Tailwind CSS

Fonts

1
Google Fonts

Tag Managers

1
Google Tag Manager

Web Servers

1
LiteSpeed

Customer Support

1
Zendesk

SEO Analysis

C68/100
19
9
2
Meta Tags4/15
Content8/12
Headings5/8
Technical24/25
E-E-A-T2/7
Images2/7
Links5/5
URL5/5
Social3/5
Freshness4/4
Mobile3/4
Indexability3/3
R
rikkei.edu.vnrikkei.edu.vn

Trang chủ - Rikkei Education

No description available for this page.

Title Length28 chars

Recommended: 50-60 chars (~167px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

  • • Missing meta description — important for click-through rates in SERPs
  • • Most images missing alt text (130/132) — critical for accessibility and SEO

11 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

5 URLs

5 sub-sitemaps

robots.txt

3 rules

Local SEO

Local Search Readiness

15/100
Poor
4 13

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

Sponsored

AI & LLM Readiness

D53/100
Bot Access
20/25
Machine Read.
12/25
Schema Data
8/25
Citation
13/25

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.txtinvalid
llms-full.txt
Semantic HTML
Heading Hierarchy
Text ratio:2%
Words:2,148
Token eff.:Optimal

Structured Data

4 JSON-LD
Organization×1.1WebSiteBreadcrumbListSearchAction
sameAs entity links

Citation Readiness

Opening Summary9309w
Descriptive Headingsavg 3w
Canonical URL
Open Graph1/3
Twitter Card1/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (11)
AI readiness recommendation preview...
Upgrade to view recommendations

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.
A
80/100
12
Passed
2
Critical
1
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
13/20
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
15/15
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.
1 recommendation
  • •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.
28/100
F
1.31 g
CO₂e / view
10.3 MB
Page Weight
5%
Cleaner Than
New Visitor
1.49 g
vs
Returning (cached)
747 mg
Annual (10K/mo)
156.8 kg
Emission Segments
Data Center
292 mg
Network
314 mg
Device
701 mg
Resource Breakdown
JavaScript
258.7 KB
Images
650.6 KB
CSS
9.4 MB
Fonts
820 B
HTML
72.9 KB
Green Hosting Not Verified
P.A Viet Nam company limited
7 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

21%Critical
Interactive

HTTPS

No WAF

177d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

08.04.2026

Valid Until

23.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

rikkei.edu.vnwww.rikkei.edu.vn

SHA-256 Fingerprint

48:3F:87:AF:12:EC:DC:82:79:9A:F2:0E:A5:08:54:F4:F9:63:D4:78...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations
Upgrade to view header details

HTTP Headers

Developer Console

alt-svc
h3=":443"; ma=2592000, h3-29=":443"; ma=2592000, h3-Q050=":4...
content-encoding
⚡ Brotli(br)
content-type
text/html; charset=UTF-8
date
Wed, 29 Apr 2026 08:48:34 GMT
link
<https://rikkei.edu.vn/wp-json/>; rel="https://api.w.org/", ...
server
LiteSpeed
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

70

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (3)

mx3.larksuite.com
mx2.larksuite.com
mx1.larksuite.com

Domain Information

rikkei.edu.vn

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Notice (WP)

Cookie Consent Banner
Cookie Notice (WP)
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
CMP: Cookie Notice (WP)

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
76/100
Mobile Friendly38 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

Be Vietnam Pro + SF Pro DisplayR

WCAG Partial
56/100
Readability
/30
23/30

16px · LH 1.50

Hierarchy
/20
9/20

1.25x ratio

WCAG
/25
13/25

1:1 min contrast

Performance
/25
11/25

2 fonts · 9 req

Heading Font

Be Vietnam Pro

Sans20px

Body Font

SF Pro DisplayR

Sans16px

Contrast Ratio

1:1

16 issues

Reading Comfort

~40 CPL

Narrow lines
20px
h1
40px
h2
20px
h3
16px
p
Major Second
Scale

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

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

✅ Easy to read: Flesch score 77/100 — accessible to general audiences.

⚠️ Partial contrast: 16 elements below WCAG AA threshold (min 1.0:1).

⚠️ Minor heading issue: 0 level skip(s) detected. Maintain sequential order for screen readers.

⚠️ Weak hierarchy: Headlines should be ≥2x body size for clear visual structure.

GGoogle FontsBuy on MyFontsFlesch 77

Color Palette

10 unique colors
Light
#ffffff
Background· 15.600000000000001%
#0230b2
Primary· 26.3%
#07368c
Accent· 23.200000000000003%
#0545bf
Accent· 10%
#c40832
Accent· 7.8%
#5482c7
Accent· 4.3%
#0941a5
Accent· 3.2%
#3e2047
Secondary· 3%

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

2
Google Tag ManagerFree
Google AnalyticsFree

User behavior and product analytics

Advertising

1
Facebook PixelMid-Market

Ad platforms and retargeting pixels

2

Categories

3

Total Tools

0

Enterprise

1

Mid-Market

Assessment: Well-developed marketing technology stack

Sponsored

Scripts & Styles

28 Resources

20
Scripts
8
Styles
4
Async
1
Defer

Top Script Sources

rikkei.edu.vn(16)connect.facebook.net(2)googletagmanager.com(2)

Website Identity

Rikkei Academy - Để nông dân biết code

Rikkei Academy - Để nông dân biết code

Organization

Rikkei Education

rikkei.edu.vn/
Location detected: 🇻🇳 Vietnamvia tld
vi

Social Profiles

FacebookLinkedInTikTok

Sponsored

Last analyzed: 29 Apr 2026 at 08:49

Historical Analysis & Change Tracking