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jretc.net

https://jretc.net· First analyzed 17 May 2026· Updated 17 May 2026
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jretc.net
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Hosting Provider

Amazon Web Services (AWS)
aws.amazon.com

IP Address

54.183.102.22

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 San Jose, United States

ASN

AS16509

Organization

AWS EC2 (us-west-1)

Server

OpenResty

Nameservers

ns44.domaincontrol.com.ns43.domaincontrol.com.

Performance

84

Core Web Vitals

Weight

First Contentful Paint
1.9 s10%
Speed Index
2.5 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
298 KB
150 requests

Image Optimization

Lazy Load
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Strikingly

Technology Stack

8 Technologies Detected

Analytics

2
Google Analytics
Segment

Libraries

1
jQueryv3.7.1

Other

1
lazysizes

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

Web Servers

1
OpenResty

Security

1
reCAPTCHA

SEO Analysis

C61/100
20
4
2
Meta Tags9/15
Content3/12
Headings8/8
Technical20/25
E-E-A-T0/7
Images1/7
Links5/5
URL5/5
Social5/5
Freshness0/4
Mobile2/4
Indexability3/3
J
jretc.netjretc.net

補習班管理系統推薦|傑人校掌雲補習班管理系統

傑人團隊深耕補教產業二十多年，深知成功的關鍵在於——把時間留給教學，而非行政。 我們打造【校掌雲補習班管理系統】，協助補習班自動化流程、標準化管理，讓主任與老師專注於教育與服務。 我們相信，當教學品質提升、信任加深、環境更友善，補習班才能邁向永續與成長。

Title Length22 chars

Recommended: 50-60 chars (~134px / 580px)

Description Length127 chars

Recommended: 120-160 chars

Issues (2)

  • • Very thin content (1 words). Search engines need substantial content for ranking.
  • • Most images missing alt text (20/21) — critical for accessibility and SEO

6 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

173 URLs

robots.txt

5 rules

Sitemap reference found

Local SEO

Local Search Readiness

10/100
Poor
3 13 1

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

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AI & LLM Readiness

F23/100
Bot Access
20/25
Machine Read.
1/25
Schema Data
0/25
Citation
2/25

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:0%
Words:113
Token eff.:Too Short

Structured Data

1 JSON-LD

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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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
66/100
8
Passed
4
Critical
0
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
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.
2 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.
71/100
A+
30 mg
CO₂e / view
298.5 KB
Page Weight
90%
Cleaner Than
New Visitor
34 mg
vs
Returning (cached)
17 mg
Annual (10K/mo)
3.6 kg
Emission Segments
Data Center
2 mg
Network
9 mg
Device
20 mg
Resource Breakdown
JavaScript
27.1 KB
CSS
159.7 KB
HTML
105.5 KB
Other
6.1 KB
Green Hosting Verified
Amazon Web Services (AWS)
Provider Match
3 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

21%Critical
Interactive

HTTPS

No WAF

34d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

23.03.2026

Valid Until

21.06.2026

Subject Alternative Names (1)

www.jretc.net

SHA-256 Fingerprint

E9:AF:21:30:83:B2:50:9D:1D:2C:69:C0:97:60:F2:0C:DF:18:EF:F6...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

content-encoding
📦 Gzip(gzip)
content-type
text/html; charset=utf-8
date
Sun, 17 May 2026 08:13:31 GMT
server
openresty
strikingly-cache
current
strikingly-cache-region
us-east-1
Good Warning Issue

Email Infrastructure

GoDaddy Email

Score

20

SPF
DKIM
DMARC

MX Records (2)

smtp.secureserver.net
mailstore1.secureserver.net

Domain Information

jretc.net

Domain Age
14y 11m

Created

01.06.2011

Expires

01.06.2027

Last Updated

01.06.2025

Registrar

GoDaddy.com, LLC

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
Data Protection Officer mentioned

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.
D
51/100
Not Mobile Friendly17 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.
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Lisong Pro

WCAG Partial
69/100
Readability
/30
22/30

17px · LH 1.45

Hierarchy
/20
17/20

2.82x ratio · ✓ H1→H6

WCAG
/25
18/25

2.89:1 min contrast

Performance
/25
12/25

3 fonts · 6 req

Heading Font

Lisong Pro

Sans48px

Body Font

Lisong Pro

Sans17px

Contrast Ratio

2.89:1

1 issue

Reading Comfort

~33 CPL

Narrow lines
48px
h1
28px
h2
18px
h3
17px
p

✅ Excellent readability: 17px body text is ideal for all devices.

✅ Optimal line spacing: 1.45 ratio (ideal range 1.4–1.6).

⚠️ Partial contrast: 1 elements below WCAG AA threshold (min 2.9:1).

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

✅ Strong hierarchy: Headlines are 2.8x larger than body text.

✅ Smart font loading: font-display: swap prevents invisible text during load (FOIT).

Buy on MyFonts

Color Palette

14 unique colors
9.55:1 AAA Light
#ffffff
Primary· 23.099999999999998%
#4b4349
Other· 6.4%
#450e23
Accent· 8.7%
#212a3d
Secondary· 7%
#91594f
Secondary· 7%
#937a6f
Secondary· 5.6%
#ac9b91
Secondary· 5.5%
#19121e
Secondary· 5.2%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

Social Media

1
Facebook SDKFree

Social widgets and sharing tools

2

Categories

2

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

8 Resources

5
Scripts
3
Styles
2
Async
1
Defer

Top Script Sources

static-assets.strikinglycdn.com(3)google-analytics.com(1)cdnjs.cloudflare.com(1)

Website Identity

補習班管理系統推薦|傑人校掌雲補習班管理系統

website
14 years old
Location detected: 🇺🇸 United Statesvia ip
GoDaddy.com, LLC📧 GoDaddy Emailzh-TW

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Last analyzed: 17 May 2026 at 08:13

Historical Analysis & Change Tracking