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jarl.org

https://jarl.org· First analyzed 12 May 2026· Updated 12 May 2026
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jarl.org
Desktop screenshot of jarl.org
Mobile screenshot of jarl.org
Mobile

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Hosting Provider

DIX Co., Ltd.

IP Address

153.123.7.42

Site Location

🇯🇵 Japanvia ip

Server Location

🇯🇵 Chiyoda City, Japan

ASN

AS131921

Organization

DIX Co., Ltd.

Server

Nginx

Nameservers

wx109.wadax-sv.jp.nswx101.wadax-sv.jp.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
606 ms10%
Speed Index
788 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
806 KB
31 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
DIX Co., Ltd.

Technology Stack

4 Technologies Detected

Libraries

1
jQueryv1.8.3

CSS Frameworks

1
Tailwind CSS

Analytics

1
Google Analytics

Web Servers

1
Nginx

SEO Analysis

F37/100
9
13
2
Meta Tags5/15
Content6/12
Headings1/8
Technical10/21
E-E-A-T0/7
Images1/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile1/4
Indexability3/3
J
jarl.orgjarl.org

一般社団法人　日本アマチュア無線連盟

一般社団法人　日本アマチュア無線連盟 | 無線 | アマチュア無線

Title Length18 chars

Recommended: 50-60 chars (~111px / 580px)

Description Length33 chars

Recommended: 120-160 chars

Issues (2)

  • • Missing H1 tag — every page should have exactly one H1
  • • Most images missing alt text (10/18) — critical for accessibility and SEO

15 issues found

Upgrade to view details

Local SEO

Local Search Readiness

3/100
Poor
1 14 2

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

F31/100
Bot Access
20/25
Machine Read.
4/25
Schema Data
0/25
Citation
7/25

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:5%
Words:103
Token eff.:Too Short
Sections/1K:38.8

Structured Data

No Schema

Citation Readiness

Opening Summary75w
Descriptive Headingsavg 1w
Canonical URL
Open Graph0/3
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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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.
B
76/100
10
Passed
4
Critical
1
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
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
6/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
1 recommendation
  • •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.
43/100
B
100 mg
CO₂e / view
805.6 KB
Page Weight
80%
Cleaner Than
New Visitor
114 mg
vs
Returning (cached)
57 mg
Annual (10K/mo)
12.0 kg
Emission Segments
Data Center
22 mg
Network
24 mg
Device
54 mg
Resource Breakdown
Images
790.4 KB
CSS
3.4 KB
HTML
3.6 KB
Other
8.3 KB
Green Hosting Not Verified
DIX Co., Ltd.
5 recommendations
  • •Carbon footprint recommendation preview...
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F

Security Score

21%Critical
Interactive

HTTPS

No WAF

159d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

GlobalSign nv-sa

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

17.09.2025

Valid Until

19.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

www.jarl.orgjarl.org

SHA-256 Fingerprint

CE:97:02:AD:12:F9:03:86:91:A6:E2:67:1C:B9:F1:66:F1:A8:D7:B2...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

content-encoding
⚡ Brotli(br)
content-type
text/html
date
Tue, 12 May 2026 13:55:48 GMT
etag
W/"69fd5340-2b9c"
last-modified
Fri, 08 May 2026 03:06:40 GMT
server
nginx
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

93

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

wxa103.wadax-sv.jp

Domain Information

jarl.org

Domain Age
30y 1m

Created

05.04.1996

Expires

06.04.2027

Last Updated

26.03.2026

Registrar

GMO Internet Group, Inc. d/b/a Onamae.com

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

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
48/100
Not Mobile Friendly1 breakpoint
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, user-scalable=yes, maximum-scale=1.0, minimum-scale=1.0
3 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

verdana

WCAG Partial
52/100
Readability
/30
16/30

12px · LH 1.50

Hierarchy
/20
5/20

1x ratio

WCAG
/25
17/25

1.7:1 min contrast

Performance
/25
14/25

1 font

Heading Font

verdana

Sans12px

Body Font

verdana

Sans12px

Contrast Ratio

1.7:1

12 issues

Reading Comfort

~56 CPL

Optimal (45–75)
12px
h1
14px
h3
12px
p
Minor Second
Scale

❌ Critical: 12px body text is too small. Minimum 14px, recommend 16px+.

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

✅ Optimal line length: ~56 chars/line (ideal 45–75 CPL).

⚠️ Partial contrast: 12 elements below WCAG AA threshold (min 1.7:1).

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

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

Buy on MyFonts

Color Palette

11 unique colors
Light
#ffffff
Background· 65.2%
#014812
Primary· 6.3%
#afcdc0
Secondary· 4.7%
#7c9397
Secondary· 4%
#189ea1
Accent· 3.7%
#ebf2f2
Secondary· 3.2%
#095c29
Accent· 2.9%
#afa297
Secondary· 2.6%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

1

Categories

1

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

6 Resources

3
Scripts
3
Styles
2
Async
0
Defer

Top Script Sources

cse.google.com(2)google.com(1)

Website Identity

jarl.org

30 years old
Location detected: 🇯🇵 Japanvia ip
GMO Internet Group, Inc. d/b/a Onamae.comja

Social Profiles

YouTube

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Last analyzed: 12 May 2026 at 13:56

Historical Analysis & Change Tracking