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elm-chan.org

https://elm-chan.org· First analyzed 05 May 2026· Updated 05 May 2026
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elm-chan.org
Desktop screenshot of elm-chan.org
Mobile screenshot of elm-chan.org
Mobile

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Hosting Provider

DIX Co., Ltd.

IP Address

153.122.205.7

Site Location

🇯🇵 Japanvia ip

Server Location

🇯🇵 Chiyoda City, Japan

ASN

AS131921

Organization

DIX Co., Ltd.

Server

Apache

Nameservers

ns.namedserver.net.ns2.namedserver.net.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
574 ms10%
Speed Index
746 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
139 KB
9 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
DIX Co., Ltd.

Technology Stack

1 Technologies Detected

Web Servers

1
Apache

SEO Analysis

D43/100
12
9
2
Meta Tags7/15
Content7/12
Headings0/8
Technical8/21
E-E-A-T0/7
Images4/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
E
elm-chan.orgelm-chan.org

ELM by ChaN

Electronics projects and related informations for electronics enthusiasts.

Title Length11 chars

Recommended: 50-60 chars (~71px / 580px)

Description Length74 chars

Recommended: 120-160 chars

Issues (2)

  • • Missing H1 tag — every page should have exactly one H1
  • • Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

11 issues found

Upgrade to view details

Local SEO

Local Search Readiness

5/100
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

F30/100
Bot Access
20/25
Machine Read.
4/25
Schema Data
0/25
Citation
6/25

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:26%
Words:183
Token eff.:Too Short

Structured Data

No Schema

Citation Readiness

Opening Summary73w
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 (10)
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...
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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.
60/100
A+
17 mg
CO₂e / view
139.4 KB
Page Weight
95%
Cleaner Than
New Visitor
20 mg
vs
Returning (cached)
10 mg
Annual (10K/mo)
2.1 kg
Emission Segments
Data Center
4 mg
Network
4 mg
Device
9 mg
Resource Breakdown
Images
1.9 KB
CSS
135.6 KB
HTML
1.9 KB
Green Hosting Not Verified
DIX Co., Ltd.
3 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
B

Security Score

71%Good
Static / Informational

HTTPS

No WAF

34d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

GlobalSign nv-sa

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

07.05.2025

Valid Until

08.06.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

www.elm-chan.orgelm-chan.org

SHA-256 Fingerprint

F5:E4:64:73:9A:E3:3E:09:39:57:09:6B:C4:08:16:AE:77:63:B6:AE...

Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges
bytes
content-encoding
📦 Gzip(gzip)
content-length
1648
content-type
text/html
date
Tue, 05 May 2026 16:04:23 GMT
etag
"fea-6509a1b68c4d3-gzip"
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

45

SPF
DKIM
DMARC

MX Records (1)

mx.elm-chan.org

Domain Information

elm-chan.org

Domain Age
25y 9m

Created

28.07.2000

Expires

28.07.2026

Last Updated

17.07.2025

Registrar

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

DNSSEC
Not Enabled

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.
F
34/100
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.
3 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

System Default + serif

WCAG Fail
57/100
Readability
/30
22/30

16px · LH 1.33

Hierarchy
/20
9/20
WCAG
/25
12/25

1:1 min contrast

Performance
/25
14/25

0 fonts

Heading Font

System Default

Body Font

serif

Serif16px

Contrast Ratio

1:1

38 issues

Reading Comfort

~52 CPL

Optimal (45–75)
16px
p

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

⚠️ Tight line spacing (1.33). Increase to 1.4–1.6 for better readability.

✅ Optimal line length: ~52 chars/line (ideal 45–75 CPL).

⚠️ Hard to read: Flesch score 40/100. Simplify sentences for wider reach.

❌ Low contrast: 38 elements fail WCAG AA (min 1.0:1). Increase text/background contrast.

✅ Lean font stack: 0 font families keeps load times fast.

Flesch 40

Color Palette

7 unique colors
Light
#99a89d
Secondary· 6.5%
#33063f
Primary· 50.5%
#16062f
Accent· 22.6%
#4c566f
Secondary· 9.6%
#161a41
Secondary· 4.3%
#491c43
Secondary· 3.8%

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

2 Resources

0
Scripts
2
Styles
0
Async
0
Defer

Top Script Sources

Website Identity

elm-chan.org

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

Social Profiles

X (Twitter)

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Last analyzed: 05 May 2026 at 16:04

Historical Analysis & Change Tracking