publickey1.jp

https://publickey1.jp· First analyzed 07 May 2026· Updated 07 May 2026

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publickey1.jp

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

104.21.64.18

Site Location

🇯🇵 Japanvia tld

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

dayana.ns.cloudflare.com.zeus.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

349 ms10%

Speed Index

454 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

305 KB

43 requests

Image Optimization

Responsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Cloudflare

CDN

Cloudflare

Technology Stack

4 Technologies Detected

Analytics

Advertising

CDN

SEO Analysis

D48/100

Meta Tags11/15

Content9/12

Headings1/8

Technical10/25

E-E-A-T0/7

Images1/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile3/4

Indexability3/3

publickey1.jppublickey1.jp

Publickey － Enterprise IT × Cloud Computing × Web Technology / Blog

Enterprise ITに軸足を置き、新たにIT業界を変えつつあるクラウドコンピューティングやHTML5など最新の話題を、ブロガー独自の分析を交え、充実した記事で紹介するブログです。毎日更新しています。

Title Length67 chars

Recommended: 50-60 chars (~403px / 580px)

Description Length102 chars

Recommended: 120-160 chars

Issues (3)

• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (20/23) — critical for accessibility and SEO
• Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

12 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

7,817 URLs

robots.txt

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.

Sponsored

AI & LLM Readiness

F33/100

Bot Access

20/25

Machine Read.

7/25

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:7%

Words:425

Token eff.:Optimal

Structured Data

No Schema

Citation Readiness

Opening Summary223w

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.

57/100

Passed

Critical

Warnings

Images & Alt Text

5/20

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

Semantic Structure

7/20

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

4/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

3 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.

64/100

A+

31 mg

CO₂e / view

305.3 KB

Page Weight

90%

Cleaner Than

New Visitor

35 mg

Returning (cached)

18 mg

Annual (10K/mo)

3.7 kg

Emission Segments

Data Center

2 mg

Network

9 mg

Device

20 mg

Resource Breakdown

JavaScript

225.0 KB

HTML

14.0 KB

Other

66.3 KB

Green Hosting Verified

Cloudflare

GWF Verified

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

71%Good

Static / Informational

HTTPS

WAF

73d

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

21.04.2026

Valid Until

20.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

publickey1.jp*.publickey1.jp

SHA-256 Fingerprint

97:57:13:6C:80:9D:E9:37:31:91:C4:14:75:B6:2B:66:97:80:0C:51...

Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400

cf-cache-status

DYNAMIC

cf-ray🇩🇪 Frankfurt

9f7fe1668e19d9d2-FRA

content-encoding

zstd

content-type

text/html

date

Thu, 07 May 2026 11:28:19 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

_dc-mx.55a63f4f23ed.publickey1.jp

Domain Information

publickey1.jp

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

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.

51/100

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=728

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Hiragino Kaku Gothic ProN

WCAG Partial

56/100

Readability

/30

16/30

14px · LH 1.50

Hierarchy

/20

8/20

WCAG

/25

18/25

3.46:1 min contrast

Performance

/25

14/25

1 font

Heading Font

Hiragino Kaku Gothic ProN

Body Font

Hiragino Kaku Gothic ProN

Sans14px

Contrast Ratio

3.46:1

Below AA

Reading Comfort

~38 CPL

Narrow lines

14px

⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

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

❌ Very complex text: Flesch score 0/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 0 elements below WCAG AA threshold (min 3.5:1).

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

✅ Lean font stack: 1 font families keeps load times fast.

Buy on MyFontsFlesch 0

Color Palette

8 unique colors

Light

#ffffff

Background· 59.50000000000001%

#192a3e

Primary· 7.4%

#bec5d3

Secondary· 7%

#6b8aac

Secondary· 4.9%

#3b467e

Secondary· 2.1%

#0c1221

Secondary· 1.8%

#0c4649

Accent· 0.9%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

9 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(2)securepubads.g.doubleclick.net(2)google-analytics.com(1)free.ranklet4.com(1)b.st-hatena.com(1)

Website Identity

publickey1.jp

Location detected: 🇯🇵 Japanvia tld

Social Profiles

Facebook X (Twitter)

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Last analyzed: 07 May 2026 at 11:28

Historical Analysis & Change Tracking