dff.jp

https://dff.jp· First analyzed 12 May 2026· Updated 12 May 2026

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dff.jp

Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

57.180.255.237

Site Location

🇯🇵 Japanvia tld

Server Location

🇯🇵 Tokyo, Japan

ASN

AS16509

Organization

AWS EC2 (ap-northeast-1)

Server

Apache

Nameservers

ns-1910.awsdns-46.co.uk.ns-468.awsdns-58.com.ns-600.awsdns-11.net.ns-1229.awsdns-25.org.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.8 s10%

Speed Index

2.3 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

1.2 MB

65 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Amazon Web Services (AWS)

Technology Stack

8 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Facebook Pixel

Advertising

Google Ads Google AdSense

Libraries

jQueryv1.9.1

Fonts

Google Fonts

Web Servers

Apache

SEO Analysis

D49/100

Meta Tags8/15

Content6/12

Headings3/8

Technical14/25

E-E-A-T0/7

Images2/7

Links5/5

URL5/5

Social1/5

Freshness0/4

Mobile2/4

Indexability3/3

dff.jpdff.jp

sumabo クリックで救える命がある。 | dff.jp

dff.jpは、日本最大の「クリック募金」サイトです。募金ボタンをワンクリックするだけで無料で１円募金できる「クリック募金」にご協力ください。東日本大震災復興などを支援する「アンケート募金」も実施中です。

Title Length29 chars

Recommended: 50-60 chars (~178px / 580px)

Description Length102 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag — every page should have exactly one H1

13 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

117 URLs

robots.txt

2 rules

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

F32/100

Bot Access

20/25

Machine Read.

5/25

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

def. lists

Text ratio:1%

Words:182

Token eff.:Too Short

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary767w

Descriptive Headingsavg 1w

Canonical URL

Open Graph1/3

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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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.

74/100

Passed

Critical

Warnings

Images & Alt Text

15/20

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

Semantic Structure

18/20

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

7/15

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.

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.

45/100

128 mg

CO₂e / view

1.2 MB

Page Weight

70%

Cleaner Than

New Visitor

147 mg

Returning (cached)

73 mg

Annual (10K/mo)

15.4 kg

Emission Segments

Data Center

6 mg

Network

38 mg

Device

84 mg

Resource Breakdown

JavaScript

336.4 KB

Images

750.7 KB

CSS

32.3 KB

Fonts

4.2 KB

HTML

124.2 KB

Other

22.9 KB

Green Hosting Verified

Amazon Web Services (AWS)

Provider Match

6 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

315d

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/1.1

Valid From

20.02.2026

Valid Until

24.03.2027

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.dff.jpdff.jp

SHA-256 Fingerprint

34:26:5F:F9:F6:DF:FB:D1:0F:D3:FF:B9:0F:51:3B:30:31:47:03:EC...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-store, no-cache, must-revalidate, post-check=0, pre-check...)

connection

content-type

text/html

date

Tue, 12 May 2026 15:14:46 GMT

expires

Thu, 19 Nov 1981 08:52:00 GMT

pragma

no-cache

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

dff-jp.mail.protection.outlook.com

Domain Information

dff.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.

55/100

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=device-width, user-scalable=no, initial-scale=1, maximum-scale=1, minimum-scale=1

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

ＭＳＰゴシック

WCAG Partial

68/100

Readability

/30

21/30

16px · LH 1.40

Hierarchy

/20

16/20

1.62x ratio · ✓ H1→H6

WCAG

/25

16/25

4.13:1 min contrast

Performance

/25

15/25

1 font · 2 req

Heading Font

ＭＳＰゴシック

Sans26px

Body Font

ＭＳＰゴシック

Sans16px

Contrast Ratio

4.13:1

1 issue

Reading Comfort

~43 CPL

Narrow lines

26px

20px

15px

16px

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

✅ Optimal line spacing: 1.40 ratio (ideal range 1.4–1.6).

⚠️ Partial contrast: 1 elements below WCAG AA threshold (min 4.1:1).

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

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

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

GGoogle Fonts Buy on MyFonts

Color Palette

5 unique colors

5.74:1 AA Light

#ffffff

Text· 68.3%

#666666

Other· 16.6%

#d5d5b8

Primary· 7.2%

#f5eaa4

Accent· 3.8%

Business & Marketing Stack

5 Tools Detected

Enterprise

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Advertising

Google AdsEnterprise

Facebook PixelMid-Market

Ad platforms and retargeting pixels

Social Media

Facebook SDKFree

Twitter/X WidgetsFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

20 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(7)pagead2.googlesyndication.com(3)googletagmanager.com(2)connect.facebook.net(2)google-analytics.com(1)

Website Identity

dff.jp

Location detected: 🇯🇵 Japanvia tld

📧 Microsoft 365ja

Social Profiles

X (Twitter)

Sponsored

Last analyzed: 12 May 2026 at 15:15

Historical Analysis & Change Tracking