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audiobook.jp

https://audiobook.jp· First analyzed 16 May 2026· Updated 16 May 2026
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audiobook.jp
Desktop screenshot of audiobook.jp
Mobile screenshot of audiobook.jp
Mobile

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Hosting Provider

Google Cloud Platform
cloud.google.com

IP Address

34.149.18.20

Site Location

🇯🇵 Japanvia tld

Server Location

🇺🇸 Kansas City, United States

ASN

AS396982

Organization

Google Cloud

Server

Google Frontend

CDN

Cloudflare

WAF

Cloudflare

Nameservers

maria.ns.cloudflare.com.matt.ns.cloudflare.com.

Performance

94

Core Web Vitals

Weight

First Contentful Paint
1.2 s10%
Speed Index
1.6 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.8 MB
177 requests

Image Optimization

Lazy LoadWebP
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
BigCommerce

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

17 Technologies Detected

Analytics

5
Google Analytics
Google Analytics 4
Facebook PixelMicrosoft ClaritySentry

Advertising

4
Google AdsTikTok PixelMicrosoft AdvertisingOutbrain

Icon Libraries

2
Font AwesomeIonicons

Libraries

1
jQueryv1.9.1

CSS Frameworks

1
Tailwind CSS

Fonts

1
Google Fonts

Tag Managers

1
Google Tag Manager

Customer Support

1
Zendesk

Languages

1
Go

SEO Analysis

C62/100
15
10
1
Meta Tags10/15
Content10/12
Headings3/8
Technical14/25
E-E-A-T0/7
Images5/7
Links5/5
URL5/5
Social4/5
Freshness0/4
Mobile3/4
Indexability3/3
A
audiobook.jpaudiobook.jp

日本最大級のオーディオブック配信サービス - audiobook.jp

オーディオブックとは、ナレーターや声優が本を朗読した「聴く本」です。初回無料の「聴き放題プラン」でまずはお試しください。何かをしながら本を聴く「ながら読書」をはじめましょう。

Title Length35 chars

Recommended: 50-60 chars (~212px / 580px)

Description Length87 chars

Recommended: 120-160 chars

Issues (1)

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

11 issues found

Upgrade to view details

Crawlability

Sitemap
robots.txt

2 rules

Local SEO

Local Search Readiness

0/100
Poor
15 2

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

Sponsored

AI & LLM Readiness

D41/100
Bot Access
20/25
Machine Read.
10/25
Schema Data
0/25
Citation
11/25

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. listsnav
Text ratio:2%
Words:1,315
Token eff.:Optimal
Sections/1K:17.5
Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary36w
Descriptive Headingsavg 1.3w
Canonical URL
Open Graph3/3
Twitter Card1/3
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.
C
66/100
8
Passed
6
Critical
1
Warnings
Images & Alt Text
15/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
8/20
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
4/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
5 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.
57/100
C
186 mg
CO₂e / view
1.8 MB
Page Weight
50%
Cleaner Than
New Visitor
213 mg
vs
Returning (cached)
107 mg
Annual (10K/mo)
22.4 kg
Emission Segments
Data Center
9 mg
Network
55 mg
Device
123 mg
Resource Breakdown
JavaScript
472.0 KB
Images
779.0 KB
CSS
455.0 KB
Fonts
30.0 KB
HTML
40.3 KB
Other
69.1 KB
Green Hosting Verified
Google Cloud
GWF Verified
4 recommendations
  • •Carbon footprint recommendation preview...
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F

Security Score

21%Critical
Interactive

HTTPS

No WAF

57d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

13.04.2026

Valid Until

12.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

audiobook.jpwww.audiobook.jp

SHA-256 Fingerprint

B2:55:E2:DD:DC:BF:D7:1B:82:AB:DD:AE:1F:4D:D4:79:83:74:82:6F...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

alt-svc
h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
cache-control
🟡 0s(max-age=0, must-revalidate, private)
content-encoding
📦 Gzip(gzip)
content-length
40962
content-type
text/html; charset=UTF-8
date
Sat, 16 May 2026 05:14:54 GMT
Good Warning Issue

Email Infrastructure

Google Workspace

Score

65

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (5)

aspmx.l.google.com
alt2.aspmx.l.google.com
aspmx3.googlemail.com
aspmx2.googlemail.com

+1 more

Domain Information

audiobook.jp

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Privacy policy page linked

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.
A
81/100
Mobile Friendly45 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.
Viewport
width=device-width, initial-scale=1, viewport-fit=cover
1 recommendation
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

BlinkMacSystemFont

WCAG Partial
59/100
Readability
/30
16/30

11px · LH 1.50

Hierarchy
/20
8/20
WCAG
/25
13/25

3.35:1 min contrast

Performance
/25
22/25

System fonts

Heading Font

BlinkMacSystemFont

Sans

Body Font

BlinkMacSystemFont

Sans11px

Contrast Ratio

3.35:1

6 issues

Reading Comfort

~57 CPL

Optimal (45–75)
40px
h2
32px
h3
23px
h4
11px
p

❌ Critical: 11px body text is too small. Minimum 14px, recommend 16px+.

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

✅ Optimal line length: ~57 chars/line (ideal 45–75 CPL).

⚠️ Partial contrast: 6 elements below WCAG AA threshold (min 3.4:1).

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

⚠️ Fluid type without rem: clamp() detected but missing rem units. May fail WCAG 1.4.4 zoom test.

GGoogle FontsFluid Type

Color Palette

11 unique colors
5.54:1 AA Light
#ffffff
Background· 67.7%
#6d685e
Other· 2.9%
#e1325b
Primary· 0%
#d3ac8c
Secondary· 5.7%
#462232
Secondary· 4.6%
#fb4062
Accent· 4.3%
#f92354
Accent· 3%
#f1e1d5
Secondary· 2.5%

Business & Marketing Stack

7 Tools Detected

Enterprise

Behavior Analytics

3
Google Tag ManagerFree
Google AnalyticsFree
Microsoft ClarityFree

User behavior and product analytics

Advertising

3
Facebook PixelMid-Market
TikTok PixelMid-Market
Microsoft AdsEnterprise

Ad platforms and retargeting pixels

Social Media

1
Facebook SDKFree

Social widgets and sharing tools

3

Categories

7

Total Tools

1

Enterprise

2

Mid-Market

Assessment: Sophisticated marketing and sales technology infrastructure

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Scripts & Styles

23 Resources

20
Scripts
3
Styles
20
Async
0
Defer

Top Script Sources

googletagmanager.com(5)analytics.tiktok.com(3)connect.facebook.net(3)dmp.im-apps.net(2)scripts.clarity.ms(1)

Website Identity

audiobook.jp

Location detected: 🇯🇵 Japanvia tld
📧 Google Workspace

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Last analyzed: 16 May 2026 at 05:15

Historical Analysis & Change Tracking