20jack.com

https://20jack.com· First analyzed 04 Jun 2026· Updated 04 Jun 2026

Export

20jack.com

Mobile

Sponsored

Hosting Provider

velia.net

IP Address

209.126.105.72

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 St Louis, United States

ASN

AS30083

Organization

velia.net

Server

Nginx

Nameservers

dns3.name-services.com.dns1.name-services.com.dns5.name-services.com.dns4.name-services.com.+1 more

Performance

Core Web Vitals

Weight

First Contentful Paint

1.1 s10%

Speed Index

1.5 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

1.8 MB

47 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPressv7.0

cms

RetroTubev1.9.1Custom

by WP-Script

View Theme

Technology Stack

8 Technologies Detected

Plugins

Touchy By Bonfire Wps Disclaimer

Libraries

CSS Frameworks

Icon Libraries

Fonts

Web Servers

Languages

SEO Analysis

D52/100

Meta Tags9/15

Content7/12

Headings8/8

Technical12/21

E-E-A-T0/7

Images3/7

Links2/5

URL5/5

Social0/5

Freshness0/4

Mobile3/4

Indexability3/3

20jack.com20jack.com

後宮電影院 – 免費成人影片(免費A片.日本AV.國產AV.成人卡通.歐美影片)線上觀看

No description available for this page.

Title Length44 chars

Recommended: 50-60 chars (~264px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

• Missing meta description — important for click-through rates in SERPs

10 issues found

Upgrade to view details

Local SEO

Local Search Readiness

4/100

Poor

1 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

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

nav

Text ratio:2%

Words:275

Token eff.:Too Short

Sections/1K:7.3

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary18w

Descriptive Headingsavg 1.4w

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...

Upgrade to view recommendations

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

20/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

3/15

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

15/15

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.

2 recommendations

•Accessibility recommendation preview...

Upgrade to view recommendations

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.

31/100

231 mg

CO₂e / view

1.8 MB

Page Weight

50%

Cleaner Than

New Visitor

264 mg

Returning (cached)

132 mg

Annual (10K/mo)

27.7 kg

Emission Segments

Data Center

52 mg

Network

55 mg

Device

124 mg

Resource Breakdown

JavaScript

64.0 KB

Images

1.5 MB

CSS

235.6 KB

Fonts

1.8 KB

HTML

18.5 KB

Other

18.6 KB

Green Hosting Not Verified

velia.net

6 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

0%Critical

Critical / Transactional

HTTPS

No WAF

83d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

28.05.2026

Valid Until

26.08.2026

Subject Alternative Names (6)

18jack.com20jack.com20jack.netwww.18jack.comwww.20jack.comwww.20jack.net

SHA-256 Fingerprint

99:6B:D6:4B:1B:5E:4C:E4:13:47:41:96:63:B6:D3:02:15:3A:D3:A0...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

connection

keep-alive

content-encoding

⚡ Brotli(br)

content-type

text/html; charset=UTF-8

date

Thu, 04 Jun 2026 08:15:15 GMT

link

<https://20jack.com/index.php?rest_route=/>; rel="https://ap...

server

nginx

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

20jack.com

Domain Age

23y 4m

Created

24.01.2003

Expires

24.01.2035

Last Updated

04.12.2025

Registrar

eNom, LLC

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.

70/100

Mobile Friendly5 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=1.0, maximum-scale=1.0, user-scalable=0

2 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

sans-serif

WCAG Partial

76/100

Readability

/30

25/30

16px · LH 1.50

Hierarchy

/20

18/20

2x ratio · ✓ H1→H6

WCAG

/25

18/25

2.54:1 min contrast

Performance

/25

15/25

0 fonts · 2 req

Heading Font

sans-serif

Sans32px

Body Font

sans-serif

Sans16px

Contrast Ratio

2.54:1

1 issue

Reading Comfort

~40 CPL

Narrow lines

32px

30px

19px

16px

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

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

✅ Easy to read: Flesch score 79/100 — accessible to general audiences.

⚠️ Partial contrast: 1 elements below WCAG AA threshold (min 2.5:1).

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

✅ Strong hierarchy: Headlines are 2.0x larger than body text.

GGoogle FontsFlesch 79

Color Palette

4 unique colors

Dark

#000000

Background· 60.8%

#2a201f

Primary· 23.799999999999997%

#110e0c

Secondary· 12.3%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

16 Resources

Scripts

Styles

Async

Defer

Top Script Sources

20jack.com(10)

Website Identity

20jack.com

23 years old

Location detected: 🇺🇸 United Statesvia ip

eNom, LLCzh-TW

Sponsored

Last analyzed: 04 Jun 2026 at 08:15

Historical Analysis & Change Tracking