21casino.com

https://21casino.com· First analyzed 13 May 2026· Updated 13 May 2026

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21casino.com

Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

13.33.235.2

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 New York, United States

ASN

AS16509

Organization

AWS CloudFront (GLOBAL)

Server

Apache

CDN

CloudFront

Nameservers

ns-63.awsdns-07.com.ns-1114.awsdns-11.org.ns-1637.awsdns-12.co.uk.ns-539.awsdns-03.net.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.1 s10%

Speed Index

1.4 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

1.3 MB

49 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Magento

Progressive Web App

PWA ReadyWeb ManifestService WorkerApple Touch IconTheme Color

Technology Stack

14 Technologies Detected

Analytics

CSS Frameworks

Icon Libraries

Font Awesome Material Icons

Frameworks

Fonts

Tag Managers

Advertising

Web Servers

Customer Support

SEO Analysis

F33/100

Meta Tags4/15

Content0/12

Headings0/8

Technical17/25

E-E-A-T0/7

Images1/7

Links0/5

URL5/5

Social0/5

Freshness0/4

Mobile3/4

Indexability3/3

21casino.com21casino.com

21 Casino

No description available for this page.

Title Length9 chars

Recommended: 50-60 chars (~51px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (4)

• Missing meta description — important for click-through rates in SERPs
• Very thin content (2 words). Search engines need substantial content for ranking.
• Missing H1 tag — every page should have exactly one H1

11 issues found

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Crawlability

Sitemap

robots.txt

2 rules

Allows all crawlers

Local SEO

Local Search Readiness

7/100

Poor

2 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

F25/100

Bot Access

20/25

Machine Read.

1/25

Schema Data

0/25

Citation

4/25

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:0%

Words:13

Token eff.:Too Short

Structured Data

No Schema

Citation Readiness

Opening Summary

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.

63/100

Passed

Critical

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

12/15

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.

56/100

136 mg

CO₂e / view

1.3 MB

Page Weight

70%

Cleaner Than

New Visitor

155 mg

Returning (cached)

77 mg

Annual (10K/mo)

16.3 kg

Emission Segments

Data Center

7 mg

Network

40 mg

Device

89 mg

Resource Breakdown

JavaScript

507.1 KB

Images

55.3 KB

CSS

143.2 KB

Fonts

570.8 KB

HTML

51.2 KB

Other

13.9 KB

Green Hosting Verified

Amazon Web Services (AWS)

Provider Match

6 recommendations

•Carbon footprint recommendation preview...

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A+

Security Score

98%Excellent

Static / Informational

HTTPS

No WAF

177d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Amazon

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

08.10.2025

Valid Until

06.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (18)

21casino.comgate777.com*.reelisland.com*.playgrandcasino.complayzee.comslotplanet.comreelisland.comcasilando.com+10 more

SHA-256 Fingerprint

72:1A:AC:9F:FB:42:9F:20:A3:F1:A6:C9:6B:17:BC:55:39:08:EB:01...

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HTTP Headers

Developer Console

content-encoding

📦 Gzip(gzip)

content-security-policy

frame-ancestors 'self';

content-type

text/html; charset=UTF-8

date

Wed, 13 May 2026 04:07:39 GMT

last-modified

Wed, 13 May 2026 04:07:39 GMT

referrer-policy

no-referrer-when-downgrade

Good Warning Issue

Email Infrastructure

Rackspace Email

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

mx1.emailsrvr.com

mx2.emailsrvr.com

Domain Information

21casino.com

Domain Age

27y 2m

Created

17.03.1999

Expires

17.03.2031

Last Updated

17.03.2026

Registrar

GoDaddy.com, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

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.

67/100

Mobile Friendly155 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, height=device-height, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no, viewport-fit=cover

3 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Open Sans

61/100

Readability

/30

16/30

14px · LH 1.71

Hierarchy

/20

10/20

WCAG

/25

19/25

Performance

/25

16/25

1 font · 4 req

Heading Font

Open Sans

Body Font

Open Sans

Sans14px

Contrast Ratio

Reading Comfort

Single Family

left aligned

14px

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

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

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

✅ Smart font loading: font-display: swap prevents invisible text during load (FOIT).

Buy on MyFontsFlesch 0

Color Palette

2 unique colors

Light

#111016

Primary· 99.3%

#2f271d

Secondary· 0.7%

Business & Marketing Stack

6 Tools Detected

Enterprise

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

HotjarMid-Market

User behavior and product analytics

Advertising

Facebook PixelMid-Market

Twitter/X AdsMid-Market

Ad platforms and retargeting pixels

Social Media

Facebook SDKFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

15 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(3)connect.facebook.net(2).(2)sdk-cdn.optimove.net(1)acdn.adnxs.com(1)

Website Identity

21casino.com

27 years old

Location detected: 🇺🇸 United Statesvia ip

GoDaddy.com, LLC📧 Rackspace Emailen-US

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Last analyzed: 13 May 2026 at 04:08

Historical Analysis & Change Tracking