StackOptic
Back to Search
sister-sites.co.uk favicon

sister-sites.co.uk

https://sister-sites.co.uk· First analyzed 15 May 2026· Updated 15 May 2026
Export
sister-sites.co.uk
Desktop screenshot of sister-sites.co.uk
Mobile screenshot of sister-sites.co.uk
Mobile

Sponsored

Hosting Provider

Cloudflare
cloudflare.com

IP Address

172.66.42.246

Site Location

🇬🇧 United Kingdomvia tld

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

bella.ns.cloudflare.com.noah.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
269 ms10%
Speed Index
350 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
135 KB
20 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Tailwind CSS
CMS
WordPress
Infrastructure
Hosting
Cloudflare
CDN
Cloudflare

Technology Stack

5 Technologies Detected

Analytics

2
Google Analytics
Google Analytics 4

Other

1
lazysizes

CSS Frameworks

1
Tailwind CSS

CDN

1
Cloudflare

SEO Analysis

A+92/100
30
2
0
Meta Tags13/15
Content10/12
Headings8/8
Technical24/25
E-E-A-T5/7
Images7/7
Links4/5
URL5/5
Social5/5
Freshness4/4
Mobile4/4
Indexability3/3
S
sister-sites.co.uksister-sites.co.uk

Sister Sites ✔ Your Trusted UK Source for Sister Sites in 2025

The UK's #1 website for sister sites in online gambling. Browse thousands of online casinos, bingo and sports betting websites and understand how they are re...

Description truncated.
Title Length62 chars

Recommended: 50-60 chars (~373px / 580px)

Description Length186 chars

Recommended: 120-160 chars

Issues (0)

    2 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: index

    3 URLs

    3 sub-sitemaps

    robots.txt

    5 rules

    Sitemap reference found

    Local SEO

    Local Search Readiness

    19/100
    Poor
    5 13

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

    Sponsored

    AI & LLM Readiness

    D54/100
    Bot Access
    20/25
    Machine Read.
    11/25
    Schema Data
    8/25
    Citation
    15/25

    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:6%
    Words:2,710
    Token eff.:Optimal
    Sections/1K:0.4
    Depth:1/5

    Structured Data

    5 JSON-LD
    Organization×1.1WebSiteVideoObjectBreadcrumbList
    sameAs entity links

    Citation Readiness

    Opening Summary73w
    Descriptive Headingsavg 4.5w
    Canonical URL
    Open Graph3/3
    Twitter Card3/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (7)
    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.
    A
    83/100
    15
    Passed
    2
    Critical
    1
    Warnings
    Images & Alt Text
    20/20
    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
    10/15
    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
    7/15
    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.
    82/100
    A+
    14 mg
    CO₂e / view
    135.1 KB
    Page Weight
    95%
    Cleaner Than
    New Visitor
    16 mg
    vs
    Returning (cached)
    8 mg
    Annual (10K/mo)
    1.6 kg
    Emission Segments
    Data Center
    <0.001 g
    Network
    4 mg
    Device
    9 mg
    Resource Breakdown
    JavaScript
    353 B
    Images
    60.9 KB
    HTML
    73.9 KB
    Green Hosting Verified
    Cloudflare
    GWF Verified
    3 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    F

    Security Score

    26%Critical
    Interactive

    HTTPS

    WAF

    79d

    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

    Valid From

    04.05.2026

    Valid Until

    02.08.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (2)

    sister-sites.co.uk*.sister-sites.co.uk

    SHA-256 Fingerprint

    A4:C4:E4:15:DB:90:F5:A6:C0:AE:97:A9:9A:F5:23:36:9A:2F:78:A2...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    cache-control
    🟡 600s(max-age=600, must-revalidate)
    cf-apo-via
    tcache
    cf-cache-status
    HIT
    cf-edge-cache
    cache,platform=wordpress
    cf-ray🇫🇷 Paris
    9fbe57ea69a797c1-CDG
    content-encoding
    ⚡ Brotli(br)
    Good Warning Issue

    Email Infrastructure

    Google Workspace

    Score

    20

    SPF
    DKIM
    DMARC

    MX Records (5)

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

    +1 more

    Domain Information

    sister-sites.co.uk

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Cookiebot

    Cookie Consent Banner
    Cookiebot
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    CMP: Cookiebot
    Privacy policy page linked
    Data Protection Officer mentioned

    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.
    B
    78/100
    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
    2 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Apple Color Emoji

    WCAG AA
    79/100
    Readability
    /30
    25/30

    16px · LH 1.75

    Hierarchy
    /20
    17/20

    2.25x ratio · ✓ H1→H6

    WCAG
    /25
    21/25

    6.87:1 min contrast

    Performance
    /25
    16/25

    1 font

    Heading Font

    Apple Color Emoji

    Sans36px

    Body Font

    Apple Color Emoji

    Sans16px

    Contrast Ratio

    6.87:1

    WCAG AA (≥4.5:1)

    Reading Comfort

    ~39 CPL

    Narrow lines
    36px
    h1
    36px
    h2
    24px
    h3
    16px
    p

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

    ⚠️ Hard to read: Flesch score 44/100. Simplify sentences for wider reach.

    ✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 6.9:1).

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

    ✅ Strong hierarchy: Headlines are 2.2x larger than body text.

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

    Buy on MyFontsFlesch 44

    Color Palette

    7 unique colors
    Light
    #eff6ff
    Background· 72.8%
    #132552
    Primary· 6.8%
    #1e3b8a
    Primary· 5.5%
    #dceafd
    Primary· 4.7%
    #3b414d
    Secondary· 3.7%
    #5a85b8
    Secondary· 3.2%
    #bdc7d1
    Secondary· 3.1%

    Business & Marketing Stack

    1 Tools Detected

    Growing

    Behavior Analytics

    1
    Google AnalyticsFree

    User behavior and product analytics

    1

    Categories

    1

    Total Tools

    0

    Enterprise

    0

    Mid-Market

    Assessment: Growing marketing technology adoption

    Sponsored

    Scripts & Styles

    7 Resources

    6
    Scripts
    1
    Styles
    3
    Async
    2
    Defer

    Top Script Sources

    googletagmanager.com(2)google-analytics.com(1)js.hcaptcha.com(1)sister-sites.co.uk(1)static.cloudflareinsights.com(1)

    Website Identity

    Sister Sites

    Sister Sites

    Organization

    The UK's #1 website for sister sites in online gambling. Browse thousands of online casinos, bingo and sports betting websites and understand how they are related through their operator.

    www.sister-sites.co.uk
    Location detected: 🇬🇧 United Kingdomvia tld
    📧 Google Workspaceen-GB

    Social Profiles

    X (Twitter)YouTube

    Sponsored

    Last analyzed: 15 May 2026 at 01:24

    Historical Analysis & Change Tracking