What does StackOptic analyze?

StackOptic runs 18 analysis modules on any public website from a single URL. It detects 7,000+ technologies (CMS, frameworks, analytics, payments, CDN, hosting), evaluates SSL certificates and HTTP security headers with grades from A+ to F, measures Core Web Vitals (LCP, CLS, TBT, FCP), audits SEO meta tags and structured data, checks email security (SPF, DKIM, DMARC), analyzes AI & LLM readiness including bot access and llms.txt validation, extracts color palettes and typography, estimates carbon footprint, and generates permanent shareable reports.

Does it work on sites behind Cloudflare or bot protection?

Yes. StackOptic uses a real browser engine that loads pages exactly like a human visitor — executing JavaScript, rendering CSS, and handling redirects. This allows it to bypass Cloudflare, LiteSpeed, Sucuri, and other bot protection systems where traditional crawlers and HTTP-only tools fail.

What do I get on the free plan?

The free plan includes 5 analyses per day with access to all 18 modules, full scores, technology detection, and security grades. Every report is permanently accessible via a unique shareable URL — no login required to view. No credit card needed. AI-powered insights, re-analysis, PDF/JSON export, and comparison features are available on Pro ($24/mo) and Agency ($99/mo) plans.

What is AI & LLM readiness analysis?

This module evaluates how visible and citable your website is to AI search engines like ChatGPT, Perplexity, Google AI Overviews, and Claude. It audits access permissions for 8 major AI bots, validates llms.txt and llms-full.txt files, scores citation-ready content structure, and analyzes structured data (JSON-LD) for GEO readiness — helping you rank in the next generation of search.

How long does an analysis take?

Most analyses complete in under 10 seconds. StackOptic runs all 18 modules in parallel using a real browser session, so you get technology detection, security audit, performance metrics, SEO analysis, and AI readiness scoring simultaneously.

How accurate are the results?

Detection is based on real browser execution — DOM inspection, JavaScript runtime analysis, HTTP headers, and DNS records. With 7,000+ technology signatures and Lighthouse-calibrated performance scoring, StackOptic achieves high accuracy for mainstream technologies.

What security checks are performed?

The security module evaluates SSL/TLS certificates, 12+ HTTP security headers (HSTS, CSP, X-Frame-Options, Permissions-Policy, Referrer-Policy), HTTPS enforcement, and email authentication (SPF, DKIM, DMARC). Each site receives a letter grade from A+ to F with specific remediation steps.

Do you store the websites I analyze?

StackOptic only stores publicly available information that any visitor to a website would see — HTML content, HTTP headers, DNS records, and screenshots. We do not access private data, log in to websites, or perform any intrusive testing.

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slotozilla.com

https://slotozilla.com· First analyzed 22 Apr 2026· Updated 22 Apr 2026

Export

slotozilla.com

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

172.66.171.189

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

coco.ns.cloudflare.com.kellen.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

466 ms10%

Speed Index

606 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

3.6 MB

115 requests

Image Optimization

Lazy LoadWebPAVIFResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPress

cms

12002 - SlotozillaCustom

by TRAFFIC GATE

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

12 Technologies Detected

Plugins

Xteam Casino Base Custom Table Of Content Elasticpress

Custom Advanced Classic Editor

Analytics

CSS Frameworks

Tag Managers

Reviews

CDN

Security

SEO Analysis

B75/100

Meta Tags13/15

Content3/12

Headings8/8

Technical18/21

E-E-A-T7/7

Images4/7

Links5/5

URL5/5

Social4/5

Freshness2/4

Mobile3/4

Indexability3/3

slotozilla.comslotozilla.com

Slotozilla – Your Trusted Gambling Source

Slotozilla provides expert reviews of the online casinos in the world, the latest bonus deals, and a huge selection of free casino games. Read our guides and...

Description truncated.

Title Length41 chars

Recommended: 50-60 chars (~246px / 580px)

Description Length169 chars

Recommended: 120-160 chars

Issues (1)

• Very thin content (6 words). Search engines need substantial content for ranking.

4 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

1 rules

Allows all crawlers

Local SEO

Local Search Readiness

17/100

Poor

5 13 1

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

Sponsored

AI & LLM Readiness

F38/100

Bot Access

20/25

Machine Read.

7/25

Schema Data

7/25

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:1%

Words:1,881

Token eff.:Optimal

Structured Data

2 JSON-LD

Person×1.3(min)Organization×1.1WebSite

sameAs entity links

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 (11)

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.

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

14/15

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

1/15

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.

37/100

368 mg

CO₂e / view

3.6 MB

Page Weight

15%

Cleaner Than

New Visitor

421 mg

Returning (cached)

210 mg

Annual (10K/mo)

44.2 kg

Emission Segments

Data Center

18 mg

Network

108 mg

Device

242 mg

Resource Breakdown

JavaScript

354.6 KB

Images

657.2 KB

CSS

2.3 MB

Fonts

60.0 KB

HTML

166.3 KB

Other

348 B

Green Hosting Verified

Cloudflare

GWF Verified

5 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

85%Very Good

Critical / Transactional

HTTPS

WAF

86d

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

19.04.2026

Valid Until

18.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

slotozilla.com*.slotozilla.com

SHA-256 Fingerprint

E8:9A:33:D2:B1:92:DE:F9:B1:6F:7F:97:FD:58:FD:2C:9B:F0:19:FA...

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🟡 4 Hours(max-age=14400)

cf-cache-status

HIT

cf-ray🇩🇪 Frankfurt

9f0705ec7f54d2e7-FRA

content-encoding

⚡ Brotli(br)

content-security-policy

default-src *.youtube.com *.plerdy.com plerdy.com; connect-s...

content-type

text/html; charset=UTF-8

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (3)

route2.mx.cloudflare.net

route1.mx.cloudflare.net

route3.mx.cloudflare.net

Domain Information

slotozilla.com

Domain Age

13y 3m

Created

02.01.2013

Expires

02.01.2030

Last Updated

25.11.2025

Registrar

Moniker Online Services LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Cookie consent banner detected

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.

62/100

Mobile Friendly564 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, user-scalable=no

3 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Montserrat + Open Sans

WCAG Partial

67/100

Readability

/30

18/30

14px · LH 1.71

Hierarchy

/20

19/20

3.14x ratio · ✓ H1→H6

WCAG

/25

16/25

1:1 min contrast

Performance

/25

14/25

2 fonts · 7 req

Heading Font

Montserrat

Sans44px

Body Font

Open Sans

Sans14px

Contrast Ratio

1:1

9 issues

Reading Comfort

~37 CPL

Narrow lines

44px

28px

14px

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

⚠️ Hard to read: Flesch score 49/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 9 elements below WCAG AA threshold (min 1.0:1).

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

✅ Strong hierarchy: Headlines are 3.1x larger than body text.

✅ Lean font stack: 2 font families keeps load times fast.

Buy on MyFontsFlesch 49

Color Palette

6 unique colors

Light

#313250

Secondary· 39.99999999999999%

#23243a

Primary· 29.599999999999998%

#393e6a

Primary· 11.2%

#7f7a92

Secondary· 7.6%

#b3c1c4

Secondary· 6%

#554b78

Secondary· 5.5%

Business & Marketing Stack

3 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

Microsoft ClarityFree

User behavior and product analytics

Sponsored

Scripts & Styles

25 Resources

Scripts

Styles

Async

Defer

Top Script Sources

slotozilla.com(10)googletagmanager.com(2)scripts.clarity.ms(1)clarity.ms(1)static.cloudflareinsights.com(1)

Website Identity

Slotozilla – Your Trusted Gambling Source

Slotozilla provides expert reviews of the online casinos in the world, the latest bonus deals, and a huge selection of free casino games. Read our guides and play smart.

www.slotozilla.com/

13 years old

Location detected: 🇨🇦 Canadavia ip

Moniker Online Services LLCen

Social Profiles

Facebook X (Twitter)LinkedIn YouTube Pinterest

Sponsored

Last analyzed: 22 Apr 2026 at 19:27

Historical Analysis & Change Tracking