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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fliphtml5.com

https://fliphtml5.com· First analyzed 11 Feb 2026· Updated 11 Feb 2026

Export

fliphtml5.com

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

172.66.166.102

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

armfazh.ns.cloudflare.com.fatima.ns.cloudflare.com.

Performance

Page Speed

3.1 MB

88 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

jQuery

Styling

Bootstrap

CMS

WordPress

Infrastructure

Hosting

Cloudflare

CDN

Cloudflare

Technology Stack

22 Technologies Detected

CSS Frameworks

Bootstrap

Tailwind CSS

Chakra UI

Advertising

Criteo Taboola Outbrain

Payments

Analytics

Customer Support

Plugins

Frameworks

Libraries

UI Components

Tag Managers

Social

Comments

CDN

SEO Analysis

C67/100

fliphtml5.comfliphtml5.com

Top FlipBook Maker & Digital Publishing Platform - FlipHTML5

FlipHTML5 converts your PDF, PPT, Word & images to flipbook online, perfect for creating digital publications such as magazines, brochures, and catalogs. Cre...

Description truncated.

Title Length60 chars

Recommended: 50-60 chars

Description Length199 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (1883/1934)

4 issues found

Upgrade to view details

Sponsored

Security Score

5%Critical

Critical / Transactional

HTTPS

WAF

30d

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-headers

token,HTTP_TOKEN

age

2026

cache-control

🟡 120s(max-age=120)

cf-apo-via

origin,host

cf-cache-status

HIT

cf-ray🇩🇪 Frankfurt

9cbff67c9e8e3630-FRA

Good Warning Issue

Typography & Readability

Inter + sans-serif

82/100

Readability

/30

32/40

15px · LH 1.60

Hierarchy

/20

25/25

4.53x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

Inter

Sans68px

Body Font

sans-serif

Sans15px

Contrast Ratio

Reading Comfort

~53 CPL

Optimal (45–75)

68px

42px

44px

15px

⚠️ Small text: 15px may be hard to read on mobile. Consider 16px+.

✅ Optimal line spacing: 1.60 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 4.5x larger than body text.

✅ Excellent performance: System fonts eliminate font loading delays (better LCP).

✅ Smart font loading: Using font-display: swap prevents invisible text during load.

✅ Protected text on images: Using gradient for readability.

Buy on MyFonts

Business & Marketing Stack

6 Tools Detected

Enterprise

Customer Support

IntercomMid-Market

ZendeskEnterprise

Live chat and helpdesk tools

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

CookiebotMid-Market

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

25 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(12)consent.cookiebot.com(3)widget.intercom.io(1)consentcdn.cookiebot.com(1)static.fliphtml5.com(1)

Website Identity

fliphtml5.com

Sponsored

Last analyzed: 11 Feb 2026 at 01:10

Historical Analysis & Change Tracking