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.

Back to Search

cf.ac.uk

https://cf.ac.uk· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

cf.ac.uk

Sponsored

Hosting Provider

Squiz hosting

IP Address

43.245.41.93

Server Location

🇦🇺 Sydney, Australia

ASN

AS55532

Organization

Squiz hosting

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

mnetidns01.cf.ac.uk.mnetidns02.cf.ac.uk.ns3.ja.net.

Performance

Page Speed

714 KB

26 requests

Image Optimization

Lazy LoadResponsiveimgix

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Tailwind CSS

Infrastructure

Hosting

Squiz hosting

CDN

Cloudflare

Technology Stack

5 Technologies Detected

Analytics

CSS Frameworks

Tag Managers

CDN

SEO Analysis

D58/100

cf.ac.ukcf.ac.uk

Cardiff University

Cardiff University is a top five university for research excellence in a beautiful, student-friendly capital city. We welcome the sharpest minds from across ...

Description truncated.

Title Length18 chars

Recommended: 50-60 chars

Description Length167 chars

Recommended: 120-160 chars

Issues (0)

6 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

13 rules

Sitemap reference found

Sponsored

Security Score

36%Critical

Interactive

HTTPS

WAF

78d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

05.02.2026

Valid Until

06.05.2026

Subject Alternative Names (1)

www.cardiff.ac.uk

SHA-256 Fingerprint

BF:D4:9A:B7:B6:EC:05:BF:5E:44:08:23:5C:4E:59:7F:9B:D3:DB:10...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

age

alt-svc

h3=":443"; ma=86400

cache-control

🟡 0s(private, max-age=0)

cf-cache-status

HIT

cf-ray🇩🇪 Frankfurt

9cf67a516a8d65c4-FRA

content-encoding

⚡ Brotli(br)

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

cf-ac-uk.mail.protection.outlook.com

Domain Information

cf.ac.uk

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Cookie consent banner detected

Typography & Readability

Arial

73/100

Readability

/30

32/40

18px · LH 1.33

Hierarchy

/20

21/25

2.22x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

10/20

3 fonts

Heading Font

Arial

Sans40px

Body Font

Arial

Sans18px

Contrast Ratio

Reading Comfort

~35 CPL

Needs attention

40px

32px

28px

18px

✅ Excellent readability: 18px body text is ideal for all devices.

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

✅ Consistent design: Single font family with weight variations is a modern best practice.

⚠️ Cramped layout: 15 elements lack adequate spacing.

✅ Clean layout: Consistent left alignment throughout.

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

9 Resources

Scripts

Styles

Async

Defer

Top Script Sources

d3q5dbq2rziek.cloudfront.net(3)googletagmanager.com(2)widget.geckoengage.com(1)

Website Identity

Facebook Instagram TikTok

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Last analyzed: 17 Feb 2026 at 15:57

Historical Analysis & Change Tracking