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

cuhk.edu.hk

https://cuhk.edu.hk· First analyzed 12 Feb 2026· Updated 12 Feb 2026

Export

cuhk.edu.hk

Mobile

Sponsored

Hosting Provider

Nexus Guard Limited

IP Address

27.126.235.25

Server Location

🇭🇰 Hong Kong, Hong Kong

ASN

AS45474

Organization

Nexus Guard Limited

Server

Apache

Nameservers

ns4.gdnsec.com.dns2.cuhk.edu.hk.ns4.gdnsdef.com.anyns.cuhk.edu.hk.+1 more

Performance

Page Speed

4.2 MB

116 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

jQuery

Styling

Bootstrap

CMS

WordPress

Infrastructure

Hosting

Nexus Guard Limited

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

13 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Facebook Pixel Microsoft Clarity

Libraries

CSS Frameworks

Advertising

Google Ads LinkedIn Ads

Other

Modernizr

Tag Managers

Google Tag Manager

Web Servers

Apache

SEO Analysis

D52/100

cuhk.edu.hkcuhk.edu.hk

The Chinese University of Hong Kong

No description available for this page.

Title Length35 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

• Missing meta description - important for click-through rates

5 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

2 URLs

robots.txt

2 rules

Sponsored

Security Score

21%Critical

Interactive

HTTPS

No WAF

47d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

28.02.2025

Valid Until

31.03.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

www.cuhk.edu.hkcuhk.edu.hk

SHA-256 Fingerprint

E4:40:F7:4B:F5:59:E7:C6:8B:A3:43:F4:4D:B7:BF:D8:E7:FB:F9:35...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

connection

Keep-Alive

content-language

content-length

413

content-location

index.html.en

content-type

text/html

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

cuhk-st.in.tmes.trendmicro.com

Domain Information

cuhk.edu.hk

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Basel Grotesk light

57/100

Readability

/30

20/40

12px · LH 1.50

Hierarchy

/20

11/25

1.33x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Basel Grotesk light

Sans16px

Body Font

Basel Grotesk light

Sans12px

Contrast Ratio

Reading Comfort

Single Font Family

left aligned

16px

12px

❌ Critical: 12px body text is too small. Increase to at least 14px.

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

⚠️ Weak hierarchy: Headlines should be at least 2x body size for clear visual structure.

✅ Good performance: Using 1 font families keeps load times fast.

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

Buy on MyFonts

Business & Marketing Stack

6 Tools Detected

Enterprise

Behavior Analytics

Microsoft ClarityFree

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

LinkedIn AdsEnterprise

Ad platforms and retargeting pixels

Social Media

Facebook SDKFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

24 Resources

Scripts

Styles

Async

Defer

Top Script Sources

clarity.ms(10)connect.facebook.net(5)scripts.clarity.ms(2)snap.licdn.com(1)googletagmanager.com(1)

Website Identity

Facebook X (Twitter)Instagram YouTube

Sponsored

Last analyzed: 12 Feb 2026 at 23:52

Historical Analysis & Change Tracking