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

uc.cn

https://uc.cn· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

uc.cn

Sponsored

Hosting Provider

Chinanet GD

IP Address

219.133.46.154

Server Location

🇨🇳 Shenzhen, China

ASN

AS4134

Organization

Chinanet GD

Server

Tengine

Nameservers

vip3.alidns.com.vip4.alidns.com.

Performance

Page Speed

3.8 MB

42 requests

Image Optimization

WebP

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Chinanet GD

Progressive Web App

Service Worker

Technology Stack

3 Technologies Detected

CSS Frameworks

Tailwind CSS

Bootstrap

Web Servers

Tengine

SEO Analysis

F23/100

uc.cnuc.cn

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Title Length18 chars

Recommended: 50-60 chars

Description Length63 chars

Recommended: 120-160 chars

Issues (3)

• Missing H1 tag - every page should have one H1
• Many images missing alt text (26/33)
• Missing viewport meta tag - page may not be mobile-friendly

9 issues found

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Security Score

56%Poor

Interactive

HTTPS

No WAF

144d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

GlobalSign nv-sa

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

09.06.2025

Valid Until

11.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (20)

*.tanx.com*.45E.alibaba-inc.com*.8.shareyouli.com*.9game.cn*.a-map.cn*.a-map.co*.a-map.link*.a-map.vip+12 more

SHA-256 Fingerprint

20:29:10:4A:67:32:E9:C8:17:B4:10:E1:0E:57:DD:04:7D:39:5C:32...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=utf-8

date

Tue, 17 Feb 2026 04:38:38 GMT

eagleeye-traceid

2150427e17713031185233830e0a8c, 212c9b8b17713031185196116e92...

fe-assets-env

prod

fe-assets-render-ts

1771303118527

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

mail.ucweb.com

Domain Information

uc.cn

DNSSEC

Not Enabled

Typography & Readability

arial

73/100

Readability

/30

32/40

14px · LH 1.57

Hierarchy

/20

8/25

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

arial

Body Font

arial

Sans14px

Contrast Ratio

Reading Comfort

Single Family

left aligned

⚠️ Small text: 14px may be hard to read on mobile. Consider 16px+.

✅ Optimal line spacing: 1.57 ratio ensures comfortable reading.

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

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Scripts & Styles

12 Resources

Scripts

Styles

Async

Defer

Top Script Sources

g.alicdn.com(8)log.mmstat.com(1)image.uc.cn(1)

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Last analyzed: 17 Feb 2026 at 04:39

Historical Analysis & Change Tracking