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

cnzz.com

https://cnzz.com· First analyzed 19 Feb 2026· Updated 19 Feb 2026

Export

cnzz.com

Sponsored

Hosting Provider

Alibaba Cloud

alibabacloud.com

IP Address

59.82.60.44

Server Location

🇨🇳 Hangzhou, China

ASN

AS37963

Organization

Hangzhou Alibaba Advertising Co., Ltd.

Server

Tengine

CDN

Nameservers

ns2.alibabadns.com.ns1.alibabadns.com.

Performance

Page Speed

457 KB

37 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

OpenCart

Technology Stack

3 Technologies Detected

Frameworks

Angular

CSS Frameworks

Tailwind CSS

Web Servers

Tengine

SEO Analysis

F35/100

cnzz.comcnzz.com

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Title Length11 chars

Recommended: 50-60 chars

Description Length113 chars

Recommended: 120-160 chars

Issues (2)

• Many images missing alt text (8/9)
• Missing viewport meta tag - page may not be mobile-friendly

8 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

2 rules

Sponsored

Security Score

76%Good

Static / Informational

HTTPS

No WAF

148d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

GlobalSign nv-sa

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

28.11.2025

Valid Until

18.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (20)

*.tbcdn.cn*.1688.com*.3c.tmall.com*.alibaba.com*.alicdn.com*.aliexpress.com*.alikunlun.com*.aliqin.tmall.com+12 more

SHA-256 Fingerprint

60:3C:41:A0:78:62:E6:5E:82:F0:FA:CF:5C:C9:D3:22:E4:64:EE:1A...

Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

age

32765

ali-swift-global-savetime

1771493114

cache-control

🔵 1 Days(max-age=86400)

content-encoding

⚡ Brotli(br)

content-md5

C3QxAAj1UXPl7+G6PtS7+w==

content-type

text/html; charset=utf-8

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

mx.cnzz.com

Domain Information

cnzz.com

Domain Age

25y 10m

Created

13.04.2000

Expires

13.04.2026

Last Updated

09.10.2025

Registrar

Alibaba Cloud Computing (Beijing) Co., Ltd.

DNSSEC

Not Enabled

Typography & Readability

tahoma

61/100

Readability

/30

40/40

30px · LH 1.50

Hierarchy

/20

8/25

0.4x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

tahoma

Sans12px

Body Font

tahoma

Sans30px

Contrast Ratio

Reading Comfort

~158 CPL

Needs attention

12px

30px

✅ Excellent readability: 30px body text is ideal for all devices.

✅ 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.

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

Buy on MyFonts

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

16 Resources

Scripts

Styles

Async

Defer

Top Script Sources

g.alicdn.com(12)o.alicdn.com(2)log.mmstat.com(1)

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Last analyzed: 19 Feb 2026 at 18:31

Historical Analysis & Change Tracking