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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tool.chinaz.com

https://tool.chinaz.com· First analyzed 16 Feb 2026· Updated 16 Feb 2026

Export

tool.chinaz.com

Sponsored

Hosting Provider

Chinanet FJ

IP Address

117.25.139.70

Server Location

🇨🇳 Wenquan, China

ASN

AS4134

Organization

Chinanet FJ

Server

OpenResty

Performance

Page Speed

1 KB

68 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Chinanet FJ

Technology Stack

5 Technologies Detected

Libraries

Other

CSS Frameworks

Analytics

Web Servers

SEO Analysis

F23/100

tool.chinaz.comtool.chinaz.com

站长工具 - 站长之家

站长工具是站长的必备工具。经常上站长工具可以了解SEO数据变化。还可以检测网站死链接、蜘蛛访问、HTML格式检测、网站速度测试、友情链接检查、网站域名IP查询、PR、权重查询、alexa、whois查询等等。

Title Length11 chars

Recommended: 50-60 chars

Description Length104 chars

Recommended: 120-160 chars

Issues (3)

• Missing H1 tag - every page should have one H1
• Many images missing alt text (17/17)
• Missing viewport meta tag - page may not be mobile-friendly

9 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

7 rules

Sponsored

Security Score

46%Poor

Interactive

HTTPS

No WAF

173d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

TrustAsia Technologies, Inc.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

15.07.2025

Valid Until

08.08.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.chinaz.comchinaz.com

SHA-256 Fingerprint

57:1F:67:15:9F:04:37:97:31:44:90:8F:D9:D2:DB:5D:86:1C:BE:12...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🟣 Private(private)

content-encoding

📦 Gzip(gzip)

content-length

13826

content-type

text/html; charset=utf-8

date

Mon, 16 Feb 2026 23:43:01 GMT

origin-agent-cluster

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

tool.chinaz.com

Domain Age

23y 2m

Created

19.12.2002

Expires

19.12.2026

Last Updated

20.10.2023

Registrar

eName Technology Co., Ltd.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

Typography & Readability

Source Han Sans CN

41/100

Readability

/30

5/40

12px · LH 3.33

Hierarchy

/20

25/25

2.17x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Source Han Sans CN

Sans26px

Body Font

Source Han Sans CN

Sans12px

Contrast Ratio

Reading Comfort

~152 CPL

Needs attention

26px

14px

12px

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

⚠️ Wide line spacing (3.33). Consider 1.4-1.8 for better flow.

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

✅ Good performance: Using 2 font families keeps load times fast.

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

✅ Protected text on images: Using gradient for readability.

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Microsoft ClarityFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

csstools.chinaz.com(15)zz.bdstatic.com(1)scripts.clarity.ms(1)clarity.ms(1)hm.baidu.com(1)

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Last analyzed: 16 Feb 2026 at 23:43

Historical Analysis & Change Tracking