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

weiyun.com

https://weiyun.com· First analyzed 15 Feb 2026· Updated 15 Feb 2026

Export

weiyun.com

Mobile

Sponsored

Hosting Provider

Chinanet GD

IP Address

59.36.121.241

Server Location

🇨🇳 Shenzhen, China

ASN

AS4134

Organization

Chinanet GD

Server

TAPISIX

Nameservers

ns3.qq.com.ns4.qq.com.ns1.qq.com.ns2.qq.com.

Performance

Page Speed

33 KB

10 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Chinanet GD

Technology Stack

2 Technologies Detected

Libraries

jQueryv1.8.3

Runtime

Node.jsv.

SEO Analysis

D47/100

weiyun.comweiyun.com

首页-腾讯微云

微云是腾讯公司为用户精心打造的一项智能云服务, 您可以通过微云方便地在手机和电脑之间同步文件、推送照片和传输数据。

Title Length7 chars

Recommended: 50-60 chars

Description Length57 chars

Recommended: 120-160 chars

Issues (1)

• Missing viewport meta tag - page may not be mobile-friendly

7 issues found

Upgrade to view details

Sponsored

Security Score

0%Critical

Critical / Transactional

HTTPS

No WAF

166d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert, Inc.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

26.07.2025

Valid Until

31.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (20)

weixin.qq.com*.cdn-go.cn*.cdn.myqcloud.com*.file.myqcloud.com*.gtimg.cn*.gtimg.com*.i.gtimg.cn*.idqqimg.com+12 more

SHA-256 Fingerprint

4F:47:4F:CE:9C:45:DC:59:2A:99:A3:C8:41:25:E5:CB:42:59:BE:98...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-cache)

cache-offline

false

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=utf-8

date

Sun, 15 Feb 2026 10:16:04 GMT

mod-map

weiyun_web:weiyun/web/sync.js

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

smtp.weiyun.com

Domain Information

weiyun.com

Domain Age

21y 4m

Created

20.10.2004

Expires

20.10.2032

Last Updated

27.02.2023

Registrar

MarkMonitor Information Technology (Shanghai) Co., Ltd.

DNSSEC

Not Enabled

Typography & Readability

-apple-system + helvetica

46/100

Readability

/30

40/40

16px · LH 1.50

Hierarchy

/20

8/25

0.75x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

-apple-system

Sans12px

Body Font

helvetica

Sans16px

Contrast Ratio

Reading Comfort

~124 CPL

Needs attention

12px

90px

36px

55px

16px

✅ Excellent readability: 16px 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.

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

⚠️ Risky: Text appears on background images without overlay protection.

❌ Very long lines: ~124 chars/line causes eye strain. Use max-width: 65ch.

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

3 Resources

Scripts

Styles

Async

Defer

Top Script Sources

imgcache.qq.com(1)tam.cdn-go.cn(1)

Sponsored

Last analyzed: 15 Feb 2026 at 10:16

Historical Analysis & Change Tracking