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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yesky.com

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

Export

yesky.com

Mobile

Sponsored

Hosting Provider

Beijing Baidu Netcom Science and Technology Co., Ltd.

IP Address

120.48.6.179

Server Location

🇨🇳 Beijing, China

ASN

AS38365

Organization

Beijing Baidu Netcom Science and Technology Co., Ltd.

Server

Nginx

Nameservers

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

Performance

Page Speed

87 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Beijing Baidu Netcom Science and Technology Co., Ltd.

Technology Stack

7 Technologies Detected

Advertising

Google Ads Google AdSense

Frameworks

Libraries

UI Components

Web Servers

Customer Support

SEO Analysis

F37/100

yesky.comyesky.com

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Title Length15 chars

Recommended: 50-60 chars

Description Length109 chars

Recommended: 120-160 chars

Issues (3)

• Missing H1 tag - every page should have one H1
• Many images missing alt text (104/163)
• Missing viewport meta tag - page may not be mobile-friendly

8 issues found

Upgrade to view details

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Security Score

21%Critical

Interactive

HTTPS

No WAF

333d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

sslTrus

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

14.01.2026

Valid Until

14.01.2027

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.yesky.comyesky.com

SHA-256 Fingerprint

25:AE:BB:8B:EE:2A:E3:6A:1B:4B:8E:32:B3:24:DB:24:90:75:27:22...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

age

cache-control

🟡 60s(max-age=60)

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=gb2312

date

Sun, 15 Feb 2026 06:55:57 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (2)

mxbiz1.qq.com

mxbiz2.qq.com

Domain Information

yesky.com

Domain Age

26y 1m

Created

12.01.2000

Expires

12.01.2033

Last Updated

03.03.2025

Registrar

Alibaba Cloud Computing (Beijing) Co., Ltd.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

Typography & Readability

微软雅黑

14/100

Readability

/30

5/40

12px · LH 2.33

Hierarchy

/20

8/25

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

微软雅黑

Sans

Body Font

微软雅黑

Sans12px

Contrast Ratio

Reading Comfort

Single Font Family

left aligned

24px

21px

16px

12px

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

⚠️ Wide line spacing (2.33). Consider 1.4-1.8 for better flow.

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

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

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

⚠️ Cramped layout: 149 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

27 Resources

Scripts

Styles

Async

Defer

Top Script Sources

s01.yesky.com(14)resource.yesky.com(5)hm.baidu.com(1)

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Last analyzed: 15 Feb 2026 at 06:56

Historical Analysis & Change Tracking

yesky.com

天极网 科技悠生活.遇见新未来

天极网科技悠生活.遇见新未来