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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shanghairanking.com

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

Export

shanghairanking.com

Sponsored

Hosting Provider

Alibaba Cloud

alibabacloud.com

IP Address

121.41.224.230

Server Location

🇨🇳 Hangzhou, China

ASN

AS37963

Organization

Alibaba.com LLC

Server

Tengine

CDN

Nameservers

ns14.xincache.com.ns13.xincache.com.

Performance

Page Speed

5.4 MB

57 requests

0–49

50–89

90–100

Architecture Stack

Hybrid

⚙️ SSR

Frontend

Framework

Nuxt.js

Infrastructure

Hosting

Alibaba Cloud

CDN

Technology Stack

5 Technologies Detected

Analytics

Meta Frameworks

CSS Frameworks

Web Servers

SEO Analysis

F23/100

shanghairanking.comshanghairanking.com

ShanghaiRanking

No description available for this page.

Title Length15 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (3)

• Missing meta description - important for click-through rates
• Missing H1 tag - every page should have one H1
• Many images missing alt text (27/30)

8 issues found

Upgrade to view details

Sponsored

Security Score

21%Critical

Interactive

HTTPS

No WAF

133d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

iTrusChina Co., Ltd.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

03.06.2025

Valid Until

03.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.shanghairanking.comshanghairanking.com

SHA-256 Fingerprint

4E:02:A3:AA:7B:76:14:78:F6:B2:4F:7D:3D:5F:D9:6B:97:0F:BB:16...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

age

ali-swift-global-savetime

1771525505

content-encoding

⚡ Brotli(br)

content-length

16308

content-type

text/html

date

Thu, 19 Feb 2026 18:25:05 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (2)

qiye163mx01.mxmail.netease.com

qiye163mx02.mxmail.netease.com

Domain Information

shanghairanking.com

Domain Age

16y 11m

Created

27.03.2009

Expires

27.03.2027

Last Updated

24.06.2022

Registrar

Xin Net Technology Corporation

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Roboto

56/100

Readability

/30

40/40

16px · LH 1.63

Hierarchy

/20

8/25

WCAG

/25

5/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

Roboto

Body Font

Roboto

Sans16px

Contrast Ratio

Reading Comfort

~74 CPL

Optimal (45–75)

16px

✅ Excellent readability: 16px body text is ideal for all devices.

✅ Optimal line spacing: 1.62 ratio ensures comfortable reading.

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

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

✅ Optimal line length: ~74 characters per line is comfortable to read.

⚠️ Cramped layout: 8 elements lack adequate spacing.

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

Google Tag ManagerFree

User behavior and product analytics

Sponsored

Scripts & Styles

20 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(18)google-analytics.com(1)googletagmanager.com(1)

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Last analyzed: 19 Feb 2026 at 18:25

Historical Analysis & Change Tracking