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

docin.com

https://docin.com· First analyzed 20 Feb 2026· Updated 20 Feb 2026

Export

docin.com

Sponsored

Hosting Provider

Shinenet

IP Address

221.122.132.138

Server Location

🇨🇳 Beijing, China

ASN

AS23724

Organization

Shinenet

Server

Nginx

Nameservers

ns5.domainmonger.com.ns8.domainmonger.com.ns7.domainmonger.com.ns6.domainmonger.com.

Performance

Page Speed

2 KB

46 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Shinenet

Technology Stack

6 Technologies Detected

Libraries

Analytics

Web Servers

SEO Analysis

D58/100

docin.comdocin.com

Docin.com豆丁网-分享文档发现价值

豆丁网是面向全球的中文社会化阅读分享平台，拥有商业,教育,研究报告,行业资料,学术论文,认证考试,星座,心理学等数亿实用文档和书刊杂志。

Title Length22 chars

Recommended: 50-60 chars

Description Length68 chars

Recommended: 120-160 chars

Issues (0)

6 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

4,886 URLs

robots.txt

43 rules

Sitemap reference found

Sponsored

Security Score

25%Critical

Critical / Transactional

HTTPS

No WAF

328d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Zhejiang Huluwa Digital Certification Co., Ltd.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

14.01.2026

Valid Until

14.01.2027

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.docin.comdocin.com

SHA-256 Fingerprint

CB:94:45:7B:C5:54:72:CA:40:13:C9:76:1E:5D:22:64:85:C5:B7:A9...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

connection

keep-alive

content-encoding

📦 Gzip(gzip)

content-language

en-GB

content-security-policy

default-src * 'unsafe-inline' 'unsafe-eval' data: blob:; fra...

content-type

text/html;charset=UTF-8

date

Fri, 20 Feb 2026 05:23:12 GMT

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

MX Records (5)

alt1.aspmx.l.google.com

aspmx.l.google.com

aspmx3.googlemail.com

aspmx2.googlemail.com

+1 more

Domain Information

docin.com

Domain Age

22y 8m

Created

27.06.2003

Expires

27.06.2033

Last Updated

07.02.2024

Registrar

NetEarth One Inc. d/b/a NetEarth

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

Typography & Readability

-apple-system

60/100

Readability

/30

40/40

16px · LH 1.75

Hierarchy

/20

20/25

1.5x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

-apple-system

Sans24px

Body Font

-apple-system

Sans16px

Contrast Ratio

Reading Comfort

~94 CPL

Needs attention

24px

18px

14px

16px

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

✅ Optimal line spacing: 1.75 ratio ensures comfortable reading.

✅ Good hierarchy: Clear distinction between headlines and body text.

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

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

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

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

Google Tag ManagerFree

User behavior and product analytics

Sponsored

Scripts & Styles

17 Resources

Scripts

Styles

Async

Defer

Top Script Sources

hs.douding.cn(13)googletagmanager.com(1)

Sponsored

Last analyzed: 20 Feb 2026 at 05:24

Historical Analysis & Change Tracking

docin.com

Docin.com豆丁网-分享文档 发现价值

Docin.com豆丁网-分享文档发现价值