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

jl.gov.cn

https://jl.gov.cn· First analyzed 19 Feb 2026· Updated 19 Feb 2026

Export

jl.gov.cn

Sponsored

Hosting Provider

China Mobile

IP Address

111.26.224.43

Server Location

🇨🇳 Jilin, China

ASN

AS134810

Organization

China Mobile

Server

Apache

Nameservers

ns2.jljlptt.net.cn.ns.jlccptt.net.cn.

Performance

Page Speed

2.9 MB

52 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

China Mobile

Technology Stack

3 Technologies Detected

Libraries

jQuery

UI Components

Swiper

Web Servers

Apachev2.2.21

SEO Analysis

F23/100

jl.gov.cnjl.gov.cn

吉林省人民政府

No description available for this page.

Title Length7 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 (13/25)

8 issues found

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Security Score

21%Critical

Interactive

HTTPS

No WAF

197d

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/1.1

Valid From

05.08.2025

Valid Until

04.09.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.jl.gov.cnjl.gov.cn

SHA-256 Fingerprint

45:44:0E:66:92:CB:62:44:5C:33:62:FA:43:E0:1A:85:53:84:12:88...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

content-length

74887

content-type

text/html

date

Thu, 19 Feb 2026 22:34:00 GMT

etag

"2c20d3b1-12487-64b2833607b40"

last-modified

Thu, 19 Feb 2026 07:24:53 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

mail.jl.gov.cn

Domain Information

jl.gov.cn

DNSSEC

Not Enabled

Typography & Readability

Microsoft YaHei

31/100

Readability

/30

22/40

14px · LH --

Hierarchy

/20

8/25

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Microsoft YaHei

Sans

Body Font

Microsoft YaHei

Sans14px

Contrast Ratio

Reading Comfort

~69 CPL

Optimal (45–75)

18px

14px

⚠️ Small text: 14px may be hard to read on mobile. Consider 16px+.

✅ 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.

✅ Optimal line length: ~69 characters per line is comfortable to read.

⚠️ Cramped layout: 25 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

19 Resources

Scripts

Styles

Async

Defer

Top Script Sources

.(11)auth.mangren.com(1)ta.trs.cn(1)

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Last analyzed: 19 Feb 2026 at 22:34

Historical Analysis & Change Tracking