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

zblogcn.com

https://zblogcn.com· First analyzed 12 Feb 2026· Updated 12 Feb 2026

Export

zblogcn.com

Mobile

Sponsored

Hosting Provider

CNC Group CHINA169 Shanxi Province Network

IP Address

221.204.209.225

Server Location

🇨🇳 Taiyuan, China

ASN

AS4837

Server

OpenResty

Performance

Page Speed

712 KB

17 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

CNC Group CHINA169 Shanxi Province Network

Technology Stack

4 Technologies Detected

UI Components

Swiper Fancybox

Libraries

jQuery

Web Servers

OpenRestyv1.25.3.1

SEO Analysis

D41/100

zblogcn.comzblogcn.com

ZBlog、Z-Blog官方网站，开源免费、小巧强大的博客程序与CMS建站系统

No description available for this page.

Title Length39 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

• Missing meta description - important for click-through rates
• Missing H1 tag - every page should have one H1

6 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

3 rules

Sponsored

Security Score

76%Good

Static / Informational

HTTPS

No WAF

25d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

ZeroSSL

Key Algorithm

RSA (2048 bit)

Signature

SHA-384 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

09.12.2025

Valid Until

09.03.2026

OCSP Stapling

Enabled

Subject Alternative Names (3)

zblogcn.com*.zblogcn.comverify.app.zblogcn.com

SHA-256 Fingerprint

A4:FC:0C:9B:08:6E:39:A6:DD:AE:0F:7D:2B:18:E6:44:CF:1F:52:B8...

Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🔴 No Cache(private, no-cache)

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=UTF-8

date

Thu, 12 Feb 2026 18:20:57 GMT

eo-cache-status

MISS

eo-log-uuid

8737773615462907498

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

zblogcn.com

Domain Age

11y 11m

Created

21.02.2014

Expires

21.02.2027

Last Updated

18.07.2025

Registrar

DNSPod, Inc.

DNSSEC

Not Enabled

Typography & Readability

Penrose

66/100

Readability

/30

40/40

18px · LH 1.56

Hierarchy

/20

8/25

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Penrose

Sans

Body Font

Penrose

Sans18px

Contrast Ratio

Reading Comfort

~50 CPL

Optimal (45–75)

38px

30px

18px

✅ Excellent readability: 18px body text is ideal for all devices.

✅ Optimal line spacing: 1.56 ratio ensures comfortable reading.

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

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

✅ Protected text on images: Using text-shadow for readability.

✅ Optimal line length: ~50 characters per line is comfortable to read.

Buy on MyFonts

Sponsored

Scripts & Styles

7 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(4)

Website Identity

GitHub

Sponsored

Last analyzed: 12 Feb 2026 at 18:21

Historical Analysis & Change Tracking