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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zeroweb.kr

https://zeroweb.kr· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

zeroweb.kr

Mobile

Sponsored

Hosting Provider

Shinbinet IDC

IP Address

210.127.209.92

Server Location

🇰🇷 Seoul, South Korea

ASN

AS17833

Organization

Shinbinet IDC

Server

Apache

Nameservers

ns2.zeroweb.kr.ns.zeroweb.kr.

Performance

Page Speed

7.8 MB

63 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Shinbinet IDC

Technology Stack

9 Technologies Detected

Libraries

jQueryv2.2.4

jQuery UI

Other

GSAPv3.9.1 ScrollMagic

CSS Frameworks

Web Servers

Languages

Customer Support

SEO Analysis

D47/100

zeroweb.krzeroweb.kr

ZEROWEB

IT기술로 사람의 움직임을 연구하고 분석하여 데이터 산업의 혁신을 견인하는 기업

Title Length7 chars

Recommended: 50-60 chars

Description Length44 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (45/45)

7 issues found

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Security Score

21%Critical

Interactive

HTTPS

No WAF

283d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

12.11.2025

Valid Until

27.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.zeroweb.krzeroweb.kr

SHA-256 Fingerprint

0F:F6:E7:36:93:60:0A:98:C8:DF:A3:A0:40:3C:72:2B:12:F8:27:1C...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-store, no-cache, must-revalidate, post-check=0, pre-check...)

connection

Keep-Alive

content-type

text/html

date

Tue, 17 Feb 2026 20:24:33 GMT

expires

Thu, 19 Nov 1981 08:52:00 GMT

keep-alive

timeout=5, max=100

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

mail.zeroweb.kr

Domain Information

zeroweb.kr

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

LINESeedKR + Pretendard Variable

86/100

Readability

/30

40/40

20px · LH 1.60

Hierarchy

/20

25/25

4x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

LINESeedKR

Sans80px

Body Font

Pretendard Variable

Sans20px

Contrast Ratio

Reading Comfort

~39 CPL

Needs attention

80px

63px

36px

20px

✅ Excellent readability: 20px body text is ideal for all devices.

✅ Optimal line spacing: 1.60 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 4.0x larger than body text.

✅ Good performance: Using 2 font families keeps load times fast.

⚠️ 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

24 Resources

Scripts

Styles

Async

Defer

Top Script Sources

.(10)cdnjs.cloudflare.com(4)code.jquery.com(1)local(1)ajax.googleapis.com(1)

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Last analyzed: 17 Feb 2026 at 20:24

Historical Analysis & Change Tracking