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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khan.co.kr

https://khan.co.kr· First analyzed 18 Feb 2026· Updated 18 Feb 2026

Export

khan.co.kr

Sponsored

Hosting Provider

NAVER Cloud Corp.

IP Address

106.10.35.103

Server Location

🇰🇷 Seongnam-si, South Korea

ASN

AS135354

Organization

NAVER Cloud Corp.

Server

Apache

Nameservers

ns1-2.ns-ncloud.com.ns1-1.ns-ncloud.com.

Performance

Page Speed

335 KB

107 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

NAVER Cloud Corp.

Technology Stack

11 Technologies Detected

Analytics

Advertising

Libraries

UI Components

CSS Frameworks

Tag Managers

Web Servers

Languages

SEO Analysis

B70/100

khan.co.krkhan.co.kr

경향신문

경향신문은 사원이 주인입니다. 권력과 자본에 속박되지 않고 독자가 궁금해하는 뉴스를 진실되게 전달합니다.

Title Length4 chars

Recommended: 50-60 chars

Description Length58 chars

Recommended: 120-160 chars

Issues (0)

4 issues found

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Crawlability

Sitemap

Type: index

4 URLs

robots.txt

18 rules

Sitemap reference found

Sponsored

Security Score

21%Critical

Interactive

HTTPS

No WAF

322d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert Inc

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

07.01.2026

Valid Until

06.01.2027

OCSP Stapling

Enabled

Subject Alternative Names (20)

news.khan.co.kr70.khan.co.kradvimg.khan.co.krall.khan.co.kranalytics.khan.co.krapi.khan.co.krbiz.khan.co.krblog.khan.co.kr+12 more

SHA-256 Fingerprint

DC:E3:4D:7B:B8:3E:1E:D8:36:D2:E4:B5:E3:EF:97:6D:9F:AB:A9:AA...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

connection

keep-alive

content-encoding

📦 Gzip(gzip)

content-length

47361

content-type

text/html; charset=UTF-8

date

Wed, 18 Feb 2026 09:20:40 GMT

server

Apache

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

wblock.khan.co.kr

Domain Information

khan.co.kr

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

Typography & Readability

Pretendard Variable + sans-serif

63/100

Readability

/30

25/40

16px · LH 1.00

Hierarchy

/20

15/25

1x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Pretendard Variable

Sans16px

Body Font

sans-serif

Sans16px

Contrast Ratio

Reading Comfort

~39 CPL

Needs attention

16px

Minor Second

Scale

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

⚠️ Tight line spacing (1.00). Consider 1.4-1.6 for better readability.

⚠️ Weak hierarchy: Headlines should be at least 2x body size for clear visual structure.

✅ 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 gradient for readability.

Buy on MyFonts

Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

Microsoft ClarityFree

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

TaboolaMid-Market

Ad platforms and retargeting pixels

Sponsored

Scripts & Styles

23 Resources

Scripts

Styles

Async

Defer

Top Script Sources

static.khan.co.kr(7)googletagmanager.com(4)youtube.com(3)scripts.clarity.ms(2)clarity.ms(2)

Website Identity

Facebook X (Twitter)Instagram YouTube TikTok

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Last analyzed: 18 Feb 2026 at 09:21

Historical Analysis & Change Tracking