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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line.me

https://line.me· First analyzed 10 Feb 2026· Updated 10 Feb 2026

Export

line.me

Mobile

Sponsored

Hosting Provider

LY Corporation

IP Address

147.92.243.206

Server Location

🇯🇵 Chiyoda City, Japan

ASN

AS38631

Organization

LY Corporation

Server

VOS

CDN

CloudFront

Nameservers

ns1.naver.jp.ns2.naver.jp.ans1.linecorp.com.ans2.linecorp.com.

Performance

Page Speed

537 KB

151 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

LY Corporation

CDN

CloudFront

Technology Stack

4 Technologies Detected

UI Components

CSS Frameworks

Analytics

Tag Managers

SEO Analysis

D47/100

line.meline.me

LINE｜always at your side.

More than just a messenger app. LINE is new level of communication and the very infrastructure of your life.

Title Length25 chars

Recommended: 50-60 chars

Description Length108 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag - every page should have one H1
• Many images missing alt text (191/191)

6 issues found

Upgrade to view details

Sponsored

Security Score

76%Good

Static / Informational

HTTPS

No WAF

170d

Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🟡 300s(public,max-age=300)

content-encoding

⚡ Brotli(br)

content-type

text/html

date

Tue, 10 Feb 2026 19:42:14 GMT

etag

W/"68a301114dc39dafa7a0d9ababb6ac22"

last-modified

Tue, 26 Aug 2025 04:39:14 GMT

Good Warning Issue

Typography & Readability

SFPro

76/100

Readability

/30

40/40

20px · LH 1.60

Hierarchy

/20

15/25

1x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

SFPro

Sans20px

Body Font

SFPro

Sans20px

Contrast Ratio

Reading Comfort

~47 CPL

Optimal (45–75)

20px

70px

40px

18px

20px

Perfect Fifth

Scale

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

✅ Optimal line spacing: 1.60 ratio ensures comfortable reading.

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

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

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

✅ Optimal line length: ~46 characters per line is comfortable to read.

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

10 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(4)googletagmanager.com(2)google-analytics.com(1)cdn.jsdelivr.net(1)

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Last analyzed: 10 Feb 2026 at 19:42

Historical Analysis & Change Tracking