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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karuka.tech

https://karuka.tech· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

karuka.tech

Mobile

Sponsored

Hosting Provider

Hetzner

hetzner.com

IP Address

168.119.108.108

Server Location

🇩🇪 Falkenstein, Germany

ASN

AS24940

Organization

Hetzner

Nameservers

oxygen.ns.hetzner.com.helium.ns.hetzner.de.hydrogen.ns.hetzner.com.

Performance

Page Speed

168 KB

4 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Hetzner

Technology Stack

3 Technologies Detected

CSS Frameworks

Tailwind CSS

Semantic UI

Libraries

jQueryv3.3.1

SEO Analysis

F23/100

karuka.techkaruka.tech

karuka.tech

No description available for this page.

Title Length11 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

7 issues found

Upgrade to view details

Sponsored

Security Score

71%Good

Static / Informational

HTTPS

No WAF

47d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

06.01.2026

Valid Until

06.04.2026

Subject Alternative Names (2)

*.pages.karuka.techpages.karuka.tech

SHA-256 Fingerprint

6D:5C:E9:62:DB:CA:0B:4A:4D:46:5F:10:20:04:19:48:B5:54:A1:07...

Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🟡 600s(max-age=600)

content-length

6885

content-type

text/html; charset=utf-8

date

Tue, 17 Feb 2026 22:54:18 GMT

etag

"84de014f61bd6a72db5da826e01cc4f1328f3b5344c2167dbbf813d3fa1...

expires

Wed, 18 Feb 2026 00:04:18 CET

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

mta.prd.fsn1.karuka.tech

Domain Information

karuka.tech

Domain Age

5y 5m

Created

14.09.2020

Expires

14.09.2026

Last Updated

19.09.2025

Registrar

INWX GmbH

DNSSEC

Not Enabled

Typography & Readability

Lato + Helvetica Neue

68/100

Readability

/30

32/40

14px · LH 1.43

Hierarchy

/20

8/25

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Lato

Body Font

Helvetica Neue

Sans14px

Contrast Ratio

Reading Comfort

Mixed Pairing

center aligned

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

✅ Optimal line spacing: 1.43 ratio ensures comfortable reading.

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

✅ Clean layout: Consistent center alignment throughout.

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Scripts & Styles

4 Resources

Scripts

Styles

Async

Defer

Top Script Sources

code.jquery.com(1)cdn.jsdelivr.net(1)

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Last analyzed: 17 Feb 2026 at 22:54

Historical Analysis & Change Tracking