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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krakow.pl

https://krakow.pl· First analyzed 12 Feb 2026· Updated 12 Feb 2026

Export

krakow.pl

Mobile

Sponsored

Hosting Provider

Academic Computer Centre CYFRONET AGH

IP Address

149.156.2.195

Server Location

🇵🇱 Krakow, Poland

ASN

AS8267

Organization

Academic Computer Centre CYFRONET AGH

Server

Nginx

CDN

Nameservers

info.cyf-kr.edu.pl.nms.cyf-kr.edu.pl.dns.fuw.edu.pl.bilbo.nask.org.pl.

Performance

Page Speed

443 KB

68 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Academic Computer Centre CYFRONET AGH

CDN

Technology Stack

3 Technologies Detected

CSS Frameworks

Tailwind CSS

Icon Libraries

Font Awesome

Web Servers

Nginx

SEO Analysis

F29/100

krakow.plkrakow.pl

Oficjalny serwis miejski - Oficjalny serwis miejski - Magiczny Kraków

No description available for this page.

Title Length69 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

8 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

2 rules

Sponsored

Security Score

21%Critical

Interactive

HTTPS

No WAF

58d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

12.01.2026

Valid Until

12.04.2026

Subject Alternative Names (2)

*.krakow.plkrakow.pl

SHA-256 Fingerprint

F0:AD:2C:D9:45:5A:9A:47:1A:99:AD:30:6F:39:BB:2A:68:02:EF:92...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🟡 0s(max-age=0, must-revalidate, private)

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=UTF-8

date

Thu, 12 Feb 2026 22:52:59 GMT

etag

W/"56db0e8e34b609e7d0fbbec37839bf71"

expires

Thu, 12 Feb 2026 22:52:59 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

srvmx.cyfronet.pl

Domain Information

krakow.pl

Domain Age

25y 1m

Created

01.01.2001

Expires

31.12.2026

Last Updated

18.12.2024

Registrar

Akademickie Centrum Komputerowe CYFRONET AGH

DNSSEC

Not Enabled

Typography & Readability

Lato Black + Lato

46/100

Readability

/30

40/40

18px · LH 1.44

Hierarchy

/20

8/25

WCAG

/25

5/15

Contrast: undefined

Performance

/25

10/20

3 fonts

Heading Font

Lato Black

Sans

Body Font

Lato

Sans18px

Contrast Ratio

Reading Comfort

Dual Sans-Serif

left aligned

19px

18px

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

✅ Optimal line spacing: 1.44 ratio ensures comfortable reading.

⚠️ Risky: Text appears on background images without overlay protection.

⚠️ Cramped layout: 26 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

19 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(17)

Website Identity

Facebook X (Twitter)Instagram LinkedIn

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Last analyzed: 12 Feb 2026 at 22:53

Historical Analysis & Change Tracking