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.

Back to Search

nette.org

https://nette.org· First analyzed 16 Feb 2026· Updated 16 Feb 2026

Export

nette.org

Sponsored

Hosting Provider

CESNET-TCZ

IP Address

78.128.211.35

Server Location

🇨🇿 Prague, Czechia

ASN

AS2852

Organization

CESNET-TCZ

Server

Nginx

Nameservers

ns.forpsi.cz.ns.forpsi.it.ns.forpsi.net.

Performance

Page Speed

3 KB

22 requests

Image Optimization

WebP

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

CESNET-TCZ

Progressive Web App

Web ManifestApple Touch Icon

Technology Stack

4 Technologies Detected

Analytics

CSS Frameworks

Web Servers

SEO Analysis

A82/100

nette.orgnette.org

Nette – Comfortable and Safe Web Development in PHP

Nette is a family of mature and stand-alone components for PHP. Let them inspire you. Together, they create a framework rated as the 3rd most popular in the ...

Description truncated.

Title Length51 chars

Recommended: 50-60 chars

Description Length261 chars

Recommended: 120-160 chars

Issues (0)

2 issues found

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Crawlability

Sitemap

Type: standard

2,937 URLs

robots.txt

13 rules

Sitemap reference found

Sponsored

Security Score

56%Poor

Interactive

HTTPS

No WAF

50d

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

08.01.2026

Valid Until

08.04.2026

Subject Alternative Names (20)

ai.nette.orgapi.nette.orgapi.texy.infoblog.nette.orgbuiltwith.nette.orgdev.nette.orgdibi.nette.orgdoc.nette.org+12 more

SHA-256 Fingerprint

A6:77:98:38:65:57:35:78:AB:CF:55:71:72:5E:07:B7:7B:BD:DB:09...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=utf-8

date

Mon, 16 Feb 2026 18:50:42 GMT

server

nginx

strict-transport-security

max-age=31536000; includeSubDomains; preload

vary

Accept-Encoding, X-Requested-With, Accept-Language

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

vps.nette.org

Domain Information

nette.org

Domain Age

17y 5m

Created

29.08.2008

Expires

29.08.2027

Last Updated

01.07.2025

Registrar

Tucows Domains Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Data Protection Officer mentioned

Typography & Readability

Times New Roman

78/100

Readability

/30

30/40

16px · LH --

Hierarchy

/20

20/25

1.5x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Times New Roman

Serif24px

Body Font

Times New Roman

Serif16px

Contrast Ratio

Reading Comfort

~41 CPL

Needs attention

24px

16px

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

✅ Good hierarchy: Clear distinction between headlines and body text.

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

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

✅ Clean layout: Consistent left alignment throughout.

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

Google Tag ManagerFree

User behavior and product analytics

Sponsored

Scripts & Styles

5 Resources

Scripts

Styles

Async

Defer

Top Script Sources

files.nette.org(1)googletagmanager.com(1)nette.org(1)

Website Identity

X (Twitter)GitHub Discord

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Last analyzed: 16 Feb 2026 at 18:50

Historical Analysis & Change Tracking