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

siol.net

https://siol.net· First analyzed 19 Feb 2026· Updated 19 Feb 2026

Export

siol.net

Sponsored

Hosting Provider

Styria IT Solutions d.o.o.

IP Address

193.25.220.193

Server Location

🇭🇷 Buzin, Croatia

ASN

AS51577

Organization

Styria IT Solutions d.o.o.

Server

Nginx

Nameservers

taurus-2.siol.net.taurus-1.siol.net.

Performance

Page Speed

2.4 MB

109 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Styria IT Solutions d.o.o.

Progressive Web App

PWA ReadyWeb ManifestService WorkerApple Touch IconTheme Color

Technology Stack

7 Technologies Detected

Analytics

Meta Frameworks

CSS Frameworks

Fonts

Tag Managers

Web Servers

SEO Analysis

B76/100

siol.netsiol.net

Siol.net

Najbolj sveže in aktualne novice iz Slovenije in sveta, intervjuji, kolumne, odlične zgodbe iz sveta športa, avtomobilov in trendov

Title Length8 chars

Recommended: 50-60 chars

Description Length131 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag - every page should have one H1

3 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

8 rules

Sponsored

Security Score

36%Critical

Interactive

HTTPS

No WAF

212d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

GoDaddy.com, Inc.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

09.09.2025

Valid Until

19.09.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.siol.netsiol.net

SHA-256 Fingerprint

C4:21:7C:06:37:E6:C0:1E:C8:20:C5:F1:1C:CC:DC:71:BF:16:B7:A9...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=utf-8

date

Thu, 19 Feb 2026 12:31:53 GMT

server

nginx

strict-transport-security

max-age=31536000

vary

Accept-Encoding, Cookie

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

mailhub.siol.net

Domain Information

siol.net

Domain Age

29y 10m

Created

28.04.1996

Expires

19.11.2029

Last Updated

22.08.2024

Registrar

Tucows Domains Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Didomi

Cookie Consent Banner

Didomi

GDPR Indicators

Cookie consent banner detected

CMP: Didomi

Data Protection Officer mentioned

Typography & Readability

Merriweather + Arial

63/100

Readability

/30

32/40

15px · LH 1.60

Hierarchy

/20

8/25

WCAG

/25

11/15

Contrast: undefined

Performance

/25

17/20

System fonts

Heading Font

Merriweather

Serif

Body Font

Arial

Sans15px

Contrast Ratio

Reading Comfort

~52 CPL

Optimal (45–75)

32px

24px

16px

15px

⚠️ Small text: 15px may be hard to read on mobile. Consider 16px+.

✅ Optimal line spacing: 1.60 ratio ensures comfortable reading.

✅ Excellent performance: System fonts eliminate font loading delays (better LCP).

✅ Smart font loading: Using font-display: swap prevents invisible text during load.

✅ Optimal line length: ~52 characters per line is comfortable to read.

⚠️ Cramped layout: 93 elements lack adequate spacing.

GGoogle Fonts

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

16 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(4)script.dotmetrics.net(3)files.upscore.com(2)sdk.privacy-center.org(2)googletagmanager.com(1)

Website Identity

Facebook X (Twitter)Instagram LinkedIn YouTube Pinterest

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Last analyzed: 19 Feb 2026 at 12:32

Historical Analysis & Change Tracking