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

radio.cz

https://radio.cz· First analyzed 16 Feb 2026· Updated 16 Feb 2026

Export

radio.cz

Mobile

Sponsored

Hosting Provider

Cesky rozhlas - Radio Praha

IP Address

195.113.180.104

Server Location

🇨🇿 Prague, Czechia

ASN

AS2852

Organization

Cesky rozhlas - Radio Praha

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

west.ns.cloudflare.com.susan.ns.cloudflare.com.

Performance

Page Speed

753 KB

31 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Drupalv7

Technology Stack

9 Technologies Detected

Libraries

Analytics

Other

CSS Frameworks

Tag Managers

CDN

Languages

SEO Analysis

C68/100

radio.czradio.cz

News from the Czech Republic | Radio Prague International

Czech Republic, News coverage, interviews, features and an online archive in six languages.

Title Length57 chars

Recommended: 50-60 chars

Description Length91 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag - every page should have one H1

4 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

70 URLs

robots.txt

34 rules

Sitemap reference found

Sponsored

Security Score

51%Poor

Interactive

HTTPS

WAF

54d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

12.01.2026

Valid Until

12.04.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

radio.cz*.radio.cz

SHA-256 Fingerprint

80:F8:7B:16:83:1B:11:25:23:B6:79:5A:3A:16:A2:CA:34:85:44:EA...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

date

Mon, 16 Feb 2026 13:05:07 GMT

content-type

text/html; charset=utf-8

server

cloudflare

x-content-type-options

nosniff

x-powered-by

PHP/7.2.34

x-drupal-cache

MISS

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (5)

ns2.cro.cz

ns1.cro.cz

rs.cesnet.cz

ddei1.cro.cz

+1 more

Domain Information

radio.cz

Domain Age

29 years

Created

13.02.1997

Expires

06.10.2026

Last Updated

22.06.2022

Registrar

REG-ACTIVE24

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Data Protection Officer mentioned

Typography & Readability

Helvetica

62/100

Readability

/30

24/40

15px · LH 1.38

Hierarchy

/20

8/25

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

Helvetica

Sans

Body Font

Helvetica

Sans15px

Contrast Ratio

Reading Comfort

~58 CPL

Optimal (45–75)

22px

28px

15px

Major Third

Scale

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

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

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

✅ Protected text on images: Using overlay for readability.

✅ Optimal line length: ~58 characters per line is comfortable to read.

⚠️ Cramped layout: 63 elements lack adequate spacing.

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Social Media

Facebook SDKFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

17 Resources

Scripts

Styles

Async

Defer

Top Script Sources

english.radio.cz(7)googletagmanager.com(3)spir.hit.gemius.pl(1)

Website Identity

Facebook X (Twitter)Instagram

Sponsored

Last analyzed: 16 Feb 2026 at 13:05

Historical Analysis & Change Tracking