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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ardmediathek.de

https://ardmediathek.de· First analyzed 12 Feb 2026· Updated 12 Feb 2026

Export

ardmediathek.de

Mobile

Sponsored

Hosting Provider

Google Cloud Platform

cloud.google.com

IP Address

34.120.237.106

Server Location

🇺🇸 Kansas City, United States

ASN

AS396982

Organization

Google Cloud

Nameservers

ns01.brandshelter.com.ns02.brandshelter.net.

Performance

Page Speed

2.2 MB

94 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Google Cloud Platform

Progressive Web App

Web ManifestTheme Color

Technology Stack

2 Technologies Detected

UI Components

Swiper

CSS Frameworks

Tailwind CSS

SEO Analysis

A80/100

ardmediathek.deardmediathek.de

ARD Mediathek: Filme, Serien und Dokus online anschauen

Alle Inhalte der ARD Mediathek im Überblick: Livestreams, Nachrichten, Filme, Serien und spannende Dokus. Hier anschauen!

Title Length55 chars

Recommended: 50-60 chars

Description Length121 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (21/25)

2 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

74 rules

Sitemap reference found

Sponsored

Security Score

88%Very Good

Static / Informational

HTTPS

No WAF

110d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

19.01.2026

Valid Until

02.06.2026

OCSP Stapling

Enabled

Subject Alternative Names (20)

www.ard.dem.themenwoche.ard.demobil.themenwoche.ard.deprogramm-stage.ard.deprogramm.ard.desso-dev.swr.desso-test.sportschau.desso-test.swr.de+12 more

SHA-256 Fingerprint

E2:A1:F0:4A:7D:22:35:BA:14:07:05:D8:63:D2:39:FD:5E:89:7A:EC...

Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🟡 48s(public, max-age=48)

content-encoding

📦 Gzip(gzip)

content-length

55543

content-security-policy

default-src 'self';connect-src *;style-src 'self' 'unsafe-in...

content-type

text/html; charset=utf-8

cross-origin-opener-policy

same-origin-allow-popups

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

Domain Information

ardmediathek.de

Last Updated

29.08.2016

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

TheSans C5s

78/100

Readability

/30

32/40

18px · LH 1.40

Hierarchy

/20

25/25

2.21x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

TheSans C5s

Sans40px

Body Font

TheSans C5s

Sans18px

Contrast Ratio

Reading Comfort

~37 CPL

Needs attention

40px

32px

20px

18px

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

✅ Strong hierarchy: Headlines are 2.2x larger than body text.

✅ Good performance: Using 2 font families keeps load times fast.

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

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

✅ Protected text on images: Using gradient for readability.

Buy on MyFonts

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

3 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(1)

Website Identity

ardmediathek.de

Sponsored

Last analyzed: 12 Feb 2026 at 19:26

Historical Analysis & Change Tracking