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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freitag.de

https://freitag.de· First analyzed 23 Apr 2026· Updated 23 Apr 2026

Export

freitag.de

Mobile

Sponsored

Hosting Provider

Flying Circus Internet Operations GmbH

IP Address

185.105.252.15

Site Location

🇩🇪 Germanyvia tld

Server Location

🇩🇪 Oberhausen, Germany

ASN

AS41981

Organization

Flying Circus Internet Operations GmbH

Server

Nginx

CDN

Varnish

Nameservers

ns3.fcio.net.ns4.fcio.net.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

678 ms10%

Speed Index

881 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

5.7 MB

198 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Flying Circus Internet Operations GmbH

CDN

Varnish

Technology Stack

10 Technologies Detected

Analytics

Google Analytics

Matomo Microsoft Clarity

CSS Frameworks

Tag Managers

Advertising

Web Servers

Languages

Customer Support

SEO Analysis

C68/100

Meta Tags8/15

Content3/12

Headings8/8

Technical23/25

E-E-A-T2/7

Images4/7

Links5/5

URL5/5

Social3/5

Freshness0/4

Mobile4/4

Indexability3/3

freitag.defreitag.de

der Freitag — Die Wochenzeitung für Politik, Wirtschaft und Kultur

Die Wochenzeitung für Politik, Wirtschaft und Kultur

Title Length66 chars

Recommended: 50-60 chars (~395px / 580px)

Description Length52 chars

Recommended: 120-160 chars

Issues (1)

• Very thin content (10 words). Search engines need substantial content for ranking.

6 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

33 URLs

33 sub-sitemaps

robots.txt

207 rules

Sitemap reference found

Local SEO

Local Search Readiness

20/100

Needs Work

5 15

Sponsored

AI & LLM Readiness

F22/100

Bot Access

11/25

Machine Read.

1/25

Schema Data

3/25

Citation

7/25

AI Bot Access

4/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

Text ratio:5%

Words:3,883

Token eff.:Poor Structure

Structured Data

1 JSON-LD

Organization×1.1

sameAs entity links

Citation Readiness

Opening Summary

Descriptive Headings

Canonical URL

Open Graph3/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (12)

AI readiness recommendation preview...

Upgrade to view recommendations

Sponsored

Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

75/100

Passed

Critical

Warnings

Images & Alt Text

15/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

20/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

15/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

12/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

9/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

4/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

2 recommendations

•Accessibility recommendation preview...

Upgrade to view recommendations

Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

42/100

592 mg

CO₂e / view

5.7 MB

Page Weight

Cleaner Than

New Visitor

677 mg

Returning (cached)

338 mg

Annual (10K/mo)

71.1 kg

Emission Segments

Data Center

29 mg

Network

174 mg

Device

389 mg

Resource Breakdown

JavaScript

248.6 KB

Images

5.1 MB

CSS

105.1 KB

Fonts

172.7 KB

HTML

54.5 KB

Other

9.9 KB

Green Hosting Verified

dogado

GWF Verified

7 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

31%Critical

Interactive

HTTPS

No WAF

51d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

15.03.2026

Valid Until

13.06.2026

Subject Alternative Names (1)

www.freitag.de

SHA-256 Fingerprint

C7:82:61:CB:5D:4F:BC:46:67:5F:5C:31:16:C9:E7:01:B7:2A:A6:F5...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-origin

age

cache-control

🟡 0s(max-age=0, s-maxage=600, must-revalidate)

content-encoding

⚡ Brotli(br)

content-language

content-type

text/html;charset=utf-8

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

MX Records (1)

freitag-de.mail.protection.outlook.com

Domain Information

freitag.de

Last Updated

18.06.2021

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

Data Protection Officer mentioned

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

71/100

Mobile Friendly4 breakpoints

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

Viewport

width=device-width, initial-scale=1.0

1 recommendation

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Ambient SemiBold + TheAntiquaF Regular

WCAG AAA

80/100

Readability

/30

23/30

16px · LH 1.50

Hierarchy

/20

17/20

2.5x ratio · ✓ H1→H6

WCAG

/25

24/25

12.6:1 min contrast

Performance

/25

16/25

System fonts

Heading Font

Ambient SemiBold

Sans40px

Body Font

TheAntiquaF Regular

Sans16px

Contrast Ratio

12.6:1

WCAG AAA (≥7:1)

Reading Comfort

~38 CPL

Narrow lines

40px

32px

24px

16px

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

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

❌ Very complex text: Flesch score 24/100. Consider shorter sentences and simpler words.

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 12.6:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 2.5x larger than body text.

Buy on MyFontsFluid Type (rem)Flesch 24

Color Palette

8 unique colors

Light

#ffffff

Background· 39.3%

#fcddcb

Accent· 22.5%

#fbec54

Accent· 8%

#080913

Primary· 7.5%

#ac876e

Secondary· 6.6%

#835140

Secondary· 6%

#dbc7b2

Secondary· 5.3%

#3c1b15

Secondary· 4.9%

Business & Marketing Stack

3 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Microsoft ClarityFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

15 Resources

Scripts

Styles

Async

Defer

Top Script Sources

freitag.de(2)scripts.clarity.ms(1)clarity.ms(1)googletagmanager.com(1)metrik.freitag.de(1)

Website Identity

der Freitag

Organization

Die Wochenzeitung der Freitag wurde 1990 gegründet. Mit dem Untertitel "Die Ost-West-Wochenzeitung" begleitete der Freitag als einziges Medium mit diesem Schwerpunkt die prägenden Jahre des wiedervereinigten Deutschlands. Zu den früheren Herausgebern gehörten u.a. Günter Gaus und Christoph Hein. 200

www.freitag.de/

Hegelplatz 1, Berlin

10117, Berlin, Berlin

Location detected: 🇩🇪 Germanyvia tld

📧 Microsoft 365deEst. 1990

Social Profiles

Facebook Instagram YouTube Bluesky

Sponsored

Last analyzed: 23 Apr 2026 at 04:49

Historical Analysis & Change Tracking