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

fr.de

https://fr.de· First analyzed 14 Feb 2026· Updated 14 Feb 2026

Export

fr.de

Mobile

Sponsored

Hosting Provider

Ippen Digital GmbH & Co. KG

IP Address

91.234.30.212

Server Location

🇩🇪 Munich, Germany

ASN

AS34788

Organization

Ippen Digital GmbH & Co. KG

Server

Nginx

CDN

Nameservers

ns28.domaincontrol.com.ns27.domaincontrol.com.

Performance

Page Speed

310 KB

73 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Headless

⚙️ SSR

Decoupled

API

Data Source

Headless CMS

Strapi

Infrastructure

Hosting

Ippen Digital GmbH & Co. KG

CDN

Progressive Web App

Web ManifestApple Touch Icon

Detected API Sources

https://functions.adnami.io/ap...

Technology Stack

6 Technologies Detected

Analytics

CSS Frameworks

Tag Managers

Advertising

Web Servers

SEO Analysis

A82/100

fr.defr.de

FR.de | News aus Politik, Wirtschaft, Sport, Frankfurt, Hessen und ...

Aktuelle Nachrichten aus Frankfurt und der Welt – von Politik über Wirtschaft zu Verbraucher-Tipps und Eintracht Frankfurt.

Title truncated.

Title Length75 chars

Recommended: 50-60 chars

Description Length123 chars

Recommended: 120-160 chars

Issues (0)

2 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

34 URLs

robots.txt

270 rules

Sitemap reference found

Sponsored

Security Score

21%Critical

Interactive

HTTPS

No WAF

66d

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

21.01.2026

Valid Until

21.04.2026

Subject Alternative Names (13)

abo.fr.debeta.fr.id-setup.declicks.mitteilungen.fr.declicks.service.fr.dee-kiosk.fr-online.defr-online.defr.delogin.fr-online.de+5 more

SHA-256 Fingerprint

90:2E:62:E2:8A:01:6A:D0:15:D3:20:0B:BB:BF:08:03:87:D7:F1:49...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

age

736

cache-control

🔴 No Cache(public, max-age=180, no-cache, no-store, must-revalidate)

content-encoding

📦 Gzip(gzip)

content-language

en-US

content-type

text/html;charset=utf-8

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

fr-de.mail.protection.outlook.com

Domain Information

fr.de

Last Updated

18.01.2021

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 Neue

69/100

Readability

/30

24/40

15px · LH 1.33

Hierarchy

/20

15/25

0.93x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

Helvetica Neue

Sans14px

Body Font

Helvetica Neue

Sans15px

Contrast Ratio

Reading Comfort

Single Font Family

left aligned

14px

31px

15px

Perfect Fifth

Scale

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

⚠️ Weak hierarchy: Headlines should be at least 2x body size for clear visual structure.

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

✅ 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.

Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

OutbrainMid-Market

Ad platforms and retargeting pixels

Privacy & Cookies

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

25 Resources

Scripts

Styles

Async

Defer

Top Script Sources

idcdn.de(6)cdntrf.com(3)data-f1e447fbcf.fr.de(2)cl.k5a.io(2)cdn.opencmp.net(2)

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Last analyzed: 14 Feb 2026 at 01:50

Historical Analysis & Change Tracking