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

dfb.de

https://dfb.de· First analyzed 18 Feb 2026· Updated 18 Feb 2026

Export

dfb.de

Sponsored

Hosting Provider

Host Europe

hosteurope.de

IP Address

46.163.95.211

Server Location

🇩🇪 Cologne, Germany

ASN

AS61157

Organization

Hosteurope GmbH

CDN

Nameservers

ns-831.awsdns-39.net.ns-1256.awsdns-29.org.ns-1561.awsdns-03.co.uk.ns-29.awsdns-03.com.

Performance

Page Speed

1.8 MB

103 requests

Image Optimization

Lazy LoadCloudinary

0–49

50–89

90–100

Architecture Stack

Hybrid

⚡ SSG

Frontend

Framework

Gatsby

Infrastructure

Hosting

Host Europe

CDN

Progressive Web App

Web ManifestApple Touch Icon

Technology Stack

8 Technologies Detected

Advertising

Google Ads LinkedIn Ads TikTok Pixel

Analytics

Facebook Pixel Matomo

Meta Frameworks

Gatsby

CSS Frameworks

Tailwind CSS

Payments

Klarna

SEO Analysis

C68/100

dfb.dedfb.de

Deutscher Fußball-Bund: Offizielle Webseite des DFB

Hier findest du alle offiziellen Infos zum DFB und der Fußball-Nationalmannschaft ✔️ Tickets, News, Shop & mehr. Jetzt entdecken!

Title Length51 chars

Recommended: 50-60 chars

Description Length129 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag - every page should have one H1
• Many images missing alt text (81/149)

3 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

3 URLs

robots.txt

2 rules

Allows all crawlers

Sponsored

Security Score

83%Very Good

Static / Informational

HTTPS

No WAF

151d

Certificate Details

Type

Domain Validated (DV)

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

19.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

www.dfb.de

SHA-256 Fingerprint

85:BC:7A:90:FD:1E:0F:32:DF:99:31:51:88:91:3E:67:66:1F:DE:CD...

Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-origin

cache-control

🟡 300s(max-age=300)

content-encoding

⚡ Brotli(br)

content-type

text/html

date

Wed, 18 Feb 2026 06:07:46 GMT

etag

W/"4ce13-64b08fae21845"

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

dfb-de.mail.protection.outlook.com

Domain Information

dfb.de

Last Updated

02.07.2025

DNSSEC

Not Enabled

Privacy & Compliance

Usercentrics

Cookie Consent Banner

Usercentrics

GDPR Indicators

Cookie consent banner detected

CMP: Usercentrics

Data Protection Officer mentioned

Typography & Readability

DFB Sans Pro

71/100

Readability

/30

40/40

16px · LH 1.75

Hierarchy

/20

8/25

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

DFB Sans Pro

Sans

Body Font

DFB Sans Pro

Sans16px

Contrast Ratio

Reading Comfort

Single Font Family

left aligned

48px

36px

20px

16px

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

✅ Optimal line spacing: 1.75 ratio ensures comfortable reading.

✅ Good performance: Using 1 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

5 Tools Detected

Enterprise

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

TikTok PixelMid-Market

Google AdsEnterprise

Ad platforms and retargeting pixels

Privacy & Cookies

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

21 Resources

Scripts

Styles

Async

Defer

Top Script Sources

web.eu1.cmp.usercentrics.eu(7)local(5)analytics.tiktok.com(3)googleadservices.com(1)cdns.eu1.gigya.com(1)

Website Identity

Facebook X (Twitter)Instagram LinkedIn TikTok

Sponsored

Last analyzed: 18 Feb 2026 at 06:08

Historical Analysis & Change Tracking