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

dwd.de

https://dwd.de· First analyzed 16 Feb 2026· Updated 16 Feb 2026

Export

dwd.de

Sponsored

Hosting Provider

Deutscher Wetterdienst

IP Address

141.38.3.62

Server Location

🇩🇪 Offenbach, Germany

ASN

AS41289

Organization

Deutscher Wetterdienst

Server

Apache

Nameservers

dnsisp2.dwd.eu.deneb.dfn.de.dnsisp1.dwd.de.dnsisp2.dwd.de.+1 more

Performance

Page Speed

1.1 MB

55 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Deutscher Wetterdienst

Technology Stack

6 Technologies Detected

Libraries

Meta Frameworks

CSS Frameworks

Icon Libraries

Web Servers

SEO Analysis

B76/100

dwd.dedwd.de

Wetter und Klima - Deutscher Wetterdienst - Startseite

Wetter und Klima aus einer Hand: Wetterwarnungen, Wetter, Klima, Biowetter, Agrarwetter, Flugwetter, Seewetter, Klimadaten, Klimakarten, Klimaservices

Title Length57 chars

Recommended: 50-60 chars

Description Length151 chars

Recommended: 120-160 chars

Issues (0)

3 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

2 URLs

robots.txt

14 rules

Sitemap reference found

Allows all crawlers

Sponsored

Security Score

81%Very Good

Interactive

HTTPS

No WAF

262d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

05.11.2025

Valid Until

05.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (20)

www.dwd.dedas-basisdienst.dedwd.degcos.dwd.degpcc.dwd.deidea-s4s.euisabel.dwd.deklima.dwd.de+12 more

SHA-256 Fingerprint

FF:2C:B8:89:F1:F5:C6:7A:0D:52:58:DA:71:C2:C0:A6:A6:E2:F7:63...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-methods

POST, GET

access-control-allow-origin

cache-control

🟡 60s(max-age=60)

content-encoding

📦 Gzip(gzip)

content-language

content-security-policy

default-src 'self' *.dwd.de *.readspeaker.com *.twitter.com ...

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (4)

ofcsgdop.dwd.de

zbcsgdop.dwd.de

ofcsgdbm.dwd.de

zbcsgdbm.dwd.de

Domain Information

dwd.de

Last Updated

25.09.2024

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

DejaVuSans-ExtraLight + DejaVuSansBook

68/100

Readability

/30

32/40

14px · LH 1.50

Hierarchy

/20

13/25

1.57x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

DejaVuSans-ExtraLight

Sans22px

Body Font

DejaVuSansBook

Sans14px

Contrast Ratio

Reading Comfort

~41 CPL

Needs attention

22px

14px

Minor Second

Scale

⚠️ Small text: 14px may be hard to read on mobile. Consider 16px+.

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Good hierarchy: Clear distinction between headlines and body text.

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

✅ Protected text on images: Using gradient for readability.

⚠️ Cramped layout: 23 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

16 Resources

Scripts

Styles

Async

Defer

Top Script Sources

SiteGlobals(6)

Website Identity

Facebook X (Twitter)Instagram LinkedIn YouTube Bluesky

Sponsored

Last analyzed: 16 Feb 2026 at 13:24

Historical Analysis & Change Tracking