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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aerzteblatt.de

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

Export

aerzteblatt.de

Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

35.157.125.147

Server Location

🇩🇪 Frankfurt am Main, Germany

ASN

AS16509

Organization

AWS EC2 (eu-central-1)

CDN

CloudFront

Nameservers

ns20.domaincontrol.com.ns19.domaincontrol.com.

Performance

Page Speed

1.4 MB

137 requests

Image Optimization

Lazy LoadResponsiveVercel Image Optimization

0–49

50–89

90–100

Architecture Stack

Hybrid

⚙️ SSR

Frontend

Framework

Next.js

Styling

Tailwind CSS

Infrastructure

Hosting

Amazon Web Services (AWS)

CDN

CloudFront

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

5 Technologies Detected

Meta Frameworks

Other

CSS Frameworks

Analytics

Tag Managers

SEO Analysis

B76/100

aerzteblatt.deaerzteblatt.de

Deutsches Ärzteblatt: Aktuelles aus Gesundheitspolitik und Medizin

Aktuelles aus der Gesundheitspolitik, neueste Studien aus der medizinischen Forschung, Nachrichten aus der ärztlichen Berufspolitik und den Hochschulen

Title Length66 chars

Recommended: 50-60 chars

Description Length151 chars

Recommended: 120-160 chars

Issues (0)

3 issues found

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Crawlability

Sitemap

Type: standard

robots.txt

146 rules

Sitemap reference found

Sponsored

Security Score

76%Good

Interactive

HTTPS

WAF

249d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

20.09.2025

Valid Until

21.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.aerzteblatt.deaerzteblatt.de

SHA-256 Fingerprint

9D:92:47:EB:E3:54:1D:C5:53:BA:2C:31:34:A7:01:52:42:E0:09:AD...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🔴 No Cache(max-age=300, stale-while-revalidate=60, stale-if-error=3600,...)

content-encoding

⚡ Brotli(br)

content-security-policy

default-src 'self' https:; script-src 'self' 'unsafe-inline'...

content-type

text/html; charset=utf-8

date

Sat, 14 Feb 2026 23:30:24 GMT

etag

W/"6vua7il1s79oyk"

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (3)

nsp-mail-gw.westeurope.cloudapp.azure.com

dst.aerzteverlag-it.de

mailgw.aerzteverlag.de

Domain Information

aerzteblatt.de

Last Updated

12.01.2021

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Data Protection Officer mentioned

Typography & Readability

Asap Condensed

82/100

Readability

/30

32/40

15px · LH 1.43

Hierarchy

/20

20/25

1.71x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

Asap Condensed

Sans26px

Body Font

Asap Condensed

Sans15px

Contrast Ratio

Reading Comfort

~42 CPL

Needs attention

26px

17px

26px

15px

Minor Second

Scale

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

✅ Optimal line spacing: 1.43 ratio ensures comfortable reading.

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

✅ 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.

Buy on MyFonts

Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

CookiebotMid-Market

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

21 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(15)cdn.privacy-mgmt.com(2)data-df5a2bcc30.aerzteblatt.de(2)cp.aerzteblatt.de(1)

Website Identity

aerzteblatt.de

Social Profiles

Facebook X (Twitter)Instagram LinkedIn

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Last analyzed: 14 Feb 2026 at 23:30

Historical Analysis & Change Tracking