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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hu-berlin.de

https://hu-berlin.de· First analyzed 12 Feb 2026· Updated 12 Feb 2026

Export

hu-berlin.de

Mobile

Sponsored

Hosting Provider

Humboldt-Universitaet zu Berlin

IP Address

141.20.4.180

Server Location

🇩🇪 Berlin, Germany

ASN

AS680

Organization

Humboldt-Universitaet zu Berlin

Server

Apache

Nameservers

hpcom.rz.hu-berlin.de.buffy.cms.hu-berlin.de.suncom.rz.hu-berlin.de.ns.tu-berlin.de.+1 more

Performance

Page Speed

886 KB

20 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Tailwind CSS

CMS

TYPO3

Infrastructure

Hosting

Humboldt-Universitaet zu Berlin

Progressive Web App

Web ManifestApple Touch Icon

Technology Stack

4 Technologies Detected

CSS Frameworks

Icon Libraries

Analytics

Web Servers

SEO Analysis

B76/100

hu-berlin.dehu-berlin.de

Humboldt-Universität zu Berlin

Wir forschen, lehren und arbeiten für die und mit der Gesellschaft. Frei. Unabhängig. Verantwortungsvoll. Mutig und engagiert. Vielfältig und offen. Geschich...

Description truncated.

Title Length30 chars

Recommended: 50-60 chars

Description Length251 chars

Recommended: 120-160 chars

Issues (0)

3 issues found

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Crawlability

Sitemap

Type: index

27 URLs

robots.txt

3 rules

Sitemap reference found

Sponsored

Security Score

61%Fair

Interactive

HTTPS

No WAF

285d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

25.11.2025

Valid Until

25.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

www.hu-berlin.de

SHA-256 Fingerprint

A6:29:F1:0F:82:F7:A8:BD:74:19:43:3F:2B:0F:49:DA:83:18:D6:A4...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

age

84943

content-encoding

📦 Gzip(gzip)

content-language

de-DE

content-length

22734

content-type

text/html; charset=utf-8

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (2)

ir1.cms.hu-berlin.de

ir2.cms.hu-berlin.de

Domain Information

hu-berlin.de

Last Updated

15.05.2018

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

ff-scala + hub-ddin-exp

73/100

Readability

/30

32/40

16px · LH 1.38

Hierarchy

/20

18/25

3.38x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

ff-scala

Sans54px

Body Font

hub-ddin-exp

Sans16px

Contrast Ratio

Reading Comfort

~37 CPL

Needs attention

54px

28px

22px

16px

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

✅ Strong hierarchy: Headlines are 3.4x larger than body text.

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

✅ Smart font loading: Using font-display: swap prevents invisible text during load.

⚠️ Cramped layout: 24 elements lack adequate spacing.

✅ Clean layout: Consistent left alignment throughout.

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Matomo (Piwik)Mid-Market

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

8 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(2)www3.hu-berlin.de(1)

Website Identity

Facebook Instagram YouTube Bluesky

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Last analyzed: 12 Feb 2026 at 22:36

Historical Analysis & Change Tracking