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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uni-frankfurt.de

https://uni-frankfurt.de· First analyzed 13 Feb 2026· Updated 13 Feb 2026

Export

uni-frankfurt.de

Mobile

Sponsored

Hosting Provider

UNIFFM

IP Address

141.2.37.198

Server Location

🇩🇪 Darmstadt, Germany

ASN

AS20633

CDN

Fastly

Nameservers

chaplin.rz.uni-frankfurt.de.dns-2.dfn.de.wattdenn.rz.uni-frankfurt.de.

Performance

Page Speed

1.6 MB

46 requests

Image Optimization

Lazy LoadResponsiveVercel Image Optimization

0–49

50–89

90–100

Architecture Stack

Hybrid

🔀 Hybrid

Frontend

Framework

Next.js

Styling

Tailwind CSS

Infrastructure

Hosting

UNIFFM

CDN

Fastly

Technology Stack

3 Technologies Detected

Meta Frameworks

Next.js

CSS Frameworks

Tailwind CSS

Analytics

Matomo

SEO Analysis

A+96/100

uni-frankfurt.deuni-frankfurt.de

Goethe University Frankfurt – Research, Study, Transfer

Discover everything about Goethe University Frankfurt: course offerings, research, campus life, and services for students and researchers.

Title Length55 chars

Recommended: 50-60 chars

Description Length138 chars

Recommended: 120-160 chars

Issues (0)

1 issues found

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Crawlability

Sitemap

Type: index

4 URLs

robots.txt

57 rules

Sitemap reference found

Sponsored

Security Score

76%Good

Static / Informational

HTTPS

No WAF

285d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

26.11.2025

Valid Until

26.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (3)

uni-frankfurt.deassets.uni-frankfurt.dewww.uni-frankfurt.de

SHA-256 Fingerprint

C0:6B:92:6F:B0:58:6F:12:C7:69:76:23:EF:4A:39:8B:52:F0:70:E7...

Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

cache-control

🔴 No Cache(private, no-cache, no-store, max-age=0, must-revalidate)

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=utf-8

date

Fri, 13 Feb 2026 11:22:21 GMT

link

<https://www.uni-frankfurt.de/en>; rel="alternate"; hreflang...

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (2)

mx2.uni-frankfurt.de

mx1.uni-frankfurt.de

Domain Information

uni-frankfurt.de

Last Updated

04.07.2017

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Typography & Readability

Satoshi + Open Sans

72/100

Readability

/30

20/40

12px · LH 1.50

Hierarchy

/20

25/25

4x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

17/20

System fonts

Heading Font

Satoshi

Sans48px

Body Font

Open Sans

Sans12px

Contrast Ratio

Reading Comfort

~42 CPL

Needs attention

48px

32px

16px

12px

❌ Critical: 12px body text is too small. Increase to at least 14px.

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 4.0x larger than body text.

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

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

⚠️ Cramped layout: 18 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

20 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(17)

Website Identity

Facebook Instagram Bluesky

Sponsored

Last analyzed: 13 Feb 2026 at 11:22

Historical Analysis & Change Tracking