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-jena.de

https://uni-jena.de· First analyzed 15 Feb 2026· Updated 15 Feb 2026

Export

uni-jena.de

Mobile

Sponsored

Hosting Provider

Friedrich Schiller Universitaet Jena

IP Address

141.35.105.79

Server Location

🇩🇪 Jena, Germany

ASN

AS680

Organization

Friedrich Schiller Universitaet Jena

CDN

Nameservers

dns-extern-03.uni-jena.de.dns-3.dfn.de.dns-extern-04.uni-jena.de.dns-extern-02.uni-jena.de.+1 more

Performance

Page Speed

764 KB

41 requests

Image Optimization

Lazy LoadWebPAVIFResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Friedrich Schiller Universitaet Jena

CDN

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

1 Technologies Detected

CSS Frameworks

Tailwind CSS

SEO Analysis

A88/100

uni-jena.deuni-jena.de

Friedrich-Schiller-Universität Jena

Die Universität Jena verbindet: Menschen und Ideen, Wissenschaft und Wirtschaft, Hochschulen und außeruniversitäre Forschungseinrichtungen.

Title Length35 chars

Recommended: 50-60 chars

Description Length139 chars

Recommended: 120-160 chars

Issues (0)

1 issues found

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Crawlability

Sitemap

Type: standard

robots.txt

23 rules

Sitemap reference found

Sponsored

Security Score

76%Good

Interactive

HTTPS

No WAF

193d

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+H3

Valid From

27.08.2025

Valid Until

27.08.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

www.uni-jena.deuni-jena.de

SHA-256 Fingerprint

E6:C9:39:97:D0:62:EF:58:95:4A:83:B3:3F:41:29:C7:45:C1:82:92...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400, h3-29=":443"; ma=86400, h3-27=":443; ma...

content-encoding

📦 Gzip(gzip)

content-security-policy

base-uri https://www.uni-jena.de; frame-ancestors *.uni-jena...

content-type

text/html; charset=utf-8

date

Sun, 15 Feb 2026 09:11:16 GMT

permissions-policy

camera=(), microphone=(), midi=(), usb=(), geolocation=(), g...

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (3)

b2391.mx.srv.dfn.de

c2391.mx.srv.dfn.de

a2391.mx.srv.dfn.de

Domain Information

uni-jena.de

Last Updated

04.05.2020

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Data Protection Officer mentioned

Typography & Readability

Roboto Flex

60/100

Readability

/30

12/40

12px · LH 1.33

Hierarchy

/20

25/25

2.33x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Roboto Flex

Sans28px

Body Font

Roboto Flex

Sans12px

Contrast Ratio

Reading Comfort

~37 CPL

Needs attention

28px

25px

22px

12px

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

✅ Strong hierarchy: Headlines are 2.3x larger than body text.

✅ 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.

⚠️ Cramped layout: 57 elements lack adequate spacing.

Buy on MyFontsVariable Fonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Matomo (Piwik)Mid-Market

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

9 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(4)stats.uni-jena.de(1)

Website Identity

Facebook Instagram YouTube TikTok Mastodon Bluesky

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Last analyzed: 15 Feb 2026 at 09:11

Historical Analysis & Change Tracking