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-mainz.de

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

Export

uni-mainz.de

Mobile

Sponsored

Hosting Provider

Johannes Gutenberg-Universitaet Mainz

IP Address

134.93.178.31

Server Location

🇩🇪 Mainz, Germany

ASN

AS2857

Server

Apache

Nameservers

ns-extern.zdv.uni-mainz.de.xlink1.xlink.net.

Performance

Page Speed

2.7 MB

140 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

React

CMS

WordPressv6.7.2

Infrastructure

Hosting

Johannes Gutenberg-Universitaet Mainz

Technology Stack

19 Technologies Detected

Plugins

Gutenberg

Jgu Fis Jgu Idm Jgu Jogustine Jgu Base Jgu Navigation Structure Jgu Tools Jgu Events Calendar Jgu Newsroom Jgu Study Finder

Libraries

Frameworks

CSS Frameworks

Web Servers

SEO Analysis

D50/100

uni-mainz.deuni-mainz.de

Johannes Gutenberg-Universität Mainz

No description available for this page.

Title Length36 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

• Missing meta description - important for click-through rates
• Many images missing alt text (18/31)

5 issues found

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Crawlability

Sitemap

Type: standard

robots.txt

692 rules

Sitemap reference found

Sponsored

Security Score

66%Fair

Interactive

HTTPS

No WAF

43d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

29.12.2025

Valid Until

29.03.2026

Subject Alternative Names (2)

startseite.uni-mainz.dewww.uni-mainz.de

SHA-256 Fingerprint

AB:2A:15:F8:BE:D4:C7:BD:77:59:FD:68:21:86:25:E2:57:D0:F9:DC...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

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HTTP Headers

Developer Console

cache-control

🟡 0s(max-age=0)

content-encoding

📦 Gzip(gzip)

content-length

22507

content-security-policy-report-only

default-src 'self'; connect-src https:; font-src 'self' data...

content-type

text/html; charset=UTF-8

date

Fri, 13 Feb 2026 23:57:54 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (3)

mailgate-1.zdv.uni-mainz.de

mailgate-3.zdv.uni-mainz.de

mailgate-2.zdv.uni-mainz.de

Domain Information

uni-mainz.de

Last Updated

13.08.2007

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Data Protection Officer mentioned

Typography & Readability

NotoSans

56/100

Readability

/30

24/40

14px · LH 1.29

Hierarchy

/20

11/25

1.14x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

NotoSans

Sans16px

Body Font

NotoSans

Sans14px

Contrast Ratio

Reading Comfort

~34 CPL

Needs attention

16px

35px

14px

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

⚠️ Weak hierarchy: Headlines should be at least 2x body size for clear visual structure.

✅ Good performance: Using 1 font families keeps load times fast.

✅ Consistent design: Single font family with weight variations is a modern best practice.

⚠️ Cramped layout: 12 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

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

uni-mainz.de(17)cms.zdv.uni-mainz.de(3)

Website Identity

Facebook Instagram TikTok Bluesky

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Last analyzed: 13 Feb 2026 at 23:58

Historical Analysis & Change Tracking