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.

Back to Search

uni.lu

https://uni.lu· First analyzed 18 Feb 2026· Updated 18 Feb 2026

Export

uni.lu

Sponsored

Hosting Provider

Fondation RESTENA

IP Address

158.64.79.55

Server Location

🇱🇺 Luxembourg, Luxembourg

ASN

AS2602

Organization

Fondation RESTENA

Server

CloudFront

CDN

CloudFront

Nameservers

nspub1.dns.lu.nspub2.dns.lu.nspub-eu.dns.lu.

Performance

Page Speed

7 MB

133 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Headless

⚙️ SSR

Decoupled

Frontend

Framework

React

Styling

Tailwind CSS

API

Data Source

Headless CMS

Strapi

Infrastructure

Hosting

Fondation RESTENA

CDN

CloudFront

Detected API Sources

https://player.vimeo.com/api/p...

Technology Stack

12 Technologies Detected

Libraries

jQueryv3.7.0

Lodash Moment.js

Plugins

Menu Icons Event Tickets

Analytics

Frameworks

CSS Frameworks

Icon Libraries

CDN

SEO Analysis

A82/100

uni.luuni.lu

Home - University of Luxembourg

Home page of the University of Luxembourg, an international research university with a multilingual and interdisciplinary character.

Title Length31 chars

Recommended: 50-60 chars

Description Length132 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (31/56)

1 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

27 URLs

robots.txt

Sponsored

Security Score

81%Very Good

Interactive

HTTPS

No WAF

245d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

21.10.2025

Valid Until

21.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (4)

www.uni.luwwwde.uni.luwwwen.uni.luwwwfr.uni.lu

SHA-256 Fingerprint

3B:C5:74:0D:E5:DC:78:30:6A:C1:FE:D7:A9:F6:0E:08:E0:F0:1F:78...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

content-security-policy

default-src https: data: wss: 'unsafe-eval' 'unsafe-inline'

content-type

text/html; charset=UTF-8

date

Wed, 18 Feb 2026 06:38:34 GMT

link

<https://www.uni.lu/en/wp-json/>; rel="https://api.w.org/", ...

referrer-policy

no-referrer-when-downgrade

server

CloudFront

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

uni-lu.mail.protection.outlook.com

Domain Information

uni.lu

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Data Protection Officer mentioned

Legitimate interest basis mentioned

Typography & Readability

Barlow

88/100

Readability

/30

40/40

18px · LH 1.50

Hierarchy

/20

25/25

2.67x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Barlow

Sans48px

Body Font

Barlow

Sans18px

Contrast Ratio

Reading Comfort

~37 CPL

Needs attention

48px

32px

16px

18px

✅ Excellent readability: 18px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.7x 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.

⚠️ Cramped layout: 21 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

Matomo (Piwik)Mid-Market

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

CookiebotMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

uni.lu(14)youtube.com(2)consent.cookiebot.com(2)player.vimeo.com(1)cdn.matomo.cloud(1)

Website Identity

Facebook Instagram Threads Bluesky

Sponsored

Last analyzed: 18 Feb 2026 at 06:38

Historical Analysis & Change Tracking