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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tilburguniversity.edu

https://tilburguniversity.edu· First analyzed 20 Feb 2026· Updated 20 Feb 2026

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Hosting Provider

Universiteit van Tilburg

IP Address

137.56.209.21

Server Location

🇳🇱 Amsterdam, The Netherlands

ASN

AS1103

Organization

Universiteit van Tilburg

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns1.uvt.nl.ns2.uvt.nl.ns1.surfnet.nl.ns1.zurich.surf.net.

Performance

Page Speed

816 KB

43 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Drupal

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

5 Technologies Detected

Libraries

Other

CSS Frameworks

Tag Managers

CDN

SEO Analysis

C64/100

tilburguniversity.edutilburguniversity.edu

Tilburg University: dedicated to society since 1927 | Tilburg Unive...

No description available for this page.

Title truncated.

Title Length72 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

• Missing meta description - important for click-through rates

4 issues found

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Crawlability

Sitemap

robots.txt

64 rules

Sitemap reference found

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Security Score

46%Poor

Interactive

HTTPS

WAF

81d

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

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

12.05.2025

Valid Until

12.05.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

www.tilburguniversity.edu

SHA-256 Fingerprint

2F:4D:4E:0E:BE:DE:FB:FC:83:75:97:E8:F4:6B:D4:66:61:B6:D2:67...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🔵 1 Days(max-age=86400, public, private)

cf-cache-status

DYNAMIC

cf-ray🇩🇪 Frankfurt

9d0c51bb7b8d9f4b-FRA

content-encoding

⚡ Brotli(br)

content-language

content-type

text/html; charset=UTF-8

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

100

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

tilburguniversity-edu.mail.protection.outlook.com

Domain Information

tilburguniversity.edu

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Data Protection Officer mentioned

Typography & Readability

scala-sans + lato

63/100

Readability

/30

40/40

17px · LH 1.50

Hierarchy

/20

20/25

1.64x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

scala-sans

Sans28px

Body Font

lato

Sans17px

Contrast Ratio

Reading Comfort

~34 CPL

Needs attention

28px

21px

17px

✅ Excellent readability: 17px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Good hierarchy: Clear distinction between headlines and body text.

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

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

⚠️ Risky: Text appears on background images without overlay protection.

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

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Scripts & Styles

14 Resources

Scripts

Styles

Async

Defer

Top Script Sources

cse.google.com(3)local(3)data.tilburguniversity.edu(2)google.com(1)cdnjs.cloudflare.com(1)

Website Identity

Facebook Instagram YouTube

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Last analyzed: 20 Feb 2026 at 07:34

Historical Analysis & Change Tracking