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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univ-lille.fr

https://univ-lille.fr· First analyzed 19 Feb 2026· Updated 19 Feb 2026

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univ-lille.fr

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Hosting Provider

U Lille

IP Address

194.254.129.23

Server Location

🇫🇷 Amiens, France

ASN

AS2200

Organization

U Lille

Server

Apache

Nameservers

ns1.univ-lille.fr.ns2.univ-lille.fr.

Performance

Page Speed

1.5 MB

58 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

TYPO3

Technology Stack

5 Technologies Detected

Libraries

CSS Frameworks

Icon Libraries

Analytics

Web Servers

SEO Analysis

D50/100

univ-lille.fruniv-lille.fr

Accueil - Université de Lille

No description available for this page.

Title Length29 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 (20/27)

6 issues found

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Security Score

76%Good

Interactive

HTTPS

No WAF

189d

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/1.1

Valid From

28.08.2025

Valid Until

28.08.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.univ-lille.fruniv-lille.fr

SHA-256 Fingerprint

96:F2:79:B6:61:D0:14:0E:AC:DB:53:17:26:D8:1D:E6:55:49:9B:F9...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🟡 21 Hours(max-age=79159)

connection

Keep-Alive

content-encoding

📦 Gzip(gzip)

content-language

fr-FR

content-security-policy

frame-ancestors 'self' https://*.univ-lille.fr;

content-type

text/html; charset=utf-8

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

mx1.univ-lille.fr

Domain Information

univ-lille.fr

Domain Age

20 years

Created

03.02.2006

Expires

03.02.2027

Last Updated

03.02.2026

Registrar

GIP RENATER

DNSSEC

Not Enabled

Typography & Readability

Source Sans 3 + system-ui

46/100

Readability

/30

32/40

32px · LH 1.25

Hierarchy

/20

11/25

0.5x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Source Sans 3

Sans16px

Body Font

system-ui

Sans32px

Contrast Ratio

Reading Comfort

~35 CPL

Needs attention

16px

45px

64px

32px

✅ Excellent readability: 32px body text is ideal for all devices.

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

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

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

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

⚠️ Cramped layout: 16 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Matomo (Piwik)Mid-Market

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

15 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(5)univ-lille.fr(2)piwik.univ-lille.fr(1)

Website Identity

Facebook X (Twitter)Instagram YouTube TikTok Bluesky

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Last analyzed: 19 Feb 2026 at 18:00

Historical Analysis & Change Tracking