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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u-paris.fr

https://u-paris.fr· First analyzed 20 Feb 2026· Updated 20 Feb 2026

Export

u-paris.fr

Sponsored

Hosting Provider

Universite Paris

IP Address

195.220.128.193

Server Location

🇫🇷 Paris, France

ASN

AS2200

Organization

Universite Paris

Server

Apache

Nameservers

delta.univ-paris5.fr.potemkin.univ-paris7.fr.korolev.univ-paris7.fr.

Performance

Page Speed

8 MB

77 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPressv5.2.23

cms

Diviv3.22.1

by Elegant Themes

View Theme

Technology Stack

13 Technologies Detected

Plugins

Divi Social Plus

Nextend Smart Slider3 Pro

Divi Team Members

All In One Event Calendar

Meta Frameworks

Libraries

Other

CSS Frameworks

Icon Libraries

Analytics

Web Servers

Customer Support

SEO Analysis

D52/100

u-paris.fru-paris.fr

Université Paris Cité | Bienvenue à Université Paris Cité

No description available for this page.

Title Length57 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 (37/55)

5 issues found

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Crawlability

Sitemap

robots.txt

62 rules

Sponsored

Security Score

36%Critical

Interactive

HTTPS

No WAF

272d

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

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

20.11.2025

Valid Until

20.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.u-paris.fru-paris.fr

SHA-256 Fingerprint

3A:D7:F6:2D:60:EF:38:21:D0:29:C5:92:E5:C9:48:2E:EF:3D:2E:45...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-store, no-cache, must-revalidate)

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=UTF-8

date

Fri, 20 Feb 2026 12:56:53 GMT

expires

Thu, 19 Nov 1981 08:52:00 GMT

link

<https://u-paris.fr/wp-json/>; rel="https://api.w.org/", <ht...

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (4)

mx04.cloud.vadesecure.com

mx02.cloud.vadesecure.com

mx01.cloud.vadesecure.com

mx03.cloud.vadesecure.com

Domain Information

u-paris.fr

Domain Age

9y 9m

Created

12.05.2016

Expires

20.05.2027

Last Updated

23.12.2025

Registrar

unyc

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Cookie consent banner detected

Data Protection Officer mentioned

Typography & Readability

Darby Sans Web

30/100

Readability

/30

24/40

14px · LH 1.20

Hierarchy

/20

8/25

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Darby Sans Web

Sans

Body Font

Darby Sans Web

Sans14px

Contrast Ratio

Reading Comfort

~49 CPL

Optimal (45–75)

34px

21px

14px

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

✅ 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.

✅ Optimal line length: ~48 characters per line is comfortable to read.

⚠️ Cramped layout: 39 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

28 Resources

Scripts

Styles

Async

Defer

Top Script Sources

u-paris.fr(17)livestat.u-paris.fr(1)

Website Identity

Facebook X (Twitter)Instagram YouTube TikTok Bluesky

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Last analyzed: 20 Feb 2026 at 12:57

Historical Analysis & Change Tracking