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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operadeparis.fr

https://operadeparis.fr· First analyzed 20 Feb 2026· Updated 20 Feb 2026

Export

operadeparis.fr

Sponsored

Hosting Provider

CLARAFR

IP Address

89.185.44.102

Server Location

🇫🇷 Paris, France

ASN

AS8426

Server

Nginx

CDN

Nameservers

nsc.perf1.com.nsb.perf1.com.nsa.perf1.fr.

Performance

Page Speed

3 MB

151 requests

Image Optimization

Lazy LoadResponsiveCloudinaryimgix

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

CLARAFR

CDN

Technology Stack

9 Technologies Detected

Analytics

Libraries

Other

CSS Frameworks

Fonts

Tag Managers

Advertising

Web Servers

SEO Analysis

C67/100

operadeparis.froperadeparis.fr

Opéra national de Paris

Le Palais Garnier et l’Opéra Bastille. Programmation, Billetterie, Informations pratiques.

Title Length23 chars

Recommended: 50-60 chars

Description Length90 chars

Recommended: 120-160 chars

Issues (0)

5 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

2 URLs

robots.txt

3 rules

Allows all crawlers

Sponsored

Security Score

41%Poor

Interactive

HTTPS

No WAF

75d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Gandi

Key Algorithm

RSA (2048 bit)

Signature

SHA-384 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

06.05.2025

Valid Until

06.05.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.operadeparis.froperadeparis.fr

SHA-256 Fingerprint

4F:5E:F6:C1:26:69:B9:7D:2F:D6:22:E9:D4:6E:8A:67:AA:28:8B:58...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

age

2232

cache-control

🟡 0s(max-age=0, must-revalidate, public, s-maxage=3600)

content-encoding

📦 Gzip(gzip)

content-security-policy

base-uri 'self';connect-src 'self' *.doubleclick.net wss://o...

content-type

text/html; charset=UTF-8

date

Fri, 20 Feb 2026 10:09:34 GMT

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

operadeparis-fr.mail.protection.outlook.com

Domain Information

operadeparis.fr

Domain Age

26y 1m

Created

27.01.2000

Expires

15.07.2026

Last Updated

03.07.2025

Registrar

NAMESHIELD

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

Typography & Readability

whyte-regular

51/100

Readability

/30

20/40

13px · LH 1.50

Hierarchy

/20

8/25

0.92x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

whyte-regular

Sans12px

Body Font

whyte-regular

Sans13px

Contrast Ratio

Reading Comfort

~41 CPL

Needs attention

12px

40px

16px

13px

❌ Critical: 13px body text is too small. Increase to at least 14px.

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

⚠️ 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.

✅ Protected text on images: Using gradient for readability.

GGoogle Fonts Buy on MyFonts

Business & Marketing Stack

5 Tools Detected

Enterprise

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

Matomo (Piwik)Mid-Market

User behavior and product analytics

Advertising

Microsoft AdsEnterprise

Ad platforms and retargeting pixels

A/B Testing & Optimization

KameleoonEnterprise

Experimentation and conversion optimization

Sponsored

Scripts & Styles

23 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(3)youtube.com(2)securepubads.g.doubleclick.net(2)17b1621a.tag.imagino.com(1)static.axept.io(1)

Website Identity

Facebook X (Twitter)Instagram LinkedIn YouTube Threads

Sponsored

Last analyzed: 20 Feb 2026 at 10:09

Historical Analysis & Change Tracking