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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franceculture.fr

https://franceculture.fr· First analyzed 16 Feb 2026· Updated 16 Feb 2026

Export

franceculture.fr

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

35.181.27.204

Server Location

🇫🇷 Paris, France

ASN

AS16509

Organization

AWS EC2 (eu-west-3)

CDN

Akamai

WAF

Akamai

Nameservers

ns-865.awsdns-44.net.ns-1266.awsdns-30.org.ns-1895.awsdns-44.co.uk.ns-317.awsdns-39.com.

Performance

Page Speed

1 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

Svelte

Infrastructure

Hosting

Amazon Web Services (AWS)

CDN

Akamai

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

10 Technologies Detected

Analytics

Google Analytics

Facebook Pixel Amplitude FullStory

Meta Frameworks

Frameworks

CSS Frameworks

Advertising

Customer Support

SEO Analysis

A82/100

franceculture.frfranceculture.fr

France Culture – Écouter la radio en direct et podcasts gratuitement

S'informer, développer sa curiosité et apprendre chaque jour avec les émissions de France Culture. Écoutez la radio en direct, en replay et podcasts.

Title Length68 chars

Recommended: 50-60 chars

Description Length149 chars

Recommended: 120-160 chars

Issues (0)

3 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

486 URLs

robots.txt

145 rules

Sitemap reference found

Sponsored

A+

Security Score

91%Excellent

Interactive

HTTPS

WAF

75d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

02.02.2026

Valid Until

03.05.2026

Subject Alternative Names (20)

api.radiofrance.frbeta.radiofrance.frcdn.radiofrance.frembed.radiofrance.frhyperradio.radiofrance.commedia.radiofrance-podcast.netmediateur.radiofrance.comoblique.radiofrance.fr+12 more

SHA-256 Fingerprint

A4:D0:3F:C3:5E:9D:C3:FE:48:2D:D5:50:6A:2D:59:BB:79:3A:C5:AB...

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

cache-control

🟡 271s(public, max-age=271)

content-encoding

📦 Gzip(gzip)

content-security-policy

frame-ancestors 'self'

content-type

text/html; charset=UTF-8

date

Mon, 16 Feb 2026 12:23:37 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

franceculture.fr

Domain Age

20y 12m

Created

24.02.2005

Expires

07.11.2026

Last Updated

10.11.2025

Registrar

NAMESHIELD

DNSSEC

Not Enabled

Privacy & Compliance

Didomi

Cookie Consent Banner

Didomi

GDPR Indicators

Cookie consent banner detected

CMP: Didomi

Data Protection Officer mentioned

Typography & Readability

outfitregular + franklin_gothic_stdLight

77/100

Readability

/30

32/40

15px · LH 1.71

Hierarchy

/20

25/25

2.13x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

10/20

3 fonts

Heading Font

outfitregular

Sans32px

Body Font

franklin_gothic_stdLight

Sans15px

Contrast Ratio

Reading Comfort

~39 CPL

Needs attention

32px

15px

Minor Second

Scale

⚠️ Small text: 15px may be hard to read on mobile. Consider 16px+.

✅ Optimal line spacing: 1.71 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.1x larger than body text.

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

⚠️ Cramped layout: 183 elements lack adequate spacing.

✅ Clean layout: Consistent left alignment throughout.

Buy on MyFonts

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google AnalyticsFree

Google Tag ManagerFree

User behavior and product analytics

Privacy & Cookies

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

16 Resources

Scripts

Styles

Async

Defer

Top Script Sources

sdk.privacy-center.org(2)amplify.outbrain.com(1)googletagmanager.com(1)cdn.eu.amplitude.com(1)s.go-mpulse.net(1)

Website Identity

Facebook X (Twitter)Instagram LinkedIn YouTube TikTok Bluesky

Sponsored

Last analyzed: 16 Feb 2026 at 12:24

Historical Analysis & Change Tracking