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.

Back to Search

bnf.fr

https://bnf.fr· First analyzed 12 Feb 2026· Updated 12 Feb 2026

Export

bnf.fr

Mobile

Sponsored

Hosting Provider

BNF

IP Address

194.199.8.109

Server Location

🇫🇷 Paris, France

ASN

AS2200

Organization

BNF

Server

Apache

Nameservers

ariane.bnf.fr.galatee.bnf.fr.

Performance

Page Speed

1.8 MB

69 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Drupal

Technology Stack

3 Technologies Detected

Libraries

jQuery

CSS Frameworks

Tailwind CSS

Web Servers

Apache

SEO Analysis

C64/100

bnf.frbnf.fr

Accueil | BnF – Site institutionnel

Title Length35 chars

Recommended: 50-60 chars

Description Length1 chars

Recommended: 120-160 chars

Issues (0)

5 issues found

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Crawlability

Sitemap

Type: standard

2,547 URLs

robots.txt

41 rules

Sponsored

Security Score

41%Poor

Interactive

HTTPS

No WAF

108d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Trust Provider B.V.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

02.05.2025

Valid Until

31.05.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.bnf.frbnf.fr

SHA-256 Fingerprint

8C:C7:2F:B8:61:A1:5E:8F:7B:68:30:CD:EA:28:42:F0:5B:22:A0:5D...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

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

content-encoding

📦 Gzip(gzip)

content-language

content-length

24106

content-type

text/html; charset=UTF-8

date

Thu, 12 Feb 2026 12:57:21 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

maputo.bnf.fr

Domain Information

bnf.fr

Domain Age

31y 1m

Created

31.12.1994

Expires

31.12.2026

Last Updated

31.01.2026

Registrar

GIP RENATER

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

Typography & Readability

GabrielaStencil-Black + roboto_condensedlight

59/100

Readability

/30

40/40

16px · LH 1.43

Hierarchy

/20

21/25

2x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

10/20

3 fonts

Heading Font

GabrielaStencil-Black

Sans32px

Body Font

roboto_condensedlight

Sans16px

Contrast Ratio

Reading Comfort

~38 CPL

Needs attention

32px

24px

35px

16px

Minor Second

Scale

✅ Excellent readability: 16px body text is ideal for all devices.

✅ Optimal line spacing: 1.43 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.0x larger than body text.

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

⚠️ Cramped layout: 10 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

Microsoft ClarityFree

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Microsoft AdsEnterprise

Ad platforms and retargeting pixels

Sponsored

Scripts & Styles

12 Resources

Scripts

Styles

Async

Defer

Top Script Sources

static.addtoany.com(3)cdn.tarteaucitron.io(2)local(2)tag.aticdn.net(1)tarteaucitron.io(1)

Website Identity

Facebook X (Twitter)Instagram YouTube

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Last analyzed: 12 Feb 2026 at 12:57

Historical Analysis & Change Tracking