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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rijksmuseum.nl

https://rijksmuseum.nl· First analyzed 14 Feb 2026· Updated 14 Feb 2026

Export

rijksmuseum.nl

$Desktop screenshot of rijksmuseum.nl$

$Mobile screenshot of rijksmuseum.nl$

Mobile

Sponsored

Hosting Provider

Microsoft Azure

azure.microsoft.com

IP Address

20.50.2.49

Server Location

🇳🇱 Amsterdam, Netherlands

ASN

AS8075

Organization

Microsoft Azure App Service (westeurope)

CDN

Nameservers

ns3.surfnet.nl.ns1.surfnet.nl.ns1.zurich.surf.net.ns2.surfnet.nl.

Performance

Page Speed

775 KB

48 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Microsoft Azure

CDN

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

5 Technologies Detected

Analytics

CSS Frameworks

Tag Managers

Frameworks

SEO Analysis

A80/100

rijksmuseum.nlrijksmuseum.nl

Rijksmuseum, hét museum van Nederland

We vertellen het verhaal van 800 jaar Nederlandse geschiedenis met de grote meesters Rembrandt, Vermeer en Van Gogh. Midden in het historische centrum van Am...

Description truncated.

Title Length37 chars

Recommended: 50-60 chars

Description Length165 chars

Recommended: 120-160 chars

Issues (0)

3 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

60 URLs

robots.txt

5 rules

Sitemap reference found

Sponsored

A+

Security Score

100%Excellent

Static / Informational

HTTPS

No WAF

126d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

20.12.2025

Valid Until

20.06.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

www.rijksmuseum.nl

SHA-256 Fingerprint

C6:B3:4F:99:94:53:E0:B2:BA:2E:39:23:98:70:E3:8A:66:88:69:BE...

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🟡 300s(public, max-age=300)

content-security-policy

frame-ancestors 'self'

content-type

text/html; charset=utf-8

date

Sat, 14 Feb 2026 03:56:55 GMT

permissions-policy

payment=(self), geolocation=(self), microphone=(self), camer...

referrer-policy

strict-origin-when-cross-origin

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

rijksmuseum-nl.mail.protection.outlook.com

Domain Information

rijksmuseum.nl

Domain Age

30y 4m

Created

02.10.1995

Last Updated

09.10.2025

Registrar

SURF B.V.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Cookie consent banner detected

Typography & Readability

RijksText

70/100

Readability

/30

32/40

18px · LH 1.38

Hierarchy

/20

15/25

1.28x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

RijksText

Sans23px

Body Font

RijksText

Sans18px

Contrast Ratio

Reading Comfort

~36 CPL

Needs attention

23px

18px

✅ Excellent readability: 18px body text is ideal for all devices.

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

✅ Good performance: Using 1 font families keeps load times fast.

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

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

✅ Protected text on images: Using gradient for readability.

Buy on MyFonts

Business & Marketing Stack

8 Tools Detected

Enterprise

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

HotjarMid-Market

Microsoft ClarityFree

Matomo (Piwik)Mid-Market

KissmetricsMid-Market

User behavior and product analytics

Advertising

Microsoft AdsEnterprise

Ad platforms and retargeting pixels

A/B Testing & Optimization

ConvertMid-Market

Experimentation and conversion optimization

Sponsored

Scripts & Styles

12 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(8)rijksmuseum.nl(2)cdn-4.convertexperiments.com(1)

Website Identity

rijksmuseum.nl

30 years old

SURF B.V.📧 Microsoft 365

Social Profiles

Facebook Instagram LinkedIn YouTube TikTok

Sponsored

Last analyzed: 14 Feb 2026 at 03:57

Historical Analysis & Change Tracking