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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overheid.nl

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

Export

overheid.nl

Mobile

Sponsored

Hosting Provider

ODC-Noord

IP Address

147.181.37.238

Server Location

🇳🇱 Groningen, The Netherlands

ASN

AS202553

Organization

ODC-Noord

Nameservers

ns0.rijksoverheidnl.com.ns2.rijksoverheidnl.eu.ns1.rijksoverheidnl.nl.ns3.rijksoverheidnl.org.

Performance

Page Speed

2.1 MB

23 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Drupal

Technology Stack

3 Technologies Detected

Libraries

jQuery

CSS Frameworks

Tailwind CSS

Analytics

Matomo

SEO Analysis

F35/100

overheid.nloverheid.nl

Homepage | Overheid.nl

No description available for this page.

Title Length22 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (3)

• Missing meta description - important for click-through rates
• Missing H1 tag - every page should have one H1
• Many images missing alt text (1/1)

7 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

158 URLs

robots.txt

62 rules

Sitemap reference found

Sponsored

Security Score

86%Very Good

Interactive

HTTPS

No WAF

81d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

CERTSIGN SA

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 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)

overheid.nlwww.overheid.nl

SHA-256 Fingerprint

49:15:34:F9:2F:B0:92:39:72:F8:39:1C:A7:99:6A:5E:B2:01:DE:A6...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🟢 1 Year(max-age=31536000, public)

content-encoding

📦 Gzip(gzip)

content-language

content-security-policy

default-src 'self'; script-src 'self' https://*.overheid.nl ...

content-type

text/html; charset=UTF-8

date

Sat, 14 Feb 2026 05:54:26 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

100

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

mail2.ssonet.nl

mail.ssonet.nl

Domain Information

overheid.nl

Domain Age

27y 2m

Created

04.12.1998

Last Updated

29.10.2024

Registrar

Rijksoverheid

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Rijksoverheid Sans + sans-serif

53/100

Readability

/30

40/40

18px · LH 1.50

Hierarchy

/20

8/25

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Rijksoverheid Sans

Sans

Body Font

sans-serif

Sans18px

Contrast Ratio

Reading Comfort

~32 CPL

Needs attention

33px

18px

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

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Good performance: Using 1 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.

✅ Clean layout: Consistent left alignment throughout.

Buy on MyFonts

Business & Marketing Stack

3 Tools Detected

Growing

Behavior Analytics

Matomo (Piwik)Mid-Market

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

7 Resources

Scripts

Styles

Async

Defer

Top Script Sources

koop.piwik.pro(2)local(2)

Sponsored

Last analyzed: 14 Feb 2026 at 05:54

Historical Analysis & Change Tracking