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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anwb.nl

https://anwb.nl· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

anwb.nl

Sponsored

Hosting Provider

Enflow B.V.

IP Address

89.106.200.151

Server Location

🇳🇱 The Hague, The Netherlands

ASN

AS209626

Nameservers

a8-64.akam.net.a1-184.akam.net.a2-64.akam.net.a9-65.akam.net.+2 more

Performance

Page Speed

1.5 MB

188 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Hybrid

⚙️ SSR

Frontend

Framework

Next.js

Styling

Tailwind CSS

Infrastructure

Hosting

Enflow B.V.

Technology Stack

8 Technologies Detected

Analytics

Meta Frameworks

CSS Frameworks

Tag Managers

Other

Reviews

SEO Analysis

A88/100

anwb.nlanwb.nl

ANWB helpt Nederland op weg | En niet alleen bij pech

ANWB is er voor jou, onderweg en op je bestemming. Met persoonlijke hulp, advies en informatie, ledenvoordeel en belangenbehartiging.

Title Length53 chars

Recommended: 50-60 chars

Description Length133 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (30/31)

1 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

36 URLs

robots.txt

56 rules

Sitemap reference found

Sponsored

Security Score

51%Poor

Interactive

HTTPS

No WAF

78d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

06.02.2026

Valid Until

07.05.2026

Subject Alternative Names (1)

www.anwb.nl

SHA-256 Fingerprint

A3:C0:9E:FB:25:AB:6E:2C:86:8A:1A:90:D4:72:C3:69:38:DB:B2:23...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🟡 0s(must-revalidate, max-age=0)

cache-status

"Netlify Edge"; hit, "Netlify Edge"; hit;detail=p1

content-encoding

📦 Gzip(gzip)

content-length

115626

content-security-policy-report-only

default-src 'self'; connect-src 'self' https://*.anwb.nl htt...

content-type

text/html; charset=utf-8

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (2)

anwb-nl.mail.protection.outlook.com

Domain Information

anwb.nl

Domain Age

31 years

Created

09.02.1995

Last Updated

24.11.2025

Registrar

KPN

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Data Protection Officer mentioned

Typography & Readability

Arial

77/100

Readability

/30

32/40

20px · LH 1.30

Hierarchy

/20

25/25

3.2x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

10/20

3 fonts

Heading Font

Arial

Sans64px

Body Font

Arial

Sans20px

Contrast Ratio

Reading Comfort

~37 CPL

Needs attention

64px

32px

14px

20px

✅ Excellent readability: 20px body text is ideal for all devices.

✅ Strong hierarchy: Headlines are 3.2x larger than body text.

✅ 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.

⚠️ Cramped layout: 54 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

4 Tools Detected

Enterprise

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Microsoft AdsEnterprise

Ad platforms and retargeting pixels

A/B Testing & Optimization

OptimizelyEnterprise

Experimentation and conversion optimization

Sponsored

Scripts & Styles

21 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(19)googletagmanager.com(1)

Website Identity

Facebook Instagram LinkedIn

Sponsored

Last analyzed: 17 Feb 2026 at 17:16

Historical Analysis & Change Tracking