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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annefrank.org

https://annefrank.org· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

annefrank.org

Sponsored

Hosting Provider

Equinix Customer - Centric Netherlands B.V.

IP Address

80.252.83.171

Server Location

🇳🇱 Amsterdam, Netherlands

ASN

AS15830

Organization

Equinix Customer - Centric Netherlands B.V.

CDN

Cloudflare

WAF

Cloudflare

Nameservers

jay.ns.cloudflare.com.leah.ns.cloudflare.com.

Performance

Page Speed

1.1 MB

26 requests

Image Optimization

Responsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Equinix Customer - Centric Netherlands B.V.

CDN

Cloudflare

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

2 Technologies Detected

CSS Frameworks

Tailwind CSS

Analytics

Matomo

SEO Analysis

B72/100

annefrank.organnefrank.org

Home | Anne Frank House

The official website of the Anne Frank House, with the most complete and up-to-date information about Anne Frank, her diary, and the Secret Annex. Visit our ...

Description truncated.

Title Length23 chars

Recommended: 50-60 chars

Description Length228 chars

Recommended: 120-160 chars

Issues (0)

4 issues found

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Crawlability

Sitemap

Type: standard

2,344 URLs

robots.txt

Sponsored

Security Score

71%Good

Interactive

HTTPS

No WAF

147d

Certificate Details

Type

Extended Validation (EV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

14.07.2025

Valid Until

14.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

www.annefrank.organnefrank.org

SHA-256 Fingerprint

5C:2B:AD:66:EC:3A:39:A4:11:96:76:5F:75:7A:54:55:63:0F:9A:7C...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🟡 40s(max-age=40)

connection

keep-alive

content-encoding

📦 Gzip(gzip)

content-language

content-length

10025

content-security-policy

frame-ancestors 'self' https://www.maykinmedia.nl https://ww...

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (2)

relay.centriconline.eu

mail.centriconline.eu

Domain Information

annefrank.org

Domain Age

22y 11m

Created

16.03.2003

Expires

16.03.2026

Last Updated

03.11.2025

Registrar

Hosting Concepts B.V. d/b/a Registrar.eu

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Graphik

66/100

Readability

/30

25/40

18px · LH 1.11

Hierarchy

/20

18/25

4x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Graphik

Sans72px

Body Font

Graphik

Sans18px

Contrast Ratio

Reading Comfort

~44 CPL

Needs attention

72px

18px

24px

18px

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

⚠️ Tight line spacing (1.11). Consider 1.4-1.6 for better readability.

✅ Strong hierarchy: Headlines are 4.0x larger than body text.

✅ Good performance: Using 2 font families keeps load times fast.

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

⚠️ Cramped layout: 17 elements lack adequate spacing.

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

9 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(3)annefrank.piwik.pro(1)annefrank.containers.piwik.pro(1)annefrank.org(1)extend.vimeocdn.com(1)

Website Identity

Facebook Instagram TikTok

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Last analyzed: 17 Feb 2026 at 15:35

Historical Analysis & Change Tracking