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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dermnetnz.org

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

Export

dermnetnz.org

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

104.26.4.146

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

lady.ns.cloudflare.com.jim.ns.cloudflare.com.

Performance

Page Speed

1.3 MB

81 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

SilverStripe

Technology Stack

8 Technologies Detected

Analytics

CSS Frameworks

Tag Managers

Advertising

CDN

Security

SEO Analysis

B78/100

dermnetnz.orgdermnetnz.org

DermNet

Welcome to DermNet, the world's leading free dermatology resource. Scroll through evidence-based information on dermatological diseases (skin conditions), pr...

Description truncated.

Title Length7 chars

Recommended: 50-60 chars

Description Length182 chars

Recommended: 120-160 chars

Issues (0)

3 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

4 rules

Sponsored

Security Score

46%Poor

Interactive

HTTPS

WAF

55d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

14.01.2026

Valid Until

14.04.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

dermnetnz.org*.dermnetnz.org

SHA-256 Fingerprint

DD:60:67:78:95:8A:95:48:C6:70:36:BE:78:B3:F0:47:BF:A5:69:AC...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

age

3108

cache-control

🟡 12 Hours(max-age=43200, must-revalidate)

cf-cache-status

HIT

cf-ray🇩🇪 Frankfurt

9cf8fd82f9b59b4c-FRA

content-encoding

⚡ Brotli(br)

content-type

text/html; charset=utf-8

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (5)

aspmx.l.google.com

alt2.aspmx.l.google.com

alt1.aspmx.l.google.com

alt3.aspmx.l.google.com

+1 more

Domain Information

dermnetnz.org

Domain Age

25y 3m

Created

01.11.2000

Expires

01.11.2026

Last Updated

24.11.2025

Registrar

Instra Corporation Pty Ltd.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Poppins

51/100

Readability

/30

5/40

13px · LH 1.10

Hierarchy

/20

25/25

2.08x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Poppins

Sans27px

Body Font

Poppins

Sans13px

Contrast Ratio

Reading Comfort

~44 CPL

Needs attention

27px

20px

42px

13px

Minor Second

Scale

❌ Critical: 13px body text is too small. Increase to at least 14px.

⚠️ Tight line spacing (1.10). Consider 1.4-1.6 for better readability.

✅ Strong hierarchy: Headlines are 2.1x larger than body text.

✅ 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.

Buy on MyFonts

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

19 Resources

Scripts

Styles

Async

Defer

Top Script Sources

cdn.privacy-mgmt.com(3)secure.adnxs.com(2)securepubads.g.doubleclick.net(2)aim-tag.hcn.health(2)gstatic.com(1)

Website Identity

Facebook X (Twitter)Instagram

Sponsored

Last analyzed: 17 Feb 2026 at 23:16

Historical Analysis & Change Tracking