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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kth.se

https://kth.se· First analyzed 13 Feb 2026· Updated 13 Feb 2026

Export

kth.se

Mobile

Sponsored

Hosting Provider

Kungliga Tekniska Hogskolan

IP Address

130.237.28.40

Server Location

🇸🇪 Stockholm, Sweden

ASN

AS1653

Organization

Kungliga Tekniska Hogskolan

Nameservers

ns2.chalmers.se.nic2.lth.se.b.ns.kth.se.a.ns.kth.se.

Performance

Page Speed

745 KB

26 requests

Image Optimization

Lazy LoadWebP

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Kungliga Tekniska Hogskolan

Technology Stack

3 Technologies Detected

Libraries

jQuery

CSS Frameworks

Tailwind CSS

Analytics

Matomo

SEO Analysis

A85/100

kth.sekth.se

KTH - Sveriges största tekniska universitet | KTH

KTH - Kungliga Tekniska högskolan - är ett av Europas ledande tekniska universitet och samlar studenter, forskare och fakultet från hela världen.

Title Length50 chars

Recommended: 50-60 chars

Description Length145 chars

Recommended: 120-160 chars

Issues (0)

2 issues found

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Crawlability

Sitemap

Type: standard

78 URLs

robots.txt

40 rules

Sitemap reference found

Sponsored

Security Score

81%Very Good

Interactive

HTTPS

No WAF

188d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

20.08.2025

Valid Until

20.08.2026

OCSP Stapling

Enabled

Subject Alternative Names (3)

ns-vip-01.sys.kth.sewww.kth.sekth.se

SHA-256 Fingerprint

40:9E:23:60:03:21:3E:77:D8:1D:41:8A:9F:6B:33:BD:BB:7F:C9:48...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🟡 120s(max-age=120,public)

content-encoding

📦 Gzip(gzip)

content-language

sv-SE

content-security-policy

default-src 'none'; connect-src 'self' https://app.kth.se ht...

content-type

text/html;charset=UTF-8

date

Fri, 13 Feb 2026 04:53:09 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (4)

mailfilter-ng-4.sunet.se

mailfilter-ng-2.sunet.se

mailfilter-ng-1.sunet.se

mailfilter-ng-3.sunet.se

Domain Information

kth.se

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Typography & Readability

Figtree

83/100

Readability

/30

40/40

20px · LH 1.50

Hierarchy

/20

20/25

1.5x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Figtree

Sans30px

Body Font

Figtree

Sans20px

Contrast Ratio

Reading Comfort

~34 CPL

Needs attention

30px

24px

20px

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

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Good hierarchy: Clear distinction between headlines and 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

2 Tools Detected

Growing

Behavior Analytics

Matomo (Piwik)Mid-Market

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

7 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(3)analytics.sys.kth.se(1)app.kth.se(1)

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Last analyzed: 13 Feb 2026 at 04:53

Historical Analysis & Change Tracking