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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tno.nl

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

Export

tno.nl

Mobile

Sponsored

Hosting Provider

iProx Hosting

IP Address

185.38.232.132

Server Location

🇳🇱 Amsterdam, The Netherlands

ASN

AS34427

Organization

iProx Hosting

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

app-dns01.tno.nl.app-dns02.tno.nl.ns1.surfnet.nl.

Performance

Page Speed

2.9 MB

60 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

iProx Hosting

CDN

Cloudflare

Technology Stack

6 Technologies Detected

Meta Frameworks

Libraries

CSS Frameworks

Analytics

Other

CDN

SEO Analysis

C67/100

tno.nltno.nl

Innovation for life | TNO

Impactvolle innovaties creëren voor duurzaam welzijn en welvaart van de samenleving.

Title Length25 chars

Recommended: 50-60 chars

Description Length84 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (25/26)

4 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

2 URLs

robots.txt

10 rules

Sitemap reference found

Sponsored

A+

Security Score

91%Excellent

Interactive

HTTPS

WAF

289d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

03.12.2025

Valid Until

03.12.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

tno.nlwww.tno.nl

SHA-256 Fingerprint

A6:63:F9:27:ED:FA:36:76:1C:5D:17:AD:C3:B5:18:BD:2A:57:31:68...

Upgrade to view header details

HTTP Headers

Developer Console

age

199

alt-svc

h3=":443"; ma=86400

cache-control

🟡 300s(public, max-age=300, s-maxage=300)

cf-cache-status

HIT

cf-ray🇩🇪 Frankfurt

9cf41a9f6974e5da-FRA

content-encoding

⚡ Brotli(br)

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

tno-nl.a-v1.mx.microsoft

Domain Information

tno.nl

Domain Age

38y 9m

Created

01.06.1987

Last Updated

09.05.2025

Registrar

SURF B.V.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Object Sans + sans-serif

78/100

Readability

/30

40/40

20px · LH 1.40

Hierarchy

/20

15/25

1x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Object Sans

Sans20px

Body Font

sans-serif

Sans20px

Contrast Ratio

Reading Comfort

~39 CPL

Needs attention

20px

33px

20px

Perfect Fourth

Scale

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

✅ Optimal line spacing: 1.40 ratio ensures comfortable reading.

⚠️ Weak hierarchy: Headlines should be at least 2x body size for clear visual structure.

✅ 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: 10 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

Matomo (Piwik)Mid-Market

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

A/B Testing & Optimization

AB TastyMid-Market

Experimentation and conversion optimization

Sponsored

Scripts & Styles

19 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(9)youtube.com(2)tno.containers.piwik.pro(2)try.abtasty.com(1)

Website Identity

Facebook Instagram LinkedIn

Sponsored

Last analyzed: 17 Feb 2026 at 09:02

Historical Analysis & Change Tracking