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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3cat.cat

https://3cat.cat· First analyzed 19 Feb 2026· Updated 19 Feb 2026

Export

3cat.cat

Sponsored

Hosting Provider

Stackscale BV

IP Address

185.104.134.129

Server Location

🇪🇸 Madrid, Spain

ASN

AS29119

Organization

Stackscale BV

Nameservers

ns-838.awsdns-40.net.ns-143.awsdns-17.com.ns-1525.awsdns-62.org.ns-1550.awsdns-01.co.uk.

Performance

Page Speed

1.4 MB

165 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

JAMstack

⚙️ SSR

Decoupled

Frontend

Framework

Next.js

API

Data Source

Headless CMS

Strapi

Infrastructure

Hosting

Stackscale BV

Detected API Sources

//cdn.id5-sync.com/api/1.0/id5...

Technology Stack

6 Technologies Detected

Libraries

Analytics

Meta Frameworks

CSS Frameworks

SEO Analysis

B72/100

3cat.cat3cat.cat

3Cat, la plataforma digital de continguts en català i de qualitat

A 3Cat hi trobaràs a la carta estrenes exclusives digitals, programes originals i els èxits de sempre. També els directes de TV3, Catalunya Ràdio i SX3

Title Length65 chars

Recommended: 50-60 chars

Description Length151 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag - every page should have one H1

3 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

21 rules

Sponsored

A+

Security Score

98%Excellent

Static / Informational

HTTPS

No WAF

180d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

GoDaddy.com, Inc.

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

18.07.2025

Valid Until

19.08.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.3cat.cat3cat.cat

SHA-256 Fingerprint

51:C6:15:3F:F5:F4:D0:23:86:20:71:77:61:16:3A:26:2D:A1:CC:28...

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

age

766

cache-control

🟡 275s(public, max-age=275, s-maxage=275, stale-while-revalidate=25)

content-encoding

📦 Gzip(gzip)

content-length

33666

content-security-policy

frame-ancestors 'self' https://*.ccma.cat https://*.3cat.cat...

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

smtp1.ccma.cat

smtp2.ccma.cat

Domain Information

3cat.cat

Domain Age

18y 3m

Created

08.11.2007

Expires

08.11.2026

Last Updated

23.12.2025

Registrar

Nominalia

DNSSEC

Not Enabled

Privacy & Compliance

Didomi

Cookie Consent Banner

Didomi

GDPR Indicators

Cookie consent banner detected

CMP: Didomi

Data Protection Officer mentioned

Typography & Readability

Bw 3cat + Arial

75/100

Readability

/30

32/40

15px · LH 1.60

Hierarchy

/20

18/25

3.08x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

17/20

System fonts

Heading Font

Bw 3cat

Sans46px

Body Font

Arial

Sans15px

Contrast Ratio

Reading Comfort

~45 CPL

Optimal (45–75)

46px

58px

16px

15px

⚠️ Small text: 15px may be hard to read on mobile. Consider 16px+.

✅ Optimal line spacing: 1.60 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 3.1x larger than body text.

✅ Excellent performance: System fonts eliminate font loading delays (better LCP).

✅ Smart font loading: Using font-display: swap prevents invisible text during load.

✅ Protected text on images: Using gradient for readability.

Buy on MyFonts

Business & Marketing Stack

4 Tools Detected

Enterprise

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Google AdsEnterprise

Ad platforms and retargeting pixels

Privacy & Cookies

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

statics.3cat.cat(15)local(3)static.chartbeat.com(1)sdk.privacy-center.org(1)

Sponsored

Last analyzed: 19 Feb 2026 at 09:43

Historical Analysis & Change Tracking