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.

Back to Search

libero.it

https://libero.it· First analyzed 12 Feb 2026· Updated 12 Feb 2026

Export

libero.it

Mobile

Sponsored

Hosting Provider

Italiaonline S.p.A

IP Address

213.209.17.209

Server Location

🇮🇹 Assago, Italy

ASN

AS8660

Organization

Italiaonline S.p.A

Server

Apache

CDN

CloudFront

Nameservers

ns2.iol.it.ns1.italiaonline.it.

Performance

Page Speed

366 KB

112 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Italiaonline S.p.A

CDN

CloudFront

Progressive Web App

Web ManifestApple Touch Icon

Technology Stack

5 Technologies Detected

Meta Frameworks

CSS Frameworks

Advertising

Web Servers

Customer Support

SEO Analysis

A82/100

libero.itlibero.it

Libero: Mail, Ricerca e News con aggiornamento quotidiano

Entra su Libero.it: Mail e Email PEC, Login, le Ultime Notizie con aggiornamento quotidiano, Community, Video, Motore di Ricerca e tanto altro

Title Length57 chars

Recommended: 50-60 chars

Description Length142 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (207/213)

2 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

robots.txt

126 rules

Sitemap reference found

Sponsored

Security Score

31%Critical

Interactive

HTTPS

No WAF

152d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

14.07.2025

Valid Until

14.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.libero.itlibero.it

SHA-256 Fingerprint

FB:CA:58:05:71:A2:C7:9D:4F:91:62:53:12:0F:3B:FA:64:4C:DE:9D...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

age

cache-control

🟡 20s(public, max-age=20)

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=UTF-8

date

Thu, 12 Feb 2026 23:48:09 GMT

last-modified

Thu, 12 Feb 2026 23:48:09 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

smtp-in.libero.it

Domain Information

libero.it

DNSSEC

Not Enabled

Privacy & Compliance

iubenda

Cookie Consent Banner

iubenda

GDPR Indicators

Cookie consent banner detected

CMP: iubenda

Typography & Readability

InterVariable

63/100

Readability

/30

20/40

10px · LH 1.50

Hierarchy

/20

20/25

1.6x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

InterVariable

Sans16px

Body Font

InterVariable

Sans10px

Contrast Ratio

Reading Comfort

~51 CPL

Optimal (45–75)

16px

24px

12px

14px

10px

Minor Second

Scale

❌ Critical: 10px body text is too small. Increase to at least 14px.

✅ 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.

✅ Protected text on images: Using gradient for readability.

Buy on MyFonts

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

IubendaSMB

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

21 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(5)cdn.iubenda.com(3)cdn-gl.imrworldwide.com(2)i5.plug.it(2)iolam.it(2)

Website Identity

Facebook X (Twitter)

Sponsored

Last analyzed: 12 Feb 2026 at 23:48

Historical Analysis & Change Tracking