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

psg.fr

https://psg.fr· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

psg.fr

Sponsored

Hosting Provider

Vercel

vercel.com

IP Address

64.239.109.193

Server Location

🇺🇸 Walnut, United States

ASN

AS16509

Organization

Vercel, Inc

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns1.iptwins.net.ns2.iptwins.net.ns3.iptwins.com.ns4.iptwins.com.

Performance

Page Speed

2.9 MB

164 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

JAMstack

🔀 Hybrid

Decoupled

Frontend

Framework

Next.js

API

Data Source

Headless CMS

Strapi

Infrastructure

Hosting

Vercel

CDN

Cloudflare

Detected API Sources

https://api.psg.fr/umbraco/akq...

Technology Stack

7 Technologies Detected

Analytics

Meta Frameworks

CSS Frameworks

Tag Managers

Advertising

CDN

SEO Analysis

B76/100

psg.frpsg.fr

PSG.FR | Official site of Paris Saint-Germain

Dive into the heart of Paris Saint-Germain: follow the latest news and live matches, discover exclusive content, and feel the excitement with PSG players.

Title Length45 chars

Recommended: 50-60 chars

Description Length154 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (66/102)

2 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

27 rules

Sitemap reference found

Sponsored

A+

Security Score

100%Excellent

Static / Informational

HTTPS

WAF

75d

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+H3

Valid From

02.02.2026

Valid Until

04.05.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

www.psg.fr

SHA-256 Fingerprint

81:C0:96:0C:45:A1:C3:6A:13:38:CE:24:62:C7:B7:6A:5C:27:5D:C6...

Upgrade to view header details

HTTP Headers

Developer Console

date

Tue, 17 Feb 2026 07:15:45 GMT

content-type

text/html; charset=utf-8

access-control-allow-origin

https://www.googletagmanager.com https://www.google-analytic...

age

700

cache-control

🟡 0s(public, max-age=0, must-revalidate)

content-security-policy

base-uri 'self'; form-action 'self' https://forms.office.com...

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

mxa-004e2f03.gslb.pphosted.com

mxb-004e2f03.gslb.pphosted.com

Domain Information

psg.fr

Domain Age

26y 9m

Created

05.05.1999

Expires

29.06.2027

Last Updated

22.04.2024

Registrar

IP TWINS SAS

DNSSEC

Not Enabled

Privacy & Compliance

Didomi

Cookie Consent Banner

Didomi

GDPR Indicators

Cookie consent banner detected

CMP: Didomi

Typography & Readability

Helvetica

73/100

Readability

/30

32/40

14px · LH 1.71

Hierarchy

/20

25/25

4x ratio

WCAG

/25

7/15

Contrast: undefined

Performance

/25

14/20

System fonts

Heading Font

Helvetica

Sans56px

Body Font

Helvetica

Sans14px

Contrast Ratio

Reading Comfort

~56 CPL

Optimal (45–75)

56px

24px

40px

14px

Minor Second

Scale

⚠️ Small text: 14px may be hard to read on mobile. Consider 16px+.

✅ Optimal line spacing: 1.71 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 4.0x larger than body text.

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

✅ 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

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

22 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(18)googletagmanager.com(1)sdk.privacy-center.org(1)

Website Identity

Facebook X (Twitter)Instagram TikTok Discord Threads

Sponsored

Last analyzed: 17 Feb 2026 at 07:16

Historical Analysis & Change Tracking