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

elperiodico.com

https://elperiodico.com· First analyzed 13 Feb 2026· Updated 13 Feb 2026

Export

elperiodico.com

Mobile

Sponsored

Hosting Provider

Telefonica De Espana S.A.U.

IP Address

195.76.147.109

Server Location

🇪🇸 Madrid, Spain

ASN

AS3352

Nameservers

ns1.epi.es.ns2.epi.es.

Performance

Page Speed

510 KB

116 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

JAMstack

⚙️ SSR

Decoupled

Frontend

Framework

Nuxt.js

API

Data Source

Headless CMS

Strapi

Infrastructure

Hosting

Telefonica De Espana S.A.U.

Detected API Sources

https://cdn-eu.piano.io/api/ti...

Technology Stack

12 Technologies Detected

Advertising

Google Ads Google AdSense Taboola Outbrain

Meta Frameworks

Analytics

CSS Frameworks

Tag Managers

Payments

Customer Support

SEO Analysis

A88/100

elperiodico.comelperiodico.com

El Periódico - Noticias y última hora de Catalunya, España y el mundo

Noticias de última hora en torno a la actualidad de Catalunya y España, Barça, deportes, internacional, economía, cultura, sociedad y más

Title Length69 chars

Recommended: 50-60 chars

Description Length137 chars

Recommended: 120-160 chars

Issues (0)

2 issues found

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Crawlability

Sitemap

Type: standard

robots.txt

103 rules

Sitemap reference found

Sponsored

Security Score

0%Critical

Critical / Transactional

HTTPS

No WAF

388d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

GlobalSign nv-sa

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

04.02.2026

Valid Until

08.03.2027

OCSP Stapling

Enabled

Subject Alternative Names (20)

*.prensaiberica.es*.albaeditorial.es*.albergaria.es*.campusfcbarcelona.com*.codigonuevo.com*.cuore.es*.deia.eus*.diaridegirona.cat+12 more

SHA-256 Fingerprint

20:AC:6F:64:6A:58:15:6A:4D:3A:A2:69:E7:31:DF:0A:51:EC:5C:4C...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

access-control-allow-origin

cache-control

🟡 60s(public, max-age=60)

content-encoding

📦 Gzip(gzip)

content-length

184604

content-type

text/html;charset=utf-8

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

mx.renr.es

Domain Information

elperiodico.com

Domain Age

29y 9m

Created

23.05.1996

Expires

24.05.2026

Last Updated

17.04.2024

Registrar

10dencehispahard, S.L.

DNSSEC

Not Enabled

Privacy & Compliance

Didomi

Cookie Consent Banner

Didomi

GDPR Indicators

Cookie consent banner detected

CMP: Didomi

Data Protection Officer mentioned

Typography & Readability

Google-Inter--Medium + -apple-system

87/100

Readability

/30

32/40

15px · LH 1.60

Hierarchy

/20

25/25

2.13x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

Google-Inter--Medium

Sans32px

Body Font

-apple-system

Sans15px

Contrast Ratio

Reading Comfort

~42 CPL

Needs attention

32px

16px

14px

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 2.1x 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

7 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

Social Media

Facebook SDKFree

Social widgets and sharing tools

A/B Testing & Optimization

KameleoonEnterprise

Experimentation and conversion optimization

Reviews & Social Proof

TrustpilotMid-Market

Customer reviews and testimonials

Sponsored

Scripts & Styles

23 Resources

Scripts

Styles

Async

Defer

Top Script Sources

estaticos-cds.prensaiberica.es(7)cdn.cxense.com(2)googletagmanager.com(2)sdk.privacy-center.org(2)api-esp-eu.piano.io(1)

Website Identity

Facebook X (Twitter)Instagram LinkedIn

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Last analyzed: 13 Feb 2026 at 07:34

Historical Analysis & Change Tracking