About Zulien Score

Zulien Score is a free online audit tool that analyzes e-commerce stores across 100+ checkpoints covering performance, SEO, security, mobile experience, AI readiness, GDPR compliance, and vulnerability scanning. Works with PrestaShop, WooCommerce, Magento, Shopify, and any custom platform. Get actionable insights to improve your store in 60 seconds.

Why we built this

Most e-commerce store owners don't know their store has problems until customers start leaving. We built Zulien Score to give you a free, honest health check — no signup, no credit card, no strings. Just paste your URL and get results in 60 seconds. We optimize stores on any platform.

Scoring Methodology

Your overall score (0-100) is a weighted average of 7 categories — plus an 8th NIS2 category for businesses that fall under the EU NIS2 directive (Annex I/II sectors with 50+ employees / €10M+ turnover). Each category score is based on automated checks against industry best practices and standards (Google Core Web Vitals, OWASP, GDPR requirements, Schema.org specs, NIS2 Article 21).

We use data from Google PageSpeed Insights API, Chrome UX Report (CrUX) real-user data, and our own scan engine that analyzes HTML, HTTP headers, DNS, SSL certificates, and file exposure.

Results are cached for 6 hours. Use the "Rescan" button to force a fresh analysis.

Performance25%
SEO20%
Security15%
Mobile10%
AI Readiness10%
GDPR10%
Vulnerability10%

Grade Scale

A90-100
B80-89
C70-79
D50-69
F0-49

Scores below 60 indicate serious issues that are likely costing you customers and search rankings.

What we check

Server Response Time (TTFB)
First Contentful Paint (FCP)
Largest Contentful Paint (LCP) — Core Web Vital
Total Blocking Time (TBT)
Cumulative Layout Shift (CLS) — Core Web Vital
Speed Index
Total Page Weight & HTTP Requests
Render-blocking Resources
Unused CSS/JS Detection
Text Compression (gzip/brotli)
DOM Size Analysis
Third-party Script Impact
Meta Title (length & quality)
Meta Description (length & quality)
H1 Heading (uniqueness & keyword)
Content Structure (H2 hierarchy)
Open Graph Tags (complete set)
Twitter/X Cards
Canonical URL
Structured Data (JSON-LD types)
robots.txt Analysis
XML Sitemap Validation
HTML lang Attribute
Image Alt Attributes (% coverage)
Meta Robots (noindex detection)
Hreflang Tags (multilingual)
Text-to-HTML Ratio
SSL/TLS Certificate
HTTP→HTTPS Redirect
HSTS (max-age, includeSubDomains, preload)
Content-Security-Policy (unsafe-inline/eval detection)
Clickjacking Protection (X-Frame-Options / frame-ancestors)
X-Content-Type-Options
Referrer-Policy
Permissions-Policy
Cookie Security Flags (Secure, HttpOnly, SameSite)
Technology Disclosure (Server, X-Powered-By)
Subresource Integrity (SRI) on External Scripts
security.txt (RFC 9116)
Server Version Disclosure (Apache/Nginx version hidden)
CDN / WAF Protection (Cloudflare, Sucuri, Fastly)
Viewport Configuration (zoom, scale)
Mobile Performance Score (Google Lighthouse)
Desktop/Mobile Performance Gap
Touch Target Size (≥48×48px)
Font Size Readability
Content Viewport Fit (no horizontal scroll)
Responsive Design Techniques (Flexbox, Grid, media queries)
PWA Features (Manifest + Service Worker)
AMP Detection
AI Bot Access Policy (GPTBot, ClaudeBot, PerplexityBot, 20+ bots)
llms.txt Validation (format, H1, blockquote, links per llmstxt.org spec)
llms-full.txt (Complete AI Content File)
Content Accessibility for AI (SSR vs JS-dependent)
Structured Data Foundation (JSON-LD types & coverage)
Product Schema Completeness (name, offers, ratings, SKU, brand, availability)
Organization Schema + Entity Linking (sameAs to Wikipedia, LinkedIn, socials)
FAQ Schema (Direct AI Answer Extraction)
Breadcrumb Schema (Navigation Hierarchy)
Site Search Schema (SearchAction for AI Store Search)
Content Depth for AI (word count, citation-worthiness)
Answer-First Content Format (BLUF methodology)
Heading Hierarchy (H1→H2→H3 outline for AI parsing)
Semantic HTML Structure (<main>, <article>, <nav>, <aside>)
Structured Content (Lists & Tables for AI extraction)
Content Freshness Signals (dateModified, visible dates)
Entity Clarity & Brand Signals (OG tags + sameAs cross-linking)
Author Expertise Signals (E-E-A-T — Person schema, credentials)
Reviews & Ratings Schema (AggregateRating, social proof)
AI Plugin Manifest (.well-known/ai-plugin.json)
Product Feed for AI Commerce (Google Merchant, XML feeds)
Speakable Content (Voice AI readiness — SpeakableSpecification)
Extractable Answer Blocks (paragraph length 40-80 words optimal)
Statistics & Data Presence (+41% AI visibility with data points)
Section Length Optimization (120-180 words per section)
Q&A Format Headings (question-phrased H2/H3 for AI extraction)
Internal Link Density (contextual links per 1,000 words)
Canonical Tag Consistency (AI deduplication)
Return Policy Schema (MerchantReturnPolicy)
Shipping Details Schema (OfferShippingDetails)
Knowledge Graph Readiness (@id, sameAs, brand consistency)
Content Readability (Flesch-Kincaid grade 8-10 optimal)
Image Alt Text Quality (3-15 word descriptive alt text)
Expert Quotations & Citations (blockquote, authority links)
ai.txt (Emerging AI permissions standard)
WebMCP Agentic Readiness (W3C standard, Chrome 146+)
Content-to-Boilerplate Ratio (main content vs noise)
Cookie Consent Banner (CMP detection)
Tracking Scripts Without Consent
Google Consent Mode v2
Privacy Policy Page
Cookie Policy (separate)
Legal Contact / Imprint Page
Terms & Conditions Page
Data Encryption (Mixed Content)
Third-party Data Sharing Audit
Personal Data Exposure in Source
CMS Version Disclosure (meta generator)
Sensitive Files (.env, .git, composer.json)
PHP Info Page Exposure
Backup Files (SQL dumps, ZIP archives)
Directory Listing
Admin Panel at Default URL
Debug Mode / Error Exposure
Outdated jQuery Detection (CVE mapping)
Outdated Bootstrap Detection (CVE-2018-20676, CVE-2019-8331, CVE-2024-6484)
CMS End of Life Detection (PrestaShop, WordPress, Magento)
PHP Version End of Life (EOL detection + upgrade advice)
Legacy Module Detection (PS modules, WP plugins — known risky)
CMS Information Files (readme, changelog)
CORS Misconfiguration
Form CSRF Token Protection
Email Address Harvesting
X-Powered-By Header Disclosure
Technology Stack Profiling (CMS, theme, modules, JS libraries, server, CDN)

Built by

15+ years of PrestaShop expertise behind every check. We optimize stores on any platform.

Zulien

PrestaShop specialists & e-commerce solutions. Helping merchants optimize their stores since 2010.

Inger Technologies

Full-service e-commerce development & consulting. Expert audits and optimization for any platform.

Want a deeper audit?

Our experts manually review your store, server setup, and codebase for issues no automated tool can catch.