SEO Analyzer

EO Analyzer gives you a complete, instant SEO audit of any web page — directly in your browser. No account, no external service, no data sent anywhere. 100% local and private. 🔍 WHAT IT DOES Click the icon or open the side panel to get a detailed SEO report covering 45+ checks across 6 categories: ✅ On-Page SEO (25% weight) • Title tag presence and optimal length (50-60 characters) • Meta description presence and length (150-160 characters) • H1 tag count and heading hierarchy (H1→H2→H3) • Image alt attributes • Clean URL structure • HTML lang attribute • Internal linking ✅ Technical SEO (20% weight) • HTTPS detection • Viewport meta tag • Robots meta (noindex check) • Canonical URL validation (self-referencing) • Structured data (JSON-LD) detection • Favicon presence • Hreflang tags for multilingual sites • Resource count optimization ✅ Content Analysis (20% weight) • Word count (300+ recommended) • Flesch readability score • Keyword density and stuffing detection • Text-to-HTML ratio • Paragraph and sentence length ✅ Social & Meta (10% weight) • Open Graph tags (og:title, og:description, og:image, og:type, og:url) • Twitter Card tags • Live social media preview card ✅ Links Analysis (15% weight) • Internal and external link detection • Broken link identification (javascript:void, empty #) • Nofollow ratio analysis • Anchor text quality • Outbound domain diversity ✅ Accessibility (10% weight) • Semantic HTML (<main>, <article>, <nav>) • Form label coverage • ARIA landmarks • Skip navigation link • Image alt attribute handling (informative vs decorative) 📊 FEATURES • Overall score with weighted calculation (0-100) • Color-coded results: green (80+), orange (50-79), red (<50) • Expandable check cards with descriptions and recommendations • Side panel for full detailed report • Popup for quick score overview • Export as plain text or JSON • Content statistics: word count, Flesch score, top keywords with density • Social media preview card (Facebook/Twitter) • Links summary with outbound domains list 🌐 BILINGUAL • Full French and English interface • Automatically adapts to your browser language 🔒 PRIVACY-FIRST • Zero data collection — everything runs locally • No external API calls • No analytics or tracking • No ads • Open source ⚡ HOW TO USE 1. Navigate to any web page 2. Click the SEO Analyzer icon for a quick score 3. Click "Full report" to open the side panel 4. Review checks, fix issues, re-analyze Perfect for SEO professionals, web developers, content creators, digital marketers, and anyone who wants to improve their website's search engine visibility.