SEO Auditor

SEO Auditor — On-Page SEO Audit Tool, SEO Analyzer, SEO Checker ✅ Instant SEO Audit. Full Analysis. Zero Guesswork. SEO auditor is your powerful all-in-one Chrome extension that provides deep, structured, and real-time SEO audits directly on any webpage — fully client-side, privacy-friendly, fast, and actionable. Whether you're a website owner, SEO consultant, developer, marketer, or agency — SEO Analyzer empowers you to optimize your pages effortlessly with scientific, well-structured insights. 🚀 Key Features At a Glance: ✅ LLM SEO (AI Mentions Improvers) - llms.txt existence checker - llms-full.txt existence checker ✅ Meta Tag Analyzer - Analyze & validate all critical meta tags - Title tag length checker with Google-recommended limits - Meta description length checker with recommendations - Canonical tag existence and correctness - Robots meta tag (robots + x-robots-tag) parsing - Open Graph (og:) and Twitter Card tag validation - JSON-LD structured data extraction and display - Viewport and charset tag validation - Language attribute (html lang) detection - Favicon existence check ✅ Advanced Headings Structure Audit - Fully hierarchical breakdown: H1, H2, H3, H4, H5, H6 counts - Detect missing or multiple H1 tags - Highlight heading depth structure for semantic optimization - Identify hierarchy problems visually ✅ Image Optimization Audit - Full image listing with and without alt attributes - Detect accessibility issues from missing alt tags - Identify images missing srcset attributes for responsive design - Review image source URLs directly ✅ Link Analysis (Internal & External) - Total link count with full breakdown - Internal vs external link categorization - nofollow and target="_blank" attribute detection - Unique URL counts - Anchor text audits: empty text, short text flags - Full clickable list of all links with attributes ✅ Indexability & Crawlability Audit - Analyze indexability based on robots meta tags - Fetch and display robots.txt (when permissions allow) - Fetch and parse sitemap.xml file (when available) - Check if the current page is included in sitemap ✅ Accessibility Signals - HTML lang attribute detection - Alt attribute coverage on images - Semantic heading structure - Missing metadata flags for accessibility ✅ Content Depth Analysis - Word count calculation - Character count calculation - Flagging thin content when pages have too few words ✅ Technical SEO Checks - Charset detection - Viewport tag presence for mobile responsiveness - Structured data (JSON-LD) inspection with inline viewer - Open Graph and social metadata completeness ✅ Full Audit Scoring & Suggestions - Live audit scoring for each analyzed section - Highlight warnings, opportunities, and errors - Simple color-coded icons: ✅ good, ⚠ warning, ❌ error - Detailed explanations and helpful tooltips for every issue - Embedded links to official documentation from: - - Google Search Central - - Web.dev - - W3C - - Schema.org - - Mozilla MDN ✅ Modern Lighthouse-style Design - Visually organized tabs: - - Overview - - Meta - - Indexing - - Headings - - Images - - Links - - Accessibility - - Tools - Smooth navigation and drilldowns into specific issues - Full sub-tab navigation for drilldowns on images and links ✅ Exportable & Shareable Export full audit reports (coming soon) Copy audit blocks directly for reports or clients ✅ SEO External Tools Integration Quick links to: - W3.org HTML Schema Validator - Google Mobile-Friendly Test - Google Rich Results Test - Google PageSpeed Insights - Prevue Open Graph Preview ✅ Privacy-First & Offline-First - No servers involved - Full analysis happens 100% locally in your browser - No data sent externally - No signup required - Zero tracking - Fully GDPR & CCPA friendly ✅ Zero Setup Required - No configuration needed - Works out-of-the-box on any webpage ✅ Who Is This For? - SEO Specialists & Consultants - Web Developers - Digital Marketing Agencies - E-commerce Managers - SaaS Businesses - Bloggers & Content Creators - UX & Accessibility Auditors 🔥 Why SEO Analyzer is Different: - 100% Instant Audit — one click, fully automatic - No third-party servers — your data stays secure - Professional-grade audit detail — designed for both experts & beginners - Ultra-fast — analysis completed in under 1 second - Google-compliant audits — based on official SEO guidelines - Beautiful, clean, and highly readable UI 🔧 Technical Details: - Chrome Manifest v3 Compliant - Lightweight — minimal permissions required - No background tracking - Compatible with latest versions of Chrome, Brave, Edge, and Chromium-based browsers 🌎 SEO Analyzer Web App (also available) Don’t want to install a Chrome extension? - Use our fully standalone SEO Analyzer Web App — with the same full audit experience right in your browser without installation. 📈 Grow your SEO confidence. - Whether you're launching a new website, optimizing your existing pages, running an SEO audit for your clients, or troubleshooting complex SEO issues — SEO Analyzer is your perfect companion. 🔒 100% Privacy First. 100% Transparent. - We do not store, track, or collect any of your data. - All audits happen directly inside your browser. - SEO Auditor is fully open-source. Anyone can review, audit, and contribute to the project. Source code is available at https://github.com/plainsignal/seo-auditor