RankSnap SEO — On-Page SEO, Schema & Core Web Vitals Inspector

Instant on-page SEO, Schema structured data & Core Web Vitals inspector. 100% free, fast, and privacy-focused audit utility.

RankSnap is a fast, lightweight, and 100% free on-page SEO analyzer, schema inspector, and Core Web Vitals diagnostic tool designed for web developers, SEO specialists, digital marketers, and content creators. Audit any webpage in under 150ms with zero accounts, zero subscriptions, and zero tracking. ━━━━━━━━━━━━━━━━━━━━ ⚡ KEY FEATURES & CAPABILITIES ━━━━━━━━━━━━━━━━━━━━ 🔍 1. Complete On-Page SEO Audit • Page Title & Meta Description: Instant character count and length validation (optimal length warnings). • Canonical URL Check: Detects canonical tags and flags mismatches with the active URL. • Indexability & Robots Directives: Live check for robots meta tags (index, noindex, follow, nofollow). • Open Graph & Social Cards: Preview social sharing metadata (og:title, og:description, og:image, and Twitter Cards). 🌳 2. Visual Heading Hierarchy (H1 - H6) • Complete Heading Tree: View every heading in its exact order of appearance. • Structure Validation: Instantly flags missing H1 tags, duplicate H1 tags, and skipped heading levels (e.g., H1 directly to H3). • Clean visual indicators for semantic heading structure and readability. 🏷️ 3. Structured Data & Schema Validator • JSON-LD Detector: Finds and extracts all structured data scripts on the page. • Schema Type Validation: Identifies Organization, BreadcrumbList, Article, Product, FAQPage, and more. • Syntax Checker: Detects formatting errors, missing required properties, and malformed JSON. ⚡ 4. Live Core Web Vitals & Speed Metrics • Largest Contentful Paint (LCP): Measures main content loading speed with real-time pass/warning thresholds. • Cumulative Layout Shift (CLS): Audits visual stability to identify unexpected layout shifts. • TTFB & DOM Timers: Displays Time to First Byte and DOM Content Loaded benchmarks directly from browser performance observers. 🖼️ 5. Media & Link Health • Image Audit: Scrapes all images and flags elements missing descriptive alt attributes. • Link Overview: Distinguishes internal links from external outbound links and counts nofollow attributes. 📋 6. One-Click Markdown Summary • Copy a full, formatted SEO audit report to your clipboard formatted in Markdown—ready to paste into client emails, Slack, Notion, or task tickets. ━━━━━━━━━━━━━━━━━━━━ 🔒 PRIVACY-FIRST & ZERO BLOAT ━━━━━━━━━━━━━━━━━━━━ • 100% Free Forever: No paywalls, no tier restrictions, and no hidden subscriptions. • No Account Required: Install and inspect any page immediately. • Privacy Friendly: Runs entirely locally in your browser. We do not track browsing history, log visited pages, or collect personal information. • Minimal Permissions: Operates strictly on user click via the activeTab permission without background scanning.