Web Vitals

Tracking since Apr 5, 2026.

Changelog

• Apr 26, 2026
  description

  Web Vitals - Complete Website Performance, SEO & Infrastructure Analysis
  The most comprehensive Chrome extension for website analysis. Combines Google's official Web Vitals metrics with advanced SEO analysis, security scoring, server intelligence, and DNS diagnostics in one powerful tool.
  
  🚀 WHAT YOU GET
  
  Core Web Vitals Monitoring
  Real-time performance metrics (LCP, CLS, FCP, TTFB) plus field data from Chrome UX Report. Color-coded performance indicators show you instantly if a site passes Google's thresholds.
  
  🎯 SEO Analysis Tab (NEW)
  
  Comprehensive on-page SEO scoring that analyzes:
  SEO Score (0-100): Evaluates title tags, meta descriptions, heading structure, image alt text, canonical URLs, Open Graph, structured data, and security headers
  Domain Authority (0-100): Estimates domain strength based on TLD quality, HTTPS, security configuration, and domain characteristics
  Domain Rating (0-100): Assesses potential backlink quality and link profile strength
  Instant detection of SEO issues like missing meta tags, images without alt text, multiple H1s, security vulnerabilities, and more. All analysis happens locally in your browser—no page content transmitted.
  
  🌍 Server Intelligence
  
  Reveals hosting infrastructure: IP addresses, geographic location with coordinates, ISP details, ASN, and timezone. Essential for verifying CDN setup, local SEO audits, and infrastructure debugging.
  
  🔍 Complete DNS Analysis
  
  Shows all record types (A, AAAA, CNAME, MX, NS, TXT, SOA) in one view. Debug email delivery, verify domain ownership, check DNS propagation, and audit configurations without switching tools.
  
  💻 Tech Stack Detection (NEW)
  
  Automatically identifies:
  CMS & frameworks (WordPress, React, Vue, Next.js)
  Server technologies (Nginx, Apache, Node.js)
  Analytics tools (Google Analytics, Hotjar)
  Font providers and libraries
  
  ♿ Accessibility Audit (NEW)
  
  WCAG compliance checking with:
  A11y Score (0-100)
  WCAG level estimation (A, AA, AAA)
  Detailed issue detection by category
  Good practices recognition
  
  🎨 MODERN UI FEATURES
  
  Dark/Light Mode: Toggle between themes with your preference saved automatically
  Six Powerful Tabs: Web Vitals, Server Info, DNS, SEO, Tech Stack, Accessibility
  Clean Design: Minimalist interface inspired by shadcn design principles
  Fast & Responsive: Lazy loading ensures data is fetched only when needed
  
  💡 WHY THIS EXTENSION
  
  Built for Professionals
  Developers get performance and SEO metrics alongside technical details. SEO specialists can audit sites instantly. System administrators verify DNS and hosting in seconds. All without leaving your browser.
  
  Privacy-First Design
  Zero tracking, no data collection. API calls only when you request them. Uses free public APIs (Mozilla Observatory for security, ipwhois.app for geolocation, and Google DNS) with HTTPS-only connections. All SEO analysis happens locally—only domain names are sent to APIs, never your page content.
  
  No Paid APIs Required
  100% free to use. No API keys needed from Moz, Ahrefs, or SEMrush. Unlimited usage with smart local algorithms inspired by professional SEO tools.
  
  🔧 TECHNICAL FEATURES
  
  Smart Analysis:
  Lazy loading: Fetches data only when needed
  Local SEO scoring: Domain Authority and Rating calculated in-browser
  Parallel API queries: Results in 2-3 seconds
  Non-blocking architecture: UI stays responsive
  Modern tabbed interface with persistent dark mode preference
  Visual Indicators:
  
  Animated circular score indicators
  Color-coded status (Green ≥70, Orange 40-69, Red <40)
  Issue detection with actionable recommendations
  Length indicators for title and meta description optimization
  Original Features Preserved:
  All Google Web Vitals Extension features: ambient badge indicators, console logging, HUD overlay, and Chrome UX Report integration.
  
  👥 WHO USES THIS
  
  SEO Specialists: Instant audits of on-page optimization and security headers
  Web Developers: Debug performance while checking SEO implementation
  DevOps Engineers: Verify infrastructure and security configurations
  Digital Marketers: Quick site analysis during competitor research
  Content Creators: Ensure pages meet SEO best practices before publishing
  System Administrators: DNS and server infrastructure verification
  
  📊 SEO SCORING METHODOLOGY
  
  SEO Score Factors (100 points total):
  Optimized title (30-60 chars) - 10 pts
  Meta description (120-160 chars) - 10 pts
  Single H1 tag - 8 pts
  Images with alt text - 8 pts
  Canonical URL - 4 pts
  Mobile viewport - 4 pts
  Language & charset - 8 pts
  Open Graph tags - 8 pts
  Structured data - 8 pts
  Internal links - 4 pts
  Robots compliance - 4 pts
  HTTPS, HSTS, CSP - 12 pts
  Content quality (word count, headings) - bonus points
  Domain Authority (0-100 estimated):
  Based on HTTPS status, TLD quality (.gov/.edu score highest), domain length (shorter = older/premium), security configuration, and recognized brand status.
  
  Domain Rating (0-100 estimated):
  Focuses on backlink potential through domain quality indicators: security strength, TLD premium status, name characteristics (no hyphens/numbers scores higher).
  
  🔒 TRANSPARENCY
  
  What We Don't Do:
  Query real backlink databases (requires paid APIs)
  Verify actual domain age via WHOIS
  Count real backlinks (requires crawler infrastructure)
  Track your browsing or collect personal data
  What We Do:
  
  Provide smart estimations based on verifiable factors
  Combine on-page analysis with domain characteristics
  Use algorithms inspired by Moz DA and Ahrefs DR
  Offer instant insights for quick audits and reports
  
  🚀 INSTALLATION & USAGE
  
  Install from Chrome Web Store
  Navigate to any website
  Click the extension icon
  Switch between tabs to analyze different aspects
  No configuration required. No API keys needed. Just install and analyze.
  
  📝 OPEN SOURCE
  
  Enhanced fork of Google's official Web Vitals Extension with 5 additional analysis tabs:
  SEO Analysis with scoring
  Server & Hosting Intelligence
  Complete DNS Records
  Technology Stack Detection
  Accessibility Audit
  GitHub: VANTAGhq/web-vitals-extension
  Maintained by: vantag.es

  Web Vitals Extension — Complete website analysis in a single popup.
  Measure Core Web Vitals, run SEO audits, check accessibility, inspect server and DNS details, and detect the technology stack of any website. All analysis runs locally in your browser.
  
  WEB VITALS
  Real-time LCP, CLS, INP, FCP and TTFB metrics with color-coded ratings (good / needs improvement / poor). Comparison against real-user field data from the Chrome UX Report (CrUX) and specific fix suggestions for every metric that fails its threshold.
  
  SERVER INFO
  IP address, geolocation (country, region, city), ISP, organization, ASN, timezone and hostname.
  
  DNS INFO
  A, AAAA, MX, NS, TXT, SOA and CNAME records via Google Public DNS. Subdomain discovery when available.
  
  SEO
  SEO score 0-100 based on title, meta description, headings, images, structured data, Open Graph and security headers. Domain Authority and Domain Rating estimations. Content analysis: word count, heading structure, alt text, internal and external links. Actionable fix suggestions for every issue found.
  
  TECH STACK
  Automatic detection of CMS and SSGs (WordPress, Next.js, Hugo, etc.), server software (Nginx, Apache), JavaScript frameworks, libraries, analytics and marketing tools, and font providers.
  
  ACCESSIBILITY (A11Y)
  0-100 score with estimated WCAG compliance level (A, AA, AAA). Detects missing alt text, empty links and buttons, unlabeled form inputs, skipped heading levels, missing landmarks and positive tabindex values. Every issue includes a clear recommendation.
  
  EXTRA FEATURES
  .- Report export: one-click Markdown export with data from all tabs.
  .- Dark and light mode: preference saved across sessions.
  .- Side Panel: open the extension in Chrome's side panel (Chrome 114+ required).
  
  PRIVACY
  All analysis runs locally. Metrics are fetched from public APIs only (CrUX, ipwhois.app, Google Public DNS, Mozilla HTTP Observatory, RDAP.org). No personal data, browsing history or metrics are sent to servers owned by the extension authors. The extension does not track you or collect analytics.
  
  WHO IT'S FOR
  Web developers, SEO professionals, system administrators and anyone who wants to understand the performance, accessibility and infrastructure of a website in seconds.
  
  Maintained by vantag.es

• Apr 26, 2026
  permissions

  tabs, storage, activeTab, scripting, webRequest

  tabs, storage, activeTab, scripting, webRequest, sidePanel

Permissions & access

Permissions

tabsstorageactiveTabscriptingwebRequestsidePanel

Host access

*://*/*

Screenshots

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