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Resources

Web Performance
Tools

Web Performance Toolkit

A collection of tools and resources for measuring and improving web application performance.

Performance Measurement Tools

Performance Auditing Tools

Google Lighthouse

Open-source tool for auditing performance, accessibility, SEO, and best practices. Available in Chrome DevTools.

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PageSpeed Insights

Analyzes web pages and provides suggestions to make them faster on both mobile and desktop devices.

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WebPageTest

Free tool for testing website performance from multiple locations around the globe using real browsers.

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Network Analysis Tools

Chrome DevTools Network Tab

Built-in browser tool for analyzing network requests, timing, and resource loading.

Built into Chrome

HTTP Archive

Tracks how the web is built by analyzing millions of websites and providing insights.

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GTmetrix

Analyzes your site's speed performance and provides actionable recommendations.

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Image Optimization Tools

TinyPNG / TinyJPG

Compress PNG and JPEG images while maintaining quality. Reduces file size significantly.

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Squoosh

Google's image compression tool that lets you compare different formats and compression levels.

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ImageOptim

Mac app for optimizing images by removing metadata and compressing files.

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Code Optimization Tools

Webpack Bundle Analyzer

Visualize and analyze your webpack bundle to identify large dependencies.

npm package

UglifyJS / Terser

JavaScript minification tools that reduce file size by removing whitespace and optimizing code.

npm packages

PurgeCSS

Remove unused CSS from your project to reduce file size.

npm package

Real User Monitoring (RUM)

Google Analytics

Track real user performance metrics including page load times and user interactions.

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New Relic

Application performance monitoring tool that provides insights into user experience.

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Datadog

Cloud monitoring platform for applications, infrastructure, and logs.

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Performance Best Practices

  • Minimize HTTP requests by combining files
  • Enable browser caching with proper headers
  • Use CDN for static assets
  • Implement lazy loading for images and code
  • Minify CSS, JavaScript, and HTML
  • Optimize images (compress, use WebP format)
  • Use code splitting and tree shaking
  • Implement service workers for offline support
  • Monitor Core Web Vitals (LCP, FID, CLS)
  • Test performance regularly