Eliminate render-blocking resources
Learn about the render-blocking-resources audit.
Properly size images
Learn about the uses-responsive-images audit.
Defer offscreen images
Learn about the offscreen-images audit.
Learn about the unminified-css audit.
Remove unused CSS
Learn about the unused-css-rules audit.
Efficiently encode images
Learn about the uses-optimized-images audit.
Serve images in modern formats
Learn about the uses-webp-images audit.
Enable text compression
Learn about how enabling text compression can improve your webpage load performance.
Preconnect to required origins
Learn about the uses-rel-preconnect audit.
Reduce server response times (TTFB)
Learn about the time-to-first-byte audit.
Avoid multiple page redirects
Learn why page redirects slow down your web page's load speed and how to avoid them.
Preload key requests
Learn about the uses-rel-preload audit.
Use video formats for animated content
Learn about the efficient-animated-content audit.
Reduce the impact of third-party code
Learn how third-party code, like advertising networks and analytics services, affects page load performance, and how you can optimize third-party code.
Avoid non-composited animations
How to pass the "Avoid non-composited animations" Lighthouse audit.
Lazy load third-party resources with facades
Learn about the opportunities to lazy load third-party resources with facades.