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Lighthouse performance checklist

Below is a list of items that you can use to quickly audit the performance of your application. This list is not exhaustive, but rather a starting point.


Please remember that the Lighthouse score should be checked only on the production build.


  • Images have appropriate resolution
  • Images are in WebP format
  • Third part code is loaded asynchronously
  • Images are lazy loaded
  • All custom event listeners are destroyed with their components


  • All images are described by alt attribute
  • Contrast is correct
  • aria-label are added to HTML tags

Best Practices

  • https connection is used
  • Page follows a semantic HTML structure


  • robots.txt is added
  • All pages have metadata (title, description, tags)
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