Improve Lighthouse Scores: A Checklist

Performance

• Compress images (WebP, appropriate dimensions)
• Defer non-critical JavaScript
• Use CDN for static assets
• Enable caching headers
• Minimize third-party scripts

Accessibility

• All images have alt text
• Color contrast ratio 4.5:1 minimum
• Form inputs have associated labels
• Focus states visible on interactive elements

SEO

• Unique <title> and meta description per page
• One <h1> per page
• Semantic HTML (nav, main, article)