Best methods to reduce unused CSS in WordPress for better performance

Reducing unused CSS in WordPress improves performance by minimizing file sizes and speeding up page load times. Here are the best methods:

1. Use a Lightweight Theme – Choose well-optimized themes like GeneratePress, Astra, or Hello Elementor.
2. Optimize CSS with Plugins – Use plugins like WP Rocket, Asset CleanUp, or Perfmatters to unload unnecessary CSS per page.
3. Enable Critical CSS – Generate and inline only the CSS required for above-the-fold content using WP Rocket or Autoptimize.
4. Manually Remove Unused CSS – Use Chrome DevTools or PurifyCSS to identify and remove unnecessary styles.
5. Minify and Combine CSS – Use Autoptimize or Fast Velocity Minify to reduce file sizes.
6. Disable Unused Plugins – Deactivate plugins that add excessive stylesheets.
7. Use a CDN with CSS Optimization – Services like Cloudflare and BunnyCDN can optimize and cache CSS.
8. Load CSS Asynchronously – Defer non-critical stylesheets using the rel="preload" or media="print" technique.