Method 1. Minify CSS/JavaScript in WordPress using WP Rocket

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Minify CSS/JavaScript in WordPress with WP Rocket
Minify CSS/JavaScript in WordPress using SiteGround
Minify CSS/JavaScript using Autoptimize
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This method is relatively simple and recommended for all users. It will work fine no matter what WordPress hosting you use.

First, you need to install and activate the WP Rocket plugin. For more details, check out our step-by-step guide on how to install a WordPress plugin.

WP Rocket is the best WordPress caching plugin on the market. It allows you to easily add caching to WordPress and significantly improve website speed and page load times.

For more details, see our tutorial on how to install and configure WP Rocket in WordPress.

Upon activation, you need to visit the WP Rocket settings page and switch to the “File Optimization” tab.

Minify CSS files in WP Rocket
From here you need to select the “Minify CSS files” option.

WP Rocket will show you a warning that this action may damage your site. Go ahead and click the “Enable CSS Minification” button. If this option causes problems for your site, you can disable it at any time.

Activate CSS minification
Next, you need to scroll down to the JavaScript files section.

Here, you just need to check the box next to the “Minimize JavaScript files” option.