Method 2. Minify CSS/JavaScript in WordPress using SiteGround

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WP Rocket minifies JavaScript files
A warning appears again stating that this action may damage the site. Click the "Enable JavaScript Minification" button.

So don’t forget to click shandong phone number on the “Save Changes” button to store your settings.

WP Rocket will start minifying CSS and JavaScript files. You can clear the cache in the plugin settings to ensure it starts using minified CSS and JavaScript for the next site visitor.

If you use SiteGround as your WordPress hosting provider, you can use SiteGround Optimizer to minify your CSS files.

SiteGround Optimizer is a performance optimization plugin that runs on its own platform. Works well with Ultrafast PHP to improve website loading times.

Simply install and activate the SiteGround Optimizer plugin on your WordPress website. For more details, see our step-by-step guide on how to install a WordPress plugin.

Next, you need to click on the SG Optimizer menu in your WordPress admin sidebar.

SG optimizer
This will take you to the SG Optimizer settings.

From here, you need to click on the “Go to frontend” button under “More Optimizations”.

SiteGround front-end optimization
On the next screen, you'll be able to manage the CSS frontend.

You need to activate the switch next to the "Minify CSS files" option.