How to remove unused css in wordpress

Last Updated: Jan 27, 2024 by

As a website owner, you want your website to be as efficient as possible. This includes having clean code that is optimized for speed and performance. One way to achieve this is by removing unused CSS from your WordPress website. In this article, we will discuss the importance of removing unused CSS and provide a step-by-step guide on how to do it.

Why Remove Unused CSS?

Unused CSS, also known as dead code, is code that is no longer being used on your website. This can happen when you switch themes, plugins, or make changes to your website’s design. Having unused CSS on your website can slow down your website’s loading speed and affect its performance. It can also make it difficult for search engines to crawl and index your website, which can negatively impact your SEO efforts.

How to Identify Unused CSS

Before you can remove unused CSS, you need to identify which CSS is not being used on your website. There are several tools available that can help you with this process. One popular tool is the “Coverage” tab in Google Chrome’s Developer Tools. This tool will show you which CSS files are being used and which ones are not. Another option is to use a plugin such as WP Asset Clean Up, which will scan your website and identify unused CSS files.

Removing Unused CSS Manually

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Once you have identified the unused CSS on your website, you can remove it manually. This involves going through your website’s code and deleting the unused CSS. This can be a time-consuming process, especially if you have a large website with a lot of CSS files. However, it is the most effective way to ensure that all unused CSS is removed from your website.

Using a Plugin

If you are not comfortable editing code or have a large website, using a plugin to remove unused CSS may be a better option for you. There are several plugins available that can help you with this task, such as WP Rocket and Perfmatters. These plugins will automatically remove unused CSS from your website, making the process much easier and faster.

Code Efficiency

Removing unused CSS not only improves your website’s performance, but it also makes your code more efficient. This is because your website will only load the necessary CSS files, reducing the amount of code that needs to be processed. This can result in faster loading times and a better user experience for your visitors.

Regular Maintenance

It is important to regularly check for and remove unused CSS from your website. As you make changes to your website, new unused CSS may be created. By regularly checking and removing it, you can ensure that your website remains optimized and efficient.


Having clean and efficient code is crucial for the success of your website. By removing unused CSS, you can improve your website’s performance and make it easier for search engines to crawl and index your website. Whether you choose to do it manually or use a plugin, regularly removing unused CSS should be a part of your website maintenance routine. Have you tried removing unused CSS from your website? Let us know in the comments.

Moadood Ahmad

About the Author: Moadood Ahmad

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