The Beginner's Guide to Creating a WordPress Child Theme

If you're a WordPress user, you've probably heard of child themes. But do you know what they are, or why it's beneficial to create one for your website? In this blog article, we'll take a look at the concept of child themes in WordPress, outlining the advantages of making use of one for your site.

Introduced with version 2.7 of WordPress in December 2008, child themes have emerged as a great tool for customizing and securing websites without touching the code of the parent theme. By setting up a child theme, you can make modifications to how it looks and works without running the risk of disrupting any other parts of your site. It also allows customizations that you make on your site remain intact when an update occurs on the main theme.

What is the definition of a Child Theme?

A child theme in WordPress is a sub-theme that inherits the functionality and styling of its parent theme, while allowing users to modify or add additional features such as styles, functions, templates. Unlike its parent theme, changes made to a child theme will not be overwritten when the parent is updated.

In order to create a child theme, the first step is to select an existing parent theme that you would like your website to be based on. From there, you will need to develop a new file and folder structure within it in order to customize the appearance and performance of your site.

Once activated, this child theme will inherit any code or style from its parent but can also be modified so that any changes made are exclusive only to it; thus allowing for customization without directly having an impact on the core design of the original parent theme.

Why Should You Consider Creating a Child Theme in WordPress?

There are several reasons why you might want to create a child theme in WordPress:


Creating a child theme in WordPress can be an easy way to customize your website and make it unique. With a child theme, you can modify the design or functionality of your site without affecting the parent theme. This means that if you update the parent theme, any changes made through your child them will remain intact.

Additionally, customizing with a child theme eliminates any risks of breaking code as it does not require directly modifying the source code of the main template. As such, creating a WordPress Child Theme is an ideal option for keeping customization safe when updating templates for use on your site.


When you modify the code of a parent theme or third-party plugin, it can open up potential security vulnerabilities on your website. This is because if you're not familiar with that particular codebase, bugs and other issues could be inadvertently introduced.

To avoid these risks, using a child theme is preferred as it allows for customizations to the design and functionality without altering the original code of either. Doing so helps keep your website more secure by preventing any possible security problems from arising.

Furthermore, using a child theme will also allow for easy updating of both parent themes and plugins without affecting any changes made during customization stages before. This ensures that all new patches and updates related to security are applied quickly which again boosts its overall protection capabilities.

Update Compatibility

If the parent theme is updated, any customizations you've made to its code will be lost. By using a child theme, your customizations will remain in place even if the parent theme is updated.

This is very important, but even more experienced WordPress users often make the same mistake. Many of my customers make the mistake of modifying the original code of their WordPress themes or plugins as a quick fix for a problem, rather than finding a more sustainable solution. They have made custom code changes to the original files of their WordPress plugins, but they are hesitant to update those plugins to the latest version. This is because they are concerned that their modifications will be overwritten or that the update will break their website. Furthermore, they often don't remember the specific details of the modifications they made, or why they made them in the first place.

It is generally not recommended to modify the original files of WordPress themes or plugins.

This is because changes to the original code can be lost when the theme or plugin is updated, and it can also introduce vulnerabilities or other issues into your website's codebase.

This can be a frustrating and time-consuming problem for website owners, as it can prevent them from taking advantage of new features and security updates in their plugins. It can also make it difficult to troubleshoot any issues that may arise on their website.

One way to avoid this problem is to use a child theme to make customizations to your WordPress website. A child theme allows you to make customizations without modifying the original code of the parent theme or third-party plugins. This means you can update those themes and plugins without worrying about losing your customizations or breaking your website. Using a child theme also helps you keep track of your customizations and makes it easier to troubleshoot any issues that may arise.

How to Create a WordPress Child Theme?

There are three main ways to create a child theme in WordPress: using FTP or using an additional plugin. Here are the steps for each method:

Creating a Child Theme Using FTP

If you are new to web development, creating a child theme may be a bit more challenging. However, if you are familiar with using an FTP client, the process should be relatively straightforward. An FTP client is a software application that allows you to transfer files between your computer and a web server, which can be helpful when uploading the files for your child theme.

  1. Connect to your website's server using an FTP client (such as FileZilla).
  2. Navigate to the "wp-content/themes" folder in your website's file structure.
  3. Create a new folder for your child theme. The folder name should be unique and should reflect the name of your child theme.
  4. In the child theme folder, create a new file called style.css and open it in a text editor and add the following code to the top:
Theme Name: My Child Theme
Description: My custom child theme for WordPress
Author: John Doe
Template: twentytwentyone
  1. Replace "My Child Theme" with the name of your child theme, "My custom child theme for WordPress" with a description of your child theme, and "John Doe" with your name.
  2. Replace "twentytwentyone" with the folder name of the parent theme that you want to use as the base for your child theme.
  3. Save the style.css file and close it.
  4. In the child theme folder, create a new file called functions.php and open it in a text editor and add the following code:
add_action( 'wp_enqueue_scripts', 'enqueue_parent_styles' );
function enqueue_parent_styles() {
wp_enqueue_style( 'parent-style', get_template_directory_uri().'/style.css' );
  1. Save the functions.php file and close it.
  2. Your child theme is now ready to use. You can activate it from the WordPress dashboard by going to "Appearance > Themes" and selecting your child theme.

Generate a Child Theme Using Child Theme Configurator plugin:

The Child Theme Configurator plugin is a useful tool for WordPress users who want to create a child theme but are not familiar with programming. It provides an easy-to-use interface that allows you to create a child theme without having to manually create and edit theme files using FTP or a text editor.

Child Theme Configurator

To use this plugin, follow the instructions below. If you need further clarification, you can watch the tutorial videos on the plugin developer's website.

  1. Install and activate the Child Theme Configurator plugin.
  2. Go to "Tools > Child Themes" in the WordPress dashboard.
  3. Select the parent theme that you want to use as the base for your child theme.
  4. Enter a name and description for your child theme and adjust the settings.
  5. Click the "Create NEW Child Theme" button.
  6. Your child theme is now ready to use. You can activate it from the WordPress dashboard by going to "Appearance > Themes" section.

Creating a Child Theme Using Online Generator

If you are unfamiliar with FTP or prefer not to install additional plugins, there is another option available for creating a child theme. This method is convenient because you don't have to manually create any files in the themes directory using FTP.

Child theme online generator

To create a child theme using the generator created, simply click on the provided link and complete the straightforward form. This process is quick and easy, and you can have your child theme ready to use in no time. The generator will take care of the rest, generating a child theme for you based on the information you provide in the form.

All you need to do is enter the child theme name and parent theme slug. Then, you can download a ZIP package containing your child theme directory and install it just like any other WordPress theme:

  1. Navigate to the "Appearance" section in the left-hand menu and click on the "Themes" option.
  2. On the "Themes" page, click the "Add New" button at the top. This will bring up a page with a "Upload Theme" button. Click on this button and select the ZIP file with the child theme you generated.
  3. Click the "Install Now" button to start the installation process. Once the theme has been installed, you will see a confirmation message. Then, click "Activate" to use the new child theme.
Add theme
The "Appearance" section in the WordPress admin dashboard is where you can install both regular and child themes.

Common issues when using a child theme

Using a child theme in WordPress is a great way to make customizations to a theme without affecting its core files. While it is a useful tool, there are some common issues that users can face when using a child theme. In this section of article, we will discuss some of the common issues when using a child theme in WordPress.

Incorrect File Structure

One of the common issues when using a child theme is having an incorrect file structure. To create a child theme, you need to create a new directory in the themes folder of your WordPress installation, and within this directory, you need to create a stylesheet and functions file. If the file structure is incorrect, the child theme may not work properly.

Compatibility Issues

One of the biggest advantages of using a child theme is that you can update the parent theme without losing your customizations. However, when the parent theme is updated, it may break the child theme's functionality. It is important to test the child theme after the parent theme is updated and make any necessary changes.

Another common issue with child themes is compatibility issues. If the parent theme is not updated regularly or is not coded correctly, it may not be compatible with the child theme. This can lead to conflicts and errors that can cause the website to break or not function correctly.

Slow Website Performance

Using a child theme can slow down the website's performance if the code is not optimized. This is because the website has to load both the parent theme and the child theme. It is important to optimize the code and reduce the number of unnecessary files to improve the website's performance.


I hope that the instructions provided in this article have been helpful and that you will now consider using child themes to make customizations to your website. Child themes are a great tool for customizing and securing your site without altering the parent theme's code.

As demonstrated, using child themes is not a difficult or time-consuming process. In fact, it can save time and effort in the long run by allowing you to make customizations to your website without directly modifying the code of the parent theme or risking the integrity of your site.

Overall, incorporating child themes into your workflow can make it easier and more efficient to make customizations to your website.

Avatar for Maciej BisAbout Maciej Bis

Maciej has over 10 years of WordPress expertise and is the author of Permalink Manager, a popular WordPress plugin for managing permalinks. He has extensive experience in WordPress programming and has worked with clients from all around the world.

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