Create a Child Theme With WordPress (3 Methods)

Child themes let you customize a WordPress site without losing your work every time the theme updates. 

They give you a safe place to change how a site looks or behaves, while the parent theme continues to receive updates in the background.

How often you actually need a child theme depends on the theme you’re using.

Some themes require one early on. Others, like Astra, are designed to handle most types of customization without touching code at all. 

If you’re changing your site’s appearance, Astra already has strong tools in place. 

If you’re changing structure or behavior, that’s where a child theme earns its keep.

Why Use a Child Theme

Are you planning to customize more than just colors? Are you editing theme code, adding templates or integrating custom scripts?

If your answer is yes, then a child theme is essential.

Here’s why:

• Parent theme updates won’t overwrite your changes: Your changes sit in the child theme while updates touch only the parent theme.
• All modifications are organized in one place: No hunting through theme files.
  Developers can easily spot changes: If you hire someone later, they see exactly what’s been customized.
• Great for learning and experimentation: Create variations without risking your live site.

If that sounds like overkill, ask yourself if you’ll eventually switch themes or update the current one.

If yes, then a child theme protects your site now and in the future.

Example: A small business using Astra wants a unique homepage layout. 

They start with the child theme and build welcome sections, custom CSS and functions in one place. 

Six months later they update Astra and nothing breaks. 

That’s the power of a child theme.

While child themes are useful for learning and experimenting, nothing comes close to the power of ZipWP for spinning up instant websites to learn, try new themes and plugins or prepare sites without impacting live.

Child Theme Prerequisites

Before you build anything, you’ll need:

• Access to your WordPress installation via FTP, SFTP, hosting file manager, or a file manager plugin.
• A code editor (even Notepad works) to edit CSS and PHP files.
• The exact name of the parent theme folder (important for linking).

Got those? Good. If not, pause here and get access sorted. 

You’re about to touch core theme files and mistakes are easier to fix when you start with proper access!

How To Create a WordPress Child Theme

This is where the magic happens. You’ll learn three methods, a child theme generator, plugin and the manual method. 

Method A: Use a Child Theme Generator

Some themes (like Astra) provide their own child theme generator. 

They let you specify author, screenshot, version and description before downloading a complete child theme package.

Here’s how it works:

Open the Astra Child Theme Generator

Enter a name, author and description

Click Generate

Upload the ZIP via Appearance > Themes > Add New

Activate the child theme

What you get:

• A correctly linked style.css
• A ready-to-use functions.php
• Proper enqueueing of parent and child styles
• A safe starting point that follows best practices

Think of it as a blank canvas that already knows how Astra works.

Method B: Use a Plugin

When you want speed and low risk, a plugin does most of the work for you. 

The Child Theme Configurator is a popular option.

Install and activate the plugin from Plugins > Add New

Go to the plugin menu (usually Tools > Child Themes)

Click the blue Analyze button

Select your parent theme from the dropdown

Tell it to use the Primary Stylesheet and WordPress style queue when prompted

Configure the name, description and whether to copy elements from the parent theme or not

Click Create New Child Theme

The plugin will generate the child theme folder and files for you. Then go to Appearance > Themes and activate it

This video by Adam Preiser walks you through creating a child theme:

Method C: Manually Create a Child Theme

If you’d rather create a child theme yourself, you can.

It takes longer than the Astra Child Theme Generator or a plugin but you’re in control of everything.

The easiest way to do this is via FTP/SFTP, Putty (SSH) or the file browser in your host’s control panel (cPanel or Plesk)

Not sure how to do that? Read one of the guides below:

• Want to use FTP/SFTP? Read this guide.
• Prefer SSH? Read this guide.
• File Manager and cPanel? Read this guide.
• File Manager with Plesk? Read this guide.

Create a new folder in wp-content/themes. Name it after your parent theme with -child appended. Example: astra-child.

Inside that folder create a file called style.css and add a header like:

/*
 Theme Name:   Astra Child
 Theme URI:	http://example.com/astra-child
 Description:  Astra Child Theme is an awesome theme.
 Author:   	Brainstorm Force
 Author URI:   https://www.wpastra.com
 Template: 	astra
 Version:  	1.0.0
 License:  	GNU General Public License v2 or later
 License URI:  http://www.gnu.org/licenses/gpl-2.0.html
 Tags:     	astra
 Text Domain:  astrachild
*/

Change details to match yours and save the file.

Then, upload the file to the astra-child folder you created earlier.

Next we need to create a functions.php file.

Navigate to Appearance > Theme Editor 

Create another new file called functions.php and paste in the code below.

<?php
add_action( 'wp_enqueue_scripts', 'my_theme_enqueue_styles' );
function my_theme_enqueue_styles() {
    wp_enqueue_style( ' astra-child', get_stylesheet_uri(),
        array( astra ), 
    );
}

Replace astra-child with your child theme name and array( astra ) with the parent theme name.

Upload the file to wp-content/themes. 

Note that unlike the style.css file (or any other file), the child theme version of functions.php doesn’t overwrite the parent. 

It reads the child file’s code and uses it instead of the same code in the parent file.

Once you’ve uploaded the files, open your WordPress admin panel and go to Appearance > Themes. 

Your new child theme should now be listed. Activate it.

Since we haven’t added any new code yet, the child theme will be exactly the same as its parent theme.

Customizing a Child Theme

Now your child theme is active, you’re free to experiment as much as you like with it.

You could:

• Add custom CSS in style.css and see changes live.
• Copy a template from the parent theme into the child folder and modify it.
• Add new functionality in functions.php like custom post type support.

Remember, the styles in your child theme will override parent theme styles when loaded after them.

For example, if the parent theme sets body text to 16px and you add this to style.css:

body { font-size: 18px; }

Your site will now use 18px text without ever touching the parent theme. That’s how simple it is!

Troubleshooting Common Issues

Even experienced builders trip over a couple of things:

• Child theme not listed in themes? Check the Template value in style.css. It must exactly match the parent folder name.
• Changes not showing up? Clear your browser cache, then verify your styles are loaded in the correct order.

Example: If you see parent theme styles overriding yours, inspect the order in the browser developer tools. 

The child theme must load after the parent.

Safely Overriding Astra Templates 

This is advanced territory, but it’s one of the reasons child themes still matter.

If you copy a template file from Astra’s parent theme into your child theme using the same folder structure, WordPress will load your version instead.

Use this carefully.

• Only override the file you truly need
• Comment your changes clearly
• Recheck overridden files after major Astra updates

Example: You want full control over the blog post layout beyond what hooks allow. Copy Astra’s single post template into your child theme and modify it. 

Updates won’t touch your version, but you stay responsible for keeping it compatible.

Looking Ahead

Even though many themes support block templates and theme.json customizations, a child theme is still the safest place to make serious edits.

If future WordPress features make child themes optional for certain cases, this strategy will still serve you well for controlled site customization.

Creating and Working With Child Themes

That about sums up child themes. As you have seen, they are easy to create and offer many benefits for website owners.

If you get frustrated when your changes are overwritten by a theme update or want to experiment with design without ruining your theme, you now know what to do!

Are you using a child theme? Which method do you use to make changes? Let us know in the comments!

Child Theme FAQs

Here are some common child theme questions and their answers: