The Child Theme Wizard lets you create a new child theme without the need for additional tools, right from within the WordPress admin interface. Once activated you can find it under Tools – Child Theme Wizard.
Specify a parent theme, customise options such as title and description and click Create Child Theme. Upon success you will find your new theme under Appearance – Themes.
You have the option to include GPL License Terms if you wish. The Wizard will automatically create a thumbnail too.
To find out more about child themes and why they are useful, please read the WordPress Developer Docs on Child Themes.
Screenshots
Create a Child Theme with just one click.
The wizard completed successfully.
Your new child theme appears under Appearance - Themes with a thumbnail.