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WordPress Child Theme Generator

Extension Child Theme
— free, instant, no coding

Generate a fully-working Extension child theme instantly — free, with no coding required. Customize the name, author, colors and CSS, then download a ready-to-install ZIP.

Generate Extension Child Theme →

Free forever. No signup. ZIP downloads in 2 seconds.

Extension WordPress theme preview
800+
Active installs
v1.1.0
Latest version
June 4, 2025
Last updated
5.0 / 5
2 ratings

About Extension

Extension is a WordPress theme exclusively built for blogger, news and education. It is clean, super flexible, fully responsive designs, amazing new features, complete 1-click website demos and lifetime free updates. Extension design can be used for any type of website. This theme is compatible with Gutenberg and Elementor. It has 5 header design available at free. Select any header design which is suitable for your projects. All the demo displayed in below is using Elementor and Gutenberg. It consists Contact Us Template and Gallery Template, Popular Posts widgets and Sidebar. Get free support at https://tickets.themefreesia.com/ and View free demo sites at https://demo.themefreesia.com/extension/ , https://demo.themefreesia.com/gutenberg/ , https://demo.themefreesia.com/extension-app/ , https://demo.themefreesia.com/extension-education/ and https://demo.themefreesia.com/extension-construction/

By Theme Freesia. Theme homepage ↗

Why use a child theme for Extension?

Every time Extension ships an update, any direct edits you made to its files are overwritten. A child theme isolates your changes — custom CSS, template overrides, additional functions — so the parent can update freely while your customizations stay intact.

  • Survive Extension updates without losing your edits.
  • Override any Extension template file by copying it into the child.
  • Add custom hooks, shortcodes, or enqueue your own scripts.
  • Roll back to the parent at any time by deactivating the child.

How to install your Extension child theme

  1. 1

    Configure and generate

    Open the generator (already pre-filled with Extension as the parent), enter your child theme name and any custom CSS.

  2. 2

    Download the ZIP

    The generator builds a ready-to-install ZIP containing style.css, functions.php, screenshot.png and README.txt.

  3. 3

    Upload to WordPress

    In WordPress: Appearance → Themes → Add New → Upload Theme. Choose the ZIP, click Install Now, then Activate. Make sure Extension itself is also installed (the parent must be present).

Ready for your Extension child theme?

No signup. No paywall. Generated and downloaded in 2 seconds.

Generate Extension Child Theme

Frequently asked questions

What is a Extension child theme? +

A child theme is a separate WordPress theme that inherits all functionality, design, and templates from Extension (its parent). You make your customizations in the child so they survive updates to the parent theme.

Do I need to know code to use this generator? +

No. The generator creates a complete, valid Extension child theme with style.css, functions.php, screenshot.png, and README.txt. You can customize via the form fields, and if you want to add custom CSS or PHP later you can edit the files directly.

Will the child theme break when Extension updates? +

That's exactly what a child theme is designed to prevent. Extension can be updated freely without losing your customizations, because they live in the child theme files.

Is this generator really free? +

Yes. There is no signup, no payment, and no limit on how many Extension child themes you can generate. The zip is built on demand and downloaded directly to you.