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WordPress plugin

Theme Designer

Theme Designer is a powerful WordPress plugin that allows you to create and manage block themes (FSE themes) without writing a single line of code. It provides an intuitive interface to configure all theme settings that are typically defined in the theme.json file. Key Features Visual Theme Builder

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PricingFree downloadThe WordPress.org download is free. Pro versions, add-ons or external services may cost extra.

CompatibilityRequires WordPress 5.8 and PHP 7.0.

SourceWordPress plugins · Oct 26, 2026

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Accepted Payment Methods

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01 / Source details

Key Features

Visual Theme Builder : Create new themes with a simple form interface
Complete Settings Management : Configure all theme.json settings through an intuitive admin panel
Theme Metadata : Set theme name, description, author, version, and other metadata
Screenshot Management : Upload and manage theme screenshots
Color Palettes : Define custom color palettes and gradients
Typography Settings : Configure font families, sizes, and fluid typography
Spacing & Layout : Set up spacing scales, layout sizes, and user controls
Border & Shadow : Define border styles, radius, and shadow presets
Background Controls : Configure background image and positioning options
Theme Export : Download your themes as installable ZIP files
Theme Duplication : Easily duplicate existing themes as starting points
WordPress Defaults : Choose to include or exclude WordPress default settings

What Gets Created

When you create a theme with Theme Designer, it automatically generates:

Theme Directory Structure : Complete theme folder with all necessary files
style.css : Theme header with all metadata
theme.json : Complete configuration file with all your settings
Templates : Basic index.html template for the main content area
Template Parts : header.html and footer.html parts for site structure

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Back to WordPress plugins

Can I use this plugin to create themes for distribution?

Yes! Themes created with Theme Designer are fully compatible with WordPress and can be distributed, sold, or shared. The plugin creates standard WordPress themes that work exactly like any other block theme.

What happens to my themes if I deactivate the plugin?

Your themes remain completely intact. The plugin only helps you create and manage themes – once created, they are independent WordPress themes that will continue to work even if the plugin is deactivated.

Can I edit existing themes with this plugin?

Yes, you can edit any theme that was created with Theme Designer. The plugin tracks themes it has created and allows you to modify their settings through the same interface. To avoid data loss, it is currently not possible to edit themes that were not created with Theme Designer.

Does this plugin support all theme.json features?

The plugin supports all the major settings sections of theme.json including colors, typography, spacing, layout, borders, shadows, and more. It focuses on the settings that are most commonly used and provides a user-friendly interface for them. However, the sections “styles”, “customTemplates” and “templateParts” of theme.json are not currently supported.

Can I use custom CSS with themes created by this plugin?

Yes, you can add custom CSS through the WordPress Site Editor.

Since the plugin creates standard WordPress block themes, it’s also possible to edit the theme files directly. However, it’s strongly recommended not to use the style.css file but rather a separate CSS file for styles, as the Theme Designer currently completely overwrites the styles.css file each time changes are made.

Is there a limit to how many themes I can create?

No, there’s no limit. You can create as many themes as you want, limited only by your server’s storage capacity.

Can I import existing themes?

Yes! You can simply install a theme the usual way. If it was created with the Theme Designer, it will be automatically recognized and you can edit it with the Theme Designer again.

What file formats are supported for theme screenshots?

The plugin supports PNG, JPG, and GIF formats for theme screenshots. Although all three formats are supported by WordPress, WordPress officially recommends the PNG format. The recommended size is 1200×900 pixels.

Can I export themes to share with others?

Yes! The plugin includes an export feature that creates a standard WordPress theme ZIP file that can be installed on any WordPress site. And if you have the Theme Designer installed there as well, you can continue editing the theme there.

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Key Features

What Gets Created