ijmccallum

This theme demo / theme switcher plugin will add a bar to the top of your WordPress site listing every theme you have installed. It gives visitors the ability to switch between themes and try out their look on your live site.
After installation it requires no set up, it just works.
If you would like to see any extensions to this theme switcher please don’t hesitate to contact me from my website or post something in the support section. And, if you like it – please leave something nice in the review section! The more popular this becomes the more likely I’ll be to work on giving it lots more extra awesome.
<h4>Why another theme switcher?</h4>
I built this theme switcher primarily for myself. There are a number of other theme switchers out there but they all require visitors to click on a drop down menu then select a theme to demo or have some other complication and none of them had the clean, simple, minimal way of switching that I was hoping for in a theme switcher. So I built this theme switcher to give visitors an instant list of all the themes I hope to develop which they will be able to demo in a single click, also it doesn’t need any set up so it’s very easy!
So, I imagine most of the people interested in this theme switcher would be theme developers but if there are any people who are really indecisive about how they want their website to look, I guess this could provide them with an interesting solution to the website design problem. Let me know if you can think of any other uses for a theme switcher!

IJM Theme Switcher Bar

Add a theme switcher / theme demo bar to your site. Allows users to switch the theme they see on your site.

Jael Meire

Easy Dark Theme for Astra adds a light/dark mode switcher designed specifically for Astra themes.
Main features: 
* Toggle control mode: 
 * Auto (system preference) using prefers-color-scheme 
 * Button mode (user switch) 
 * Optional “Remember preference” (persists user choice) 
* Toggle placement options (floating): 
 * Bottom-right, bottom-left, top-right, top-left 
 * Horizontal and vertical spacing (positive values, automatically applied based on position) 
* Toggle visibility options: 
 * Always show, hide on mobile, hide on desktop, always hide 
* Toggle style options: 
 * Icon or Text 
 * Pill style: 
 * Capsule switch with sun/moon icons and animated knob 
* Optional theme transition: 
 * Smooth transition applied only while switching between themes 
* Multiple toggle outputs: 
 * Floating button (auto-injected) 
 * Widget 
 * Shortcode: [edta_toggle] 
 * Admin preview with live style switching 
* Optional Astra Global Colors mapping: 
 * Free Preset Palette (included, not editable) 
 * Custom Palette (fully editable) 
 * Dark palette always applied in dark mode 
 * Light palette can be skipped to respect the theme’s own light colors (recommended) 
* Accessibility options: 
 * Reduced motion support (respects prefers-reduced-motion) 
 * Optional focus ring improvements for keyboard navigation 
* Tools: 
 * Export settings to JSON 
 * Import settings from JSON 
 * Reset settings to defaults (with confirmation) 
* Admin UX improvements: 
 * Reduced flicker on initial load (palette + lock state handling) 
 * Improved state synchronization for preset/custom palettes 
 * Improved save-state detection in sidebar
Notes: 
* This plugin is intended for Astra themes. If Astra is not active, the plugin’s frontend output is disabled. The admin page remains available.
Plugin page: 
https://wordpress.org/plugins/easy-dark-theme-for-astra/

Easy Dark Theme for Astra

Easy light/dark mode for Astra with a toggle button and optional palette mapping to Astra Global Colors.

IJM Theme Switcher Bar vs Easy Dark Theme for Astra