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.

bartosznowak

kamiljanq

rainkom

tomziel

Osom Studio WordPress and WooCommerce Agency

Osom Multi Theme Switcher lets you run multiple WordPress themes on a single site — assigning different themes to specific pages, posts, post types, categories, tags, or custom URLs.
Built by <a href="https://www.osomstudio.com" rel="nofollow ugc">Osom Studio</a>, a WordPress & WooCommerce agency with 10+ years of experience managing complex multi-theme setups for clients.
We built this plugin because we kept solving the same problem for clients: one WordPress installation, multiple designs. Landing pages that need a completely different look. A WooCommerce store that runs a separate theme from the corporate site. A membership area with its own design system.
Instead of hacking theme conditionals into functions.php every time, we packaged our solution into a plugin.
<h4>When you need this</h4>
<ul>
<li>Landing pages with a unique design — without touching your main theme</li>
<li>WooCommerce stores running a dedicated shop theme alongside a corporate theme</li>
<li>Membership or gated sections with a separate visual identity</li>
<li>Theme testing — preview a new theme on specific pages before switching site-wide</li>
<li>Agencies managing multi-brand WordPress installations from a single dashboard</li>
</ul>
<h4>Key features</h4>
<ul>
<li>Flexible rules — assign themes by page, post, post type, custom URL, category, or tag</li>
<li>Full theme loading — the alternative theme’s functions.php loads completely, so page builders (Elementor, Divi, Beaver Builder) and custom functionality work as expected</li>
<li>Admin theme switcher — access settings for any installed theme directly from the admin bar</li>
<li>Per-user admin theme — each administrator can use their preferred dashboard theme independently</li>
<li>Draft & scheduled support — apply themes to unpublished content for preview and staging</li>
<li>REST API support — configure custom REST API prefixes per theme</li>
<li>ACF compatible — loads Advanced Custom Fields JSON from all active theme directories</li>
<li>No code required — set up everything through the WordPress admin panel</li>
</ul>
<h4>How it works</h4>
<ol>
<li>Install and activate the plugin</li>
<li>Go to Appearance > Theme Switcher</li>
<li>Select a rule type (Page, Post, Post Type, Category, Tag, or Custom URL)</li>
<li>Choose the content to target</li>
<li>Pick the alternative theme</li>
<li>Click Add Rule — changes apply immediately</li>
</ol>
The plugin hooks into WordPress on the <code>setup_theme</code> action, before any theme code runs. This ensures full compatibility with theme features, widgets, customizer settings, and page builders.

Osom Multi Theme Switcher

Use different themes for specific pages, posts, or URLs while keeping your main theme active site-wide.

IJM Theme Switcher Bar vs Osom Multi Theme Switcher