What is Custom Sidebars plugin?
Custom Sidebars is a WordPress plugin by WPMU DEV that enables creating multiple custom sidebar widget areas and assigning them to specific pages, post types, categories, or custom post types as replacements for the theme’s default sidebars. Instead of one sidebar configuration for all pages, Custom Sidebars allows each section of the site to have a completely different sidebar with different widgets — without theme code modifications.
The plugin adds a “Custom Sidebars” panel to the WordPress widget editor where you create named sidebar configurations and configure which theme sidebars they replace on which pages. For example: the default sidebar shows recent posts and categories globally, but the WooCommerce product pages display a product-specific sidebar with a cart widget and product filter, while the blog category pages show a blog-specific sidebar with author bio and related posts widgets.
Note: Custom Sidebars works only with the classic WordPress widget interface. For WordPress 5.8+ with the block-based widget editor, the Classic Widgets plugin must be installed alongside Custom Sidebars to restore compatibility. This limitation reflects the plugin’s design as a pre-Gutenberg solution for the widget system that is being transitioned away from in modern WordPress.
Need Help With Custom Sidebars Setup, Troubleshooting, or Customization?
Need help with Custom Sidebars? Whether you are dealing with errors, broken functionality, styling problems, plugin conflicts, or advanced customization, we can help you fix the issue and get the plugin working properly on your WordPress site.
Get Custom Sidebars Expert HelpKey Features
- Create unlimited custom sidebar configurations
- Assign custom sidebars to specific pages, posts, categories, post types, or archives
- Replace theme default sidebars with custom configurations per location
- WordPress Multisite support
- Classic widget interface integration
Pros & Cons
Pros
- Enables per-page widget customization without theme code changes
- Multiple sidebar configurations allow targeted content per site section
- More flexible than Widget Options for complete sidebar replacement vs. individual widget visibility
Cons
- Requires Classic Widgets plugin for WordPress 5.8+ — extra plugin dependency
- Not compatible with FSE block themes — limited long-term relevance
Free vs Premium
Free on WordPress.org. No paid version (WPMU DEV maintains it as a free community plugin).
Common Problems & Fixes
Custom Sidebars is not applying the custom sidebar on the configured pages — the default theme sidebar still shows. How do I verify the assignment?
In Appearance → Widgets, open the Custom Sidebars panel at the bottom. Check the created custom sidebar’s configuration — verify the “Replace” section lists the specific pages, categories, or post types where this sidebar should appear. Ensure the theme’s original sidebar name is selected as the sidebar being replaced. Save and clear all caches. Also verify the theme actually uses widget areas — themes that hardcode sidebar content without widget areas cannot be replaced by Custom Sidebars.
After installing WordPress 5.8+, Custom Sidebars is no longer working — the sidebar configurations are ignored. How do I restore functionality?
WordPress 5.8 introduced the block-based widget editor which is not compatible with Custom Sidebars’ classic widget architecture. Solution: install the Classic Widgets plugin (by WordPress.org). This restores the classic widget editor (Appearance → Widgets) which Custom Sidebars requires. With Classic Widgets active, Custom Sidebars functions as expected. Note that this is a workaround — long-term, consider migrating to block-based conditional widget visibility for the block editor era.
A custom sidebar is showing on pages it should not be on — it appears globally instead of on the configured specific pages. How do I fix the assignment scope?
In the Custom Sidebars configuration, the sidebar’s scope must be correctly set. Check: (1) the “Visibility” or “Location” settings for the custom sidebar — “Global” or “All pages” means it replaces the default sidebar everywhere; (2) change the scope to “Specific locations” and select only the intended pages or categories; (3) verify there is not a conflict between multiple custom sidebars targeting overlapping conditions — Custom Sidebars uses the most specific match for each page.
Customization & Developer Notes
How do I create a WooCommerce product page-specific sidebar using Custom Sidebars?
In Appearance → Widgets → Custom Sidebars section, create a new sidebar named “Product Sidebar.” Add appropriate widgets: WooCommerce product price, add to cart, product categories, related products, and cart. In the Custom Sidebars location configuration, set this sidebar to replace the theme’s default sidebar on “Single Product” post type. The product-specific sidebar with commerce-relevant widgets now replaces the default blog-oriented sidebar on all WooCommerce product pages.
How do I export my Custom Sidebars configurations to use on a new WordPress installation?
Custom Sidebars stores configurations in WordPress options. For export: (1) use a full WordPress database backup (e.g., UpdraftPlus) and import to the new site; (2) or use the WordPress Customizer Export/Import to transfer relevant settings; (3) note that Custom Sidebars itself may not have a built-in export — check current plugin version for export functionality. The most reliable transfer method is a full site migration using a migration plugin (All-in-One WP Migration, Duplicator) that copies the complete database.
Frequently Asked Questions
Is Custom Sidebars better than Widget Options for managing different sidebars per page?
Custom Sidebars and Widget Options address the same problem differently. Custom Sidebars creates completely separate sidebar configurations with entirely different widget sets per location — ideal when sections need very different widgets. Widget Options controls visibility of individual widgets within a single sidebar — better for fine-tuning a mostly shared sidebar with some per-page exceptions. Use Custom Sidebars when different site sections need completely different sidebar content. Use Widget Options when most pages share the same sidebar with small variations.
Does Custom Sidebars work with Elementor-built pages?
Custom Sidebars modifies theme-registered widget areas. Elementor-built pages typically do not display theme widget areas (sidebars) unless the Elementor layout specifically includes a WordPress Sidebar widget. If your Elementor pages include a sidebar widget area (Elementor → Widgets → WordPress Sidebar), Custom Sidebars’ custom configurations apply to that sidebar. Most Elementor full-width pages have no traditional sidebar, making Custom Sidebars not applicable to those pages.
Can Custom Sidebars break after updates?
Yes, that can happen, especially on older sites with many plugins. This usually happens when the plugin, theme, and add-ons are updated out of sequence. In most cases, testing on staging catches the issue before it reaches the live site. From experience, backups and changelog reviews save a lot of cleanup time.
What should I check before installing Custom Sidebars?
Start by checking whether another plugin already does the same job. In most cases, overlap is what creates avoidable conflicts and performance issues. A common issue is installing a plugin because it looks convenient without checking the stack first. From experience, a short compatibility review avoids most of the pain later.