The category filter block allows you to filter posts displayed with the standard Query Loop block by category, without a page refresh. The Interactivity API is fully supported.
Features
✅ The category filter can be displayed as links or as a select dropdown field
✅ You can display a post count number near each category
✅ Custom All Categories text
✅ Works without page refresh (AJAX + Interactivity API)
✅ Sticky positioning
✅ Block styles customization (Font size, Padding, Margin)
✅ The block can add parameters to the page URL, for example, ?filter-category=travel
The plugin also has a PRO version, its main difference is that it supports filtering by any custom taxonomy – Tags, Product Categories, Product Tags, Brands, etc. It has a bunch of other features too.
Pro features
⚡️ Custom taxonomies are supported
⚡️ Multiple taxonomy filters within the same Query Loop block (for example, by categories AND tags)
⚡️ Sort categories (terms) in the filter alphabetically, by post count, or in a custom order
⚡️ The filter can be displayed as buttons with the possibility of style customization (Text color, Background color, Border, Border radius, etc.)
⚡️ Display checkboxes in the dropdown filter to select multiple categories
Screenshots
Category Filter block in the Inserter
Category Filter block settings