Janssen Fast Filters for WooCommerce

Janssen Fast Filters adds a fast, lightweight product filter to your WooCommerce shop. Shoppers filter by category, attribute, and price and see results instantly, without page reloads.

It’s a block-based alternative to the default WooCommerce layered navigation, built for speed: optimized queries, a server-rendered first page, no frameworks, and no extra dependencies.

Filtering

• AJAX filtering with no page reloads
• Category filter with a collapsible hierarchy, loaded in a single query
• Product attribute filters for color, size, or any custom attribute
• Price range slider with min and max inputs
• AND logic (match all) or OR logic (match any) for options within a filter, set per block; different filters always combine
• Auto-apply, or an Apply button if you prefer
• Sort by default order, popularity, rating, latest, or price
• Pagination
• Active filter tags with one-click removal
• Categories and attribute options with no products are hidden automatically

Layouts

• Sidebar: classic filter column next to the products that stays in view on desktop
• Top bar: compact dropdowns above the products
• Modal: filters open in a panel from a button
• Mobile slide-in panel with touch-friendly controls on every layout
• Choose which categories and attributes each block shows, and the order of the attributes
• Add several filter blocks to one page; each keeps its own filters and URL key

Shareable URLs and SEO

• Filters, sorting, and page are kept in the URL, so Back, reload, and shared links show the same products
• The first page of products is rendered on the server, so it appears without waiting for a request
• Works without JavaScript: filters, sorting, and pagination fall back to a regular form and links
• Safe behind page caches and CDNs: visitor pages contain no expiring security token
• Filtered and sorted URLs are served as noindex, follow, so search engines don’t index endless filter combinations

Accessible

• Keyboard navigation and ARIA labels
• Focus moves into the filter panel and back out, and Escape closes it
• Page scrolling is locked and restored correctly

For developers

• Versioned PHP and JavaScript extension hooks and lifecycle events
• Renderer hooks for custom product cards (custom renderers register through Pro)
• Catalog change events and a purge action for hosting caches
• Opt-in performance metrics with wp janssenff metrics and Server-Timing headers
• Fully translatable

Janssen Fast Filters Pro

Everything above is free and stays free. Janssen Fast Filters Pro is an optional add-on for stores that want more:

• Products that match your theme. Filtered results use your theme’s own WooCommerce product template, so badges, buttons, and theme hooks look exactly like the rest of your shop.
• Live product counts. Turn them on per block and every option shows how many products match the applied filters. Counts also work on catalogs with more than 10,000 products.
• Filter presets. Save filter combinations, such as “Summer sale – size M”, as one-click buttons for your shoppers.
• Sticky top bar and sticky controls. Keep the top bar in view while shoppers scroll, turn the sticky sidebar on or off, and set an offset for fixed headers.
• Style customizer. Set brand colors, corner radius, button style (rounded, square, or text-only), and option style (checkboxes or pill buttons) for attribute filters.
• Query caching. Product results and counts are cached and refreshed only when a change affects them. Orders and stock updates that don’t change availability keep the cache warm.
• Performance dashboard. After you turn on metrics, see request counts, cache hit ratios, and response times.
• Skeleton loaders. Placeholder product cards in your grid’s layout while results load.
• Top bar extras. The dropdowns show how many options are selected and the chosen price range.

Free vs Pro

• AJAX filtering by category, attribute, and price: Free and Pro
• AND/OR logic, auto-apply, sorting, and pagination: Free and Pro
• Sidebar, top bar, and modal layouts: Free and Pro
• Multiple filter blocks per page: Free and Pro
• Shareable URLs, server-rendered first page, works without JavaScript: Free and Pro
• Page-cache and CDN safe, SEO-friendly filtered URLs: Free and Pro
• Products rendered with your theme’s product cards: Pro
• Live product counts: Pro
• Filter presets: Pro
• Sticky sidebar on desktop: Free and Pro
• Sticky top bar, sticky on/off switch, and adjustable offset: Pro
• Style customizer: Pro
• Query and count caching: Pro
• Performance dashboard: Pro