How to set up AJAX filtering on your Shopify store

June 19, 2026

June 10, 2026

•

5 minutes

Filters are meant to help shoppers move faster through your catalog. But when every filter click reloads the whole collection page, the experience can start to work against them.

That friction is easy to miss because the filters still technically work. The problem is what happens between each selection: a pause, a page flash, a reset panel.

For stores with large catalogs or mobile-heavy traffic, those small interruptions can make product discovery feel harder than it should. That’s why AJAX filtering is an important part of good Shopify filter UX.

Summary

Reloading the full collection page after every filter click can make Shopify product discovery feel slower than it should.
AJAX filtering keeps shoppers moving by updating the product grid while the rest of the page stays stable.
A smoother filter experience helps shoppers refine products with fewer pauses, resets, or lost selections.
With Boost Commerce, AJAX filtering is built into the theme setup, making reload-free filtering easier to deliver on Shopify.

See AJAX filtering in
action.

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What is AJAX filtering?

AJAX filtering changes how a Shopify collection page responds after a shopper selects a filter. Instead of loading a new version of the whole page, the storefront updates the product results in place.

In a reload-based experience, each filter click can trigger a new page request. The collection refreshes before the updated products appear, which can interrupt the grid, the filter panel, and the shopper’s selected options.

With AJAX, the filter selection is processed in the background. The product grid changes, while the surrounding page stays stable. This supports faster refinement, clearer selected filter states, and filter options that can update as shoppers narrow the catalog.

That live updating becomes especially useful when the filter system also refreshes product counts or removes unavailable options, helping shoppers avoid combinations that lead to zero filter results⁠.

KEY DEFINITION:

AJAX filtering is a collection-page update method that refreshes Shopify product results without reloading the full page. It helps merchants create a faster, more continuous filtering experience, so shoppers can narrow products with fewer interruptions.

Why do full-page filter reloads hurt product discovery?

Filtering is a repeated action. A shopper might filter by size, then color, then price, then availability. If each selection reloads the page, product discovery becomes a stop-start process.

Lost speed

The shopper has to wait for the page to respond before they can make the next choice. Even a short delay makes refinement feel heavier.

Lost context

If the grid jumps, the filter panel closes, or selected options move, the shopper has to work out what changed before continuing.

Lost filter depth

When filtering feels slow, shoppers may stop narrowing too early. That can leave them scanning irrelevant products or leaving the collection before they find the right item.

These pauses are not just a technical issue - page reloads can increase bounce rates. And when shoppers leave mid-discovery, you lose high-intent traffic before it has a chance to convert.

The problem becomes more visible on smaller screens.

Mobile shoppers already have less space to view products, open filters, and compare options, so a panel that closes or resets after each selection creates unnecessary extra work. AJAX supports a steadier mobile filter panel experience⁠ by keeping the page stable while results update.

How do you implement AJAX filtering with Boost?

In Boost, AJAX filtering is handled through the theme setup. Once Boost’s filter and product grid components are correctly placed on a Shopify OS 2.0 theme, collection results can update in place when shoppers apply filters.

You do not usually need to switch on a separate AJAX setting. The key is making sure Boost is connected to the right theme and active on the collection pages where filters appear.

1

Step 1

Confirm your store uses a Shopify OS 2.0 theme.

2

Step 2

Install Boost.

3

Step 3

Run the Boost theme setup flow.

4

Step 4

Check that Boost components are active on the collection page.

5

Step 5

Test filtering on desktop and mobile.

Automatic setup will be enough for many stores. If your theme is heavily customized, manual placement may be needed so Boost’s filter and grid components sit correctly in the collection template.

How do you check AJAX filtering is working?

Once setup is complete, test the collection page as a shopper would. The aim is not just to confirm that the filter applies, but to check how the page behaves while the result changes.

Apply a filter on a live or preview collection page. and use this checklist:

Applying a filter updates only the product grid.

The header and navigation stay in place.

The filter panel does not disappear or reset.

Selected filters remain visible after results update.

The page does not flash, go blank, or show a full-page reload.

The URL updates to reflect the filtered state.

Opening a product and going back returns the shopper to the filtered results.

The behavior works on both desktop and mobile.

If these checks pass, AJAX filtering is working correctly. The shopper can change the filters, view updated products, and continue browsing without the collection page restarting.

Why are your Shopify filters still reloading? AJAX filter troubleshooting

If your filters still reload after installing Boost, start with what you can see on the storefront.

Check whether the reload happens everywhere, only on certain collections, or only on one version of the theme.

What you see	Likely cause	What to check
Whole page reloads every time	Setup incomplete	Re-run theme setup
One collection reloads	Collection setup issue	Check filter assignment
Preview works, live does not	Wrong theme tested	Check active theme
URL changes, grid does not	Theme code conflict	Review collection scripts
Filter panel closes or resets	Block placement issue	Check Boost blocks
Desktop works, mobile does not	Mobile theme conflict	Test mobile drawer
Reloads started after changes	Old code conflict	Remove legacy snippets

A better filter experience keeps shoppers moving

A strong filter experience does more than update products quickly. It helps shoppers stay in control of the collection page, especially when they’re narrowing a large catalog or comparing similar products.

When filters reload the page, that control weakens. The shopper has to wait, check what changed, and rebuild momentum. When results update smoothly, they can keep refining without the page interrupting the decision.

Boost helps Shopify stores deliver that kind of filtering experience through a setup built for fast collection-page updates, stable filter behavior, and smoother product discovery.

Build a faster filter
experience.

Book your Boost demo

FAQs

Does Shopify have AJAX filtering by default?

Shopify’s native filtering behavior depends on your theme and setup. If you want filters to update without a full page reload, you usually need a theme or filtering app that supports AJAX behavior.

Can Shopify filters update without reloading the page?

Yes, Shopify filters can update without a full page reload when the collection page uses AJAX filtering. This lets the product grid refresh in place while the rest of the page stays stable.

Does AJAX filtering make Shopify collection pages faster?

AJAX filtering can make collection pages feel faster because shoppers do not have to wait for the full page to reload after every filter click. It does not replace wider performance work, but it reduces one common source of friction during product discovery.

Can AJAX filtering work on customized Shopify themes?

AJAX filtering can work on customixed Shopify themes, but the setup may need more care. If the collection template has custom code, the filter and product grid components may need manual placement or testing to make sure filter clicks do not behave like standard page links.

Ellie Bradford

•

In-Product Marketing Lead

June 10, 2026

•

5 minutes

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How to set up AJAX filtering on your Shopify store

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