The upsell widget allows you to display additional products directly in the checkout to increase the average order value. This block is created from the “Upsell” extension and must be manually installed from the Shopify theme editor.
💡 Check out our step-by-step guide here: How to Create an Upsell in Checkout
How to Install the Upsell Extension in Checkout
Go to your theme editor via Shopify > Online Store.
Change the page and select “Checkout and Customer Accounts”.
In the editor, choose the checkout area where you want the upsell to appear (for example, after the cart total).
Click “Add block” and search for “Planet – Upsell”.
Add the block and save your changes.
Done! The widget will now appear in the checkout for all customers who meet the conditions defined in the extension.
Adding More Than One Widget
If you have created more than one upsell extension, you must specify the widget ID you want to display in that particular block. Otherwise, Shopify won’t know which one to reference and it may not display correctly.
To do this:
Copy the unique ID of the upsell you want to show (found in the extension settings in Planet).
When adding the block in the checkout, enter that ID in the corresponding field.
This ensures you have precise control over which upsell appears in each checkout area.
💡 Still have questions?
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