ExtensionKit ‑ Custom Checkout

Supercharge your checkout with upsells, custom fields, discounts, cart validations & more

Unlock the full potential of your Shopify checkout with Extension Kit. Generate revenue with product upsells and subscription upgrades, and collect additional information from customer's with custom fields. Easily customize checkout pages using drag-and-drop blocks for banners, images, and informational text. Customizable for all of your customer's with Shopify Markets. Advanced discounts powered by Shopify Functions. Checkout customizations built for Shopify Plus plans only.

• Checkout product upsells, subscription upgrades, banners, custom fields & more
• Create tiered product or order discount promotions
• Schedule blocks and discounts for timed promotions
• Limit quantity of items in the cart
• Compatible w/ Shopify B2B & Shopify Markets for translations and multi-currency