What Checkout Extensions do
- Display personalization details in checkout (already native)
- Add fields (delivery instructions, gift message)
- Post-purchase upsell (matching product)
- Custom order summary rendering
Plus-only
Non-Plus stores use Shopify Scripts (deprecated) or standard checkout. Checkout Extensions modern replacement — Plus only.
Development
Shopify CLI + Function extension. React components. Deploy to app.
Common extensions
- Add delivery date picker to checkout
- Add gift wrap checkbox at checkout
- Show personalization thumbnail
- Post-purchase 'complete the set' upsell
Frequently asked questions
What are Shopify Checkout Extensions?
Plus-only feature to customize Shopify's native checkout with React components.
Non-Plus alternatives?
Standard checkout customization limited. No Scripts (deprecated). No Checkout Extensions.
Best use cases for Checkout Extensions?
Delivery date picker, gift wrap at checkout, personalization thumbnail, post-purchase upsell.
How to build Checkout Extension?
Shopify CLI + React components. Deploy to app. Merchant installs.
Extensions vs Scripts?
Scripts deprecated. Extensions modern replacement. Plus-only.
Post-purchase upsell?
Yes via Checkout Extensions. Runs after payment, before thank-you page.
Cost of Checkout Extensions?
Development cost. Shopify Plus subscription ($2,000+/mo) required.
Best framework?
Shopify UI Extensions React. Native to Shopify's checkout runtime.
Related reading
Try it free on Shopify
Print It My Way's permanent Free plan includes live preview, custom options, and Cart Transform pricing.
Install Print It My Way