
Shopify Checkout Components Explained: What Merchants Need to Know in 2026
Checkout Components — Shopify's Checkout UI Extensions — are the modern, supported way to customize checkout: sandboxed React-style components that add banners, custom fields, and upsells without touching checkout.liquid. Here's what they are, what you can build, why the new model is safer, and what's available on your plan in 2026.




