com: Here’s the direct answer: To use a Walmart gift card online , simply add the items you wish to purchase to your cart, proceed to checkout, and during thepayment method selectionstep, choose “Gift Card”. If your gift card balance doesn’t cover the entire purchase, you can use another payment method to cover the remaining amount. Diving Deeper: The Step-by-Step Guide While the core process is simple, let’s break down each step to ensure a smooth and successful transaction. This is especially useful if you’re a first-time online shopper or simply want to ensure you don’t miss anything. Make sure everything you’re adding is eligible for online purchase, as some items might be exclusively available in-store.