If you want to buy a Walmart gift card, you can get a physical or e-gift card from Walmart or Sam’s Club, in-store or online. If you don’t need a specific amount, you can also purchase a Walmart gift card through a number of resellers, often at a discount. Yes you can use it to purchase things on Walmart.com, and no is not the same as the credit card, becuase the other you have to pay back, but the procedure is the same at check out time. Follow these intructions: Using a Walmart Gift Card online at Walmart.com is simple: 1.Find a product you would like to purchase and place it in your cart. Saving Walmart Gift Card Information Does Not Limit Card to Use Online. Saving a Walmart plastic Gift Card to your Walmart.com online account does not limit you to using the Walmart Gift Card online. You can use Walmart and Sam’s plastic Gift Cards and eGift cards at any retail or only format of Wal-Mart Stores, Inc. in the U.S. or Puerto Rico, including Sam’s Clubs. Walmart Gift Card Balance is an Estimate.