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Guide
Update SKUs in bulk in Seller Center
Last updated on Sep 30, 2025
Reading time: 2 min
Overview

When you set up your items on Walmart Marketplace, each item’s product identifier is associated with a single SKU. If you need to update the SKUs for one or several items at once, follow the steps below.

Update SKUs

Step 1 — Get started

Navigate to your Catalog in Seller Center and select the Add items button. Select the Upload in bulk  link located under Add thousands of items using a spreadsheet. On the next page, navigate to the New items section and select the Build spreadsheet button. 

Notes:

You must select the Add items button to download and complete all the attribute requirements in the template to update your SKUs. 

Step 2 — Download and complete the template 

Select the product categories for the items you want to update the SKUs for, then choose Next. Then choose up to 10 product types. Once you’ve chosen your product types, choose Next. Finally, choose Seller fulfilled as your preferred fulfillment option. When you’re ready, select the Download button at the bottom right corner of the page.  

Notes:

If your item is fulfilled through Walmart Fulfillment Services (WFS), you can't change the SKU. It’s unique to the item and can't be replaced or reused. This helps prevent item mix-ups at fulfillment centers. 


In the template, fill in your updated SKU and all the other required fields and item attributes including the column labeled SKU Update. The SKU Update column is located in the Optional section of the template, but you must choose Yes from the dropdown menu for the SKUs to successfully update.

Step 3 — Upload the completed template

To upload your completed template, navigate to your Catalog in Seller Center and select Add items. Select the Upload in bulk link located under Add thousands of items using a spreadsheet. You can drag and drop your file onto the browser window under Upload, or select the browse link to locate the file on your computer. Updates can appear in as quickly as 15 minutes or can take up to four hours.

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