Home · Platforms · Walmart · UPC-A

Walmart UPC Code Requirements: GS1 Compliance for Marketplace and Retail Link Suppliers

Walmart Marketplace requires a registered GTIN — UPC-A is the standard — for every listed item. Walmart is stricter than Amazon: every code must be registered to your brand at GS1.org, with no Brand-Registry exemption equivalent. Reseller UPCs reliably fail Walmart's validation.

Generate

For physical-store supply (Walmart Retail Link), the requirements stack: each unit needs a UPC-A; each outer case needs an ITF-14 generated from the unit GTIN.

Step by step

1. 1

   Buy your UPCs from GS1.org

   Walmart explicitly requires GS1-registered codes. Other sources fail.

2. 2

   Sign in to Walmart Seller Center

   Items > Add Items > Single Item or Bulk Upload.

3. 3

   Enter the UPC in the Product ID field

   Walmart validates against GS1 in real time. Mismatches reject the item before publishing.

4. 4

   For Retail Link (in-store supply), add ITF-14 for cases

   Each master case gets its own ITF-14 generated at /generators/itf-14, based on the unit UPC-A.

Gotchas

• Walmart has NO equivalent of Amazon's Brand Registry exemption. You cannot list without a real GS1 UPC.
• Bulk uploads with invalid UPCs fail the entire batch — validate every code locally before submitting.
• ITF-14 on cases must include the bearer bars (top/bottom black bars). Walmart receiving rejects ITF-14 without them.

FAQ

Related

• UPC-A generator — standalone generator without Walmart steps.
• All Walmart barcode guides
• All platforms