Amazon UPC Codes: How to Generate & Add a UPC-A to Your Product Listing

Amazon requires a Product ID (most commonly a UPC-A) on every new SKU in nearly all of its US and Canada categories. The UPC must syntactically validate AND match a record in the GS1 global database that resolves to your brand — Amazon spot-checks this and rejects mismatches.

If you own your brand and want bulletproof listings: buy your UPCs from GS1 (gs1.org) registered to your company. If you're testing the listing flow, sourcing one-off SKUs from Etsy/eBay, or only listing under your existing Brand-Registry exemption, a valid-looking UPC-A you generate here will work for the syntactic check.

Step by step

1
Generate or look up your UPC-A
Use our generator above for a syntactically valid 12-digit UPC-A with proper check digit. For Amazon's GS1 validation, purchase a real UPC from GS1.org registered to your brand.
2
Sign in to Amazon Seller Central
Go to Catalog > Add a Product > I'm adding a product not sold on Amazon.
3
Enter the UPC in the Product ID field
Select 'UPC' from the Product ID Type dropdown and paste the 12-digit code. Amazon will check both the check digit and the GS1 registry — purchased UPCs trace back to your brand and pass.
4
If Amazon rejects with 'invalid GTIN'
Apply for a GTIN Exemption (Brand Registry required) OR purchase a UPC from GS1.org and resubmit. UPCs from third-party resellers (eBay, SnapUPC, etc.) often fail the GS1 check.
5
Add FNSKU label for FBA
If shipping to Amazon FBA, each unit also needs an FNSKU label (separate from the UPC). Generate FNSKU labels at /generators/fnsku or via Seller Central.

Gotchas

Amazon's GS1 validator checks the brand name on file. A UPC bought from a reseller may be syntactically valid but won't match your seller name and gets rejected.
Generic Brand-Registry exemptions are category-specific — you may be exempt for Toys but not for Grocery.
Each variant (color, size) needs its own UPC. A parent listing with 5 child variants needs 5 unique UPCs.
Once accepted, the UPC binds permanently to the ASIN — don't reuse it for a different product later.

FAQ

Do I need to buy UPCs from GS1 to sell on Amazon?

For Amazon to accept the UPC long-term and pass spot-checks, yes — buy them from GS1.org registered to your brand. Reseller UPCs work intermittently and risk de-listing.

Will Amazon accept a UPC generated for free here?

The codes here are syntactically valid and useful for testing, internal SKUs, and Brand-Registry-exempt listings. For production Amazon listings without exemption, register your UPCs at GS1.org so they pass Amazon's brand match.

What's the difference between a UPC and an FNSKU?

UPC identifies the product universally across all retailers. FNSKU identifies your unit inside Amazon's fulfillment network. FBA shipments need both — UPC on the listing, FNSKU on each physical unit.

Can I list on Amazon without a UPC?

Only with a GTIN Exemption (Brand Registry approved sellers) or in categories that don't require one (a small list — used books, custom artwork). For 95% of new SKU launches, a UPC or EAN is required.

Need real UPC codes for Amazon?

Amazon verifies UPCs against the GS1 database. Use authentic codes — starting at $5, instant download.

Buy from UPCs.com →

UPC-A generator — standalone generator without Amazon steps.
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