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Amazon FNSKU barcode

An FNSKU isn’t a number you choose. Amazon assigns it, and Seller Central is where you get the label.

What is an FNSKU?

Amazon’s own identifier for a unit of inventory inside its fulfillment network, distinct from your product’s UPC or EAN. It exists so Amazon can track which specific listing an item belongs to once it’s inside an FBA warehouse, separate from the retail barcode already on the packaging.

Where do you get an FNSKU label?

From Seller Central, per listing, when you create an FBA shipment. Amazon generates a printable label with the correct FNSKU, and that’s what should go on the unit, not a barcode built from a number you picked yourself.

When would you use this site’s generator instead?

Only to re-encode an FNSKU value Amazon has already given you. For example, printing a replacement label after Seller Central’s own PDF got damaged or lost, with the exact code copied from your account.

SVG stays sharp at any size and is what you want for printing. PNG is easier to drop into a spreadsheet or listing.

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For your product’s own retail barcode rather than the FBA unit label, see Amazon product barcodes.

A barcode generated on this page is not a registered GTIN. It encodes whatever number you enter into a valid, scannable symbol. It does not register that number to you. Selling through a retailer or listing on a marketplace under most categories requires a number issued to your business by GS1. See do you need a GS1 number before you print at scale.

Written by Robert Wells · Published 2026-08-03