Amazon requires each unit sent to fulfilment centres to carry a scannable FNSKU label unless it is stickerless commingled inventory. Labels must be removable, between 1 × 2 inches and 2 × 3 inches. Paste your FNSKUs, titles and quantities from Seller Central, choose 30-up Letter, A4 24-up or a thermal roll, and print. Amazon also offers label printing in Seller Central; BarcodeKit is handy for reprints and bundles.
Verified before you print
BarcodeKit draws every barcode from one precise geometry model, then reads it back with ZXing, an open-source scanner engine running in your browser. PNG, SVG, true-size PDF and EPS downloads all come from that same verified geometry, so what we check is exactly what you print.
Private by design
Nothing you type or upload leaves your device. There is no account, no server-side processing and no tracking of your product numbers.
Need a QR code for a website or menu instead? Use our sister app, QR Code Forever, for free static QR codes that never expire.
Frequently asked questions
Does an FNSKU replace my UPC?
For FBA, yes: the FNSKU label covers the manufacturer barcode so Amazon can track your units. You still need a GS1 UPC or EAN (or a GTIN exemption) to create the listing.
Which barcode type is an FNSKU?
Code 128. FNSKUs usually start with X00. Choose Code 128 and keep the X-dimension at 0.25 mm or more for reliable scanning.
Is BarcodeKit free?
Yes. Generate, verify and download barcodes as PNG, SVG, PDF or EPS with no account, no watermark and no sign-up.
Are my barcode numbers uploaded anywhere?
No. Barcodes are drawn and checked entirely in your browser. Your product numbers, SKUs and CSV files never leave your device.
Do you sell UPC or EAN numbers?
No, and we recommend you never buy them from resellers. Official UPC, EAN and GTIN numbers are licensed by GS1, the standards body. Amazon and most retailers check numbers against the GS1 database and can reject recycled ones.