Amazon FNSKU Label Barcode Generator
Amazon FBA sellers
Amazon FNSKU Label
What is Amazon FNSKU Label?Use-Case Presets › Amazon FNSKU Label
What is a Amazon FNSKU Label barcode?
An FNSKU (Fulfillment Network Stock Keeping Unit) is the code Amazon uses to identify your units in its fulfillment centers. FBA sellers put an FNSKU label on each unit so Amazon can link it to their seller account. This preset makes the barcode in the format Amazon expects.
The FNSKU is 10 uppercase letters and digits, and Amazon labels show it as a Code 128 barcode. You find it in Seller Central for each product; it usually starts with X0, or B0 when Amazon uses your ASIN. Code 128 has its own check character, so there is no check digit for you to add.
What data can Amazon FNSKU Label hold?
Exactly 10 uppercase letters and digits, for example X00ABCD1EF. We offer to convert lowercase to uppercase, and warn you if the code doesn’t start with X0 or B0.
Recommended size
Amazon accepts FNSKU labels from 1 x 2 inches up to 2 x 3 inches (about 25 x 51 mm to 51 x 76 mm). Use white, removable labels and cover any other barcodes on the product.
More Use-Case Presets barcodes
How to Create a Barcode in 3 Steps
Choose a barcode type
Select a category on the left (e.g. Linear Codes), then the exact type like Code-128.
Enter data & customise
Type your data — we check it live and add check digits. Adjust size, font and colors.
Download or print
Get PNG, JPG, SVG, PDF or EPS, or print a full sheet of labels in one click.
Why Use QRCodeChamp Barcode Generator
125+ barcode types
Every linear, 2D, GS1, postal, healthcare and payment code.
Live validation
Friendly errors with one-click fixes and automatic check digits.
Print-ready PDF
Exact mm sizes, label sheets (Avery, A4, 4×6 thermal).
Bulk barcodes
Paste a list or generate number sequences.
Choose the Type of Barcode You Need
Not sure which barcode to use? Start with what you need it for — we’ll pick the right type.
Frequently Asked Questions
No. The ASIN identifies the product on Amazon, the UPC identifies it in retail, and the FNSKU identifies your units in Amazon’s warehouses.
No. Amazon assigns the FNSKU, so the label itself needs no GS1 prefix. Amazon may still ask for a GTIN when you list the product.
Yes. Enter one FNSKU per line and download a label-sheet PDF for your printer.
FNSKUs only use uppercase letters. We offer to convert your text to uppercase for you.