What is an FNSKU barcode for Amazon FBA?

FNSKU stands for Fulfillment Network SKU. It is a unique barcode Amazon assigns to each product listing in your seller account. Every unit you send to Amazon FBA must have an FNSKU label so Amazon can identify and track your inventory separately from other sellers. You can find your FNSKUs in Seller Central under Manage Inventory — Print Item Labels.

What barcode format does Amazon FNSKU use?

FNSKU barcodes use Code 128 encoding. The FNSKU itself looks like X001ABCDEF — a combination of letters and numbers. Bulk Barcode Generator encodes your FNSKU values in Code 128 and automatically calculates the check character, so the labels scan correctly at Amazon warehouses.

What size should Amazon FBA barcode labels be?

Amazon recommends labels that are at least 1 inch tall and 2 inches wide. The most common size is 1"×2-5/8" (Avery 5160), which fits 30 labels per sheet and is widely available. You can also use 1"×2" labels for a tighter fit. Bulk Barcode Generator exports a ready-to-print Avery 5160 PDF.

Can I use the manufacturer UPC barcode instead of an FNSKU?

Yes, if your account qualifies for a barcode exemption (typically Brand Registered sellers). Without an exemption, Amazon requires an FNSKU label on every unit. Most new sellers and private label sellers should use FNSKU labels to avoid inventory commingling with other sellers.

How do I get my FNSKU numbers from Amazon?

Go to Seller Central → Inventory → Manage All Inventory. Select the products you want to label, click Action → Print Item Labels. Amazon will show you the FNSKU for each ASIN. Copy these FNSKU values and paste them into Bulk Barcode Generator to create printable labels.

📦 Amazon FBA — FNSKU & UPC Labels

Free Amazon FBA Barcode Generator

Amazon FBA requires every inbound unit to carry a scannable barcode. Export your FNSKU list from Seller Central, paste it into this tool, and generate print-ready barcode labels in bulk — Code 128 format, precisely sized for Avery 5160 sticker sheets. No signup required, no row limit, no watermark.

Generate FBA Barcodes Free →

No signup No row limit Avery 5160 PDF Data stays in your browser

Why Use Our Amazon FBA Barcode Generator?

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Paste Your FNSKU List

Export your FNSKU list from Seller Central, paste it directly into the tool, and generate all your labels in one batch — no reformatting or spreadsheet cleanup needed.

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Avery 5160 Compatible

Generates a 30-up PDF sized exactly for Avery 5160 label sheets (1"×2-5/8") — Amazon's recommended FNSKU label size. Load the sheet, print, and peel.

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Code 128 Format

FNSKU values use Code 128 encoding. The generator automatically calculates the check digit, so every label scans reliably at Amazon fulfillment centers.

Generate FBA Labels in 3 Steps

Get Your FNSKU List from Seller Central

Go to Inventory → Manage All Inventory → select your products → Action → Print Item Labels. Amazon displays the FNSKU for each ASIN. Copy the list.

Paste FNSKUs into the Generator

Open Bulk Barcode Generator, paste your FNSKUs one per line (or upload a CSV), select Code 128, and preview your labels instantly in the browser.

Download Avery 5160 PDF and Print

Export the Avery 5160 PDF — 30 labels per sheet. Load your label paper into any laser or inkjet printer and print. Apply labels before sending inventory to Amazon.

FNSKU vs Manufacturer Barcode — Which to Use?

	FNSKU Label	Manufacturer Barcode (UPC/EAN)
Required by	Amazon (default)	Amazon (with exemption)
Who assigns it	Amazon (via Seller Central)	GS1 (paid registration)
Format	Code 128 (alphanumeric)	EAN-13 / UPC-A
Inventory mixing	No — your stock kept separate	Yes — mixed with other sellers
Best for	Most FBA sellers	Brand registered sellers with exemption
Cost	Free	GS1 fee ($250+/yr)

Common FBA Seller Use Cases

Private Label

Private Label Products

OEM products going directly to Amazon warehouses need FNSKU labels before shipment. Generate and print them in bulk before packing your units.

Retail Arbitrage

Items resold through FBA often need a fresh FNSKU label covering the original manufacturer barcode. Print a replacement label for each unit.

Bundles

Bundled Products

A bundle is treated as a new ASIN and requires its own unique FNSKU label. Generate bundle labels separately from the individual-item labels.

Prep Service

Prep Service Replacement

If you handle your own FBA prep instead of paying Amazon to label units, print FNSKU labels at home or at your warehouse before shipping to an FC.

What Goes on an FBA Barcode Label?

Amazon has specific requirements for FNSKU label content. A compliant label must include the following fields — and the label must be at least 1"×2" (Avery 5160 at 1"×2-5/8" is recommended):

FNSKU barcode Required The Code 128 barcode encoding your FNSKU (e.g. X001ABCDEF). This is what Amazon scanners read at the fulfillment center receiving dock.
FNSKU number Required The human-readable FNSKU value printed below the barcode (e.g. X001ABCDEF). Allows manual lookup if the barcode fails to scan.
Product title Optional but strongly recommended. A short product name helps you and Amazon staff visually identify the correct item on the shelf.
Condition New or Used. Amazon requires condition to be stated on the label for used or refurbished items; it is optional for new goods but commonly included.

Frequently Asked Questions

What is an FNSKU barcode for Amazon FBA?: FNSKU stands for Fulfillment Network SKU. It is a unique barcode Amazon assigns to each product listing in your seller account. Every unit you send to Amazon FBA must have an FNSKU label so Amazon can identify and track your inventory separately from other sellers. You can find your FNSKUs in Seller Central under Manage Inventory — Print Item Labels.
What barcode format does Amazon FNSKU use?: FNSKU barcodes use Code 128 encoding. The FNSKU itself looks like X001ABCDEF — a combination of letters and numbers. Bulk Barcode Generator encodes your FNSKU values in Code 128 and automatically calculates the check character, so the labels scan correctly at Amazon warehouses.
What size should Amazon FBA barcode labels be?: Amazon recommends labels that are at least 1 inch tall and 2 inches wide. The most common size is 1"×2-5/8" (Avery 5160), which fits 30 labels per sheet and is widely available. You can also use 1"×2" labels for a tighter fit. Bulk Barcode Generator exports a ready-to-print Avery 5160 PDF.
Can I use the manufacturer UPC barcode instead of an FNSKU?: Yes, if your account qualifies for a barcode exemption (typically Brand Registered sellers). Without an exemption, Amazon requires an FNSKU label on every unit. Most new sellers and private label sellers should use FNSKU labels to avoid inventory commingling with other sellers.
How do I get my FNSKU numbers from Amazon?: Go to Seller Central → Inventory → Manage All Inventory. Select the products you want to label, click Action → Print Item Labels. Amazon will show you the FNSKU for each ASIN. Copy these FNSKU values and paste them into Bulk Barcode Generator to create printable labels.