Free SKU Generator

Build unique SKUs for inventory and listings.

⚙️ SKU Builder

Preview
CAT-BRD-001
Prefix
Category
Brand / Vendor
Size / Variant
Color
Sequential Number

Start #

Digits (padding)

Number of SKUs to generate (1-500)

 

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What is a SKU?

SKU Examples by Industry

CLTH-NIKE-LG-BLK-001 ELEC-APPL-IPHONE15-128GB FOOD-ORG-ALMONDS-1LB FURN-IKEA-DESK-OAK-42IN 2024-TOY-LEGO-60198 SKU-000001

Stock Keeping Unit

A SKU is a unique alphanumeric code assigned to products for inventory tracking. Unlike UPC barcodes which are universal, SKUs are internal codes you create for your own business needs.

Why Use SKUs?

SKUs help track inventory levels, identify products quickly, manage warehouse locations, analyze sales by variant (size, color), and integrate with inventory management systems.

SKU Best Practices

Keep SKUs short (8-12 characters), use meaningful codes, avoid special characters except hyphens/underscores, start with letters not numbers, and be consistent across products.

SKU vs UPC vs ASIN

SKU is your internal code. UPC/EAN is a universal barcode for retail. ASIN is Amazon's product identifier. You can use all three for the same product - each serves a different purpose.

Frequently Asked Questions

How should I structure my SKU?

A good SKU structure includes: Category + Brand + Product + Variant + Sequential Number. For example: CLTH-NIKE-TSHIRT-LG-BLK-001. Start broad (category) and get more specific. Keep it readable and consistent.

How long should a SKU be?

Ideally 8-12 characters. Shorter SKUs are easier to read and less prone to errors. Amazon recommends under 40 characters. Most inventory systems work best with alphanumeric codes under 20 characters.

Should I use the same SKU on Amazon and my website?

Yes! Using consistent SKUs across all sales channels (Amazon, Shopify, eBay, your website) makes inventory management much easier. Your SKU is your internal identifier that ties everything together.

What characters should I avoid in SKUs?

Avoid spaces, special characters (&, %, $, @), and characters that look similar (0/O, 1/I/l). Stick to uppercase letters, numbers, hyphens, and underscores. Don't start with numbers as some systems treat them differently.

Can I change a SKU after creating it?

Technically yes, but it's not recommended. Changing SKUs can break inventory history, mess up reporting, and cause issues with sales channels. Plan your SKU structure carefully before assigning codes to products.