What is FNSKU? (Amazon Barcode Explained for Beginners)
If you're selling on Amazon FBA, you've probably seen the term FNSKU and wondered:
👉 Is it different from UPC or EAN?
👉 Do I really need it?
Let’s break it down simply.
What is FNSKU?
FNSKU stands for Fulfillment Network Stock Keeping Unit.
It’s a unique barcode used by Amazon to track your products inside their fulfillment centers.
FNSKU vs UPC vs EAN
- UPC / EAN → Provided by manufacturers
- FNSKU → Generated by Amazon
👉 The key difference:
FNSKU is unique to your seller account
Why Amazon Recommends FNSKU
Using FNSKU helps:
- Avoid product mix-ups
- Prevent other sellers from using your listing
- Keep inventory separated
When Should You Use FNSKU?
You should use FNSKU if:
✔ You’re doing private label
✔ You want full control over inventory
✔ You use Amazon FBA
Common Mistakes
❌ Using UPC instead of FNSKU
❌ Printing low-quality labels
❌ Wrong barcode size
How to Generate a Barcode Easily
If you need a quick way to generate barcodes for your products, you can use this:
👉 https://barkodkarekod.com/en/ean13-barcode-generator.html
No signup, runs in your browser.
Final Thoughts
FNSKU might seem confusing at first, but it's actually simple:
👉 It’s just Amazon’s way of uniquely identifying your product.
If you're selling on Amazon, are you using FNSKU or UPC?
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