How It Works
From connection to printing in 4 simple steps.
Connect Your Account
Click "Connect Amazon" and authorize Tru.codes through Amazon Seller Central. Takes 30 seconds.
Sync Your Inventory
We automatically pull your FBA catalog including product titles, ASINs, FNSKUs, and images.
Generate Labels
Select products and generate FNSKU labels. Choose label sizes and quantities, then print or download.
Link UPCs
Purchase UPCs directly from us and link them to your Amazon products. Track everything in one place.
Complete Amazon Integration
Everything you need to manage your FBA products and labels.
One-Click Connection
Connect your Amazon Seller Central account in seconds with secure SP-API OAuth. No API keys to manage.
Real-Time Inventory Sync
Automatically sync your FBA inventory. See all your products, ASINs, and FNSKUs in one dashboard.
FNSKU Label Generation
Generate Amazon-compliant FNSKU labels instantly. Download as PDF or print directly with Print Bridge.
Box & Shipping Labels
Create FBA box labels, shipping labels, and pallet labels. Everything you need for FBA shipments.
Multi-Marketplace Support
Connect multiple Amazon marketplaces: US, CA, MX, UK, DE, FR, IT, ES, JP, AU, and more.
UPC-to-ASIN Linking
Automatically link your purchased UPCs to Amazon ASINs. Track which products use which codes.
UPC vs FNSKU: What's the Difference?
Understanding when to use each barcode type for Amazon FBA.
UPC Code
Universal Product Code
- 12-digit universal identifier
- Required to create Amazon listings
- Works on all marketplaces globally
- Same code used by all sellers
- One-time purchase, lifetime use
FNSKU
Fulfillment Network SKU
- Amazon-specific barcode
- Required for FBA shipments
- Unique to your seller account
- Tracks your inventory specifically
- Generated automatically by Amazon
Need both? Tru.codes has you covered. Buy verified UPCs to create your Amazon listings, then generate FNSKU labels for your FBA shipments - all in one platform.
Built for Every Amazon Seller
Whether you're just starting or scaling your business.
New Amazon Sellers
Getting started with FBA? We make it easy to get UPC codes, create product listings, and generate your first FNSKU labels.
- Buy verified UPCs
- List products on Amazon
- Generate FNSKU labels
- Print labels at home
Existing FBA Sellers
Already selling on Amazon? Connect your account to sync inventory and generate labels for new shipments in seconds.
- Sync existing catalog
- Bulk label generation
- Multi-product shipments
- Order history tracking
Multi-Channel Sellers
Selling on multiple platforms? Manage your UPCs, GTINs, and product codes across Amazon, Walmart, and more.
- Universal UPC codes
- Cross-platform tracking
- Consistent product data
- Export capabilities
Frequently Asked Questions
Common questions about Amazon integration and FNSKU labels.