Stop getting your products rejected by Amazon and big-box retailers. Learn the anatomy of GS1 identifiers, calculate check digits, and generate print-ready retail tags.
If you are launching a new product line, you might be tempted to use a free online tool to generate a random 12-digit number and print it on your packaging. Do not do this.
Major retailers and marketplaces—especially Amazon—cross-reference every UPC and EAN against the official GS1 Global database. If the prefix of your barcode does not officially match your registered brand name, Amazon will suppress your listing, and big-box retailers will reject your inventory at the receiving dock.
The Golden Rule: You must lease a Company Prefix from GS1. Once you have your prefix, you can assign item numbers to your products and use our tools to physically render the vector barcode images.
Both serve the exact same purpose at a retail checkout, but their regional origins dictate their length.
The Universal Product Code is the dominant format in the United States and Canada. It consists of 12 digits: a company prefix, an item reference, and a check digit.
The European Article Number is the global standard outside of North America. It is structurally identical to a UPC, but includes an extra digit at the front indicating the country code.
Select your format and enter your GS1 prefix + item reference. Our algorithm will calculate the final Check Digit and render the scannable barcode.
Digital Infrastructure & Logistics Consultant, Mahwar KSA
Operating out of Riyadh, Saudi Arabia, Sohail consults for high-volume e-commerce brands navigating the complexities of omnichannel retail. He specializes in Amazon FBA compliance, GS1 catalog management, and building automated bulk barcode extraction pipelines for platforms like Shopify, Salla, and Noon.
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