UPC-A Barcode Maker — GS1-Certified Format for US Retail Generate GS1-ready UPC-A barcodes, validate or auto-calculate the check digit, and download crisp PNG/SVG—right in your browser. What is a UPC-A Barcode Maker and why it matters A UPC-A Barcode Maker is a simple, standards-aware utility that converts a 11- or 12-digit product number into a scannable UPC-A (Universal Product Code) symbol used across US retail. The UPC-A symbology is defined by GS1 and remains the mainstream barcode on store shelves in the United States and Canada. With this tool, you can enter an 11-digit number and automatically compute the required check digit—or paste a full 12-digit UPC and instantly verify that the check digit is valid—then export clean artwork as PNG or SVG . Why is this important? Point-of-sale scanners and inventory systems rely on correctly encoded barcodes. A single wrong digit or a blurry image can cause checkout delays...