A barcode encoding library supporting over 50 symbologies including Code 128, Data Matrix, USPS OneCode, EAN-128, UPC/EAN, ITF, QR Code, Code 16k, PDF417, MicroPDF417 ...

As a consumer, it’s easy to take barcodes for granted. In-store shoppers can bring an item to a register, and a cashier can effortlessly scan the barcode image on the product packaging. As a seller, ...

On Amazon, UPC codes must always total 12 digits (GTIN-12): 11 digits, plus that “check digit.” Your “check digit” is calculated by GS1 based on the previous 11 digits of your barcode. The barcode ...