Learn barcodes
Practical answers for people putting a barcode on a real product: where the numbers come from, which format you need, how big to print it, and how to check it before the print run.
Where barcode numbers come from, why you need a GS1 number for retail, the risks of resold barcodes, and how to turn your number into a print-ready barcode.
UPC-A and EAN-13 explained side by side: digits, regions, how one converts to the other, and which to print on your packaging.
Standard and minimum print sizes for EAN-13, UPC-A, EAN-8, ITF-14, Code 128 and QR codes, plus quiet zones, colors and PNG resolution.
Free check digit calculator for GTIN-8, UPC-A (GTIN-12), EAN-13, ITF-14 (GTIN-14) and SSCC. Calculate or validate the last digit and see the calculation.
Code 128 and Code 39 compared: character sets, barcode width, check characters, and which to choose for inventory, asset tags, shipping and industry labels.
How big a logo can be in a QR code, which error correction level to use, color and contrast rules, and how to test a branded QR code before printing.
How an ISBN becomes an EAN-13 barcode, where to get an ISBN, the 978 and 979 prefixes, the 5-digit price add-on, and where to put the barcode on the cover.
What an FNSKU is, how it differs from your UPC or EAN, how to print FBA labels, label sizes, and when you can print the FNSKU barcode on your own packaging.