Free Barcode Generator Online

Use Code 128 for compact internal identifiers when the receiving software supports it. Code 39 is common in older workflows but has a more limited character set and generally requires more horizontal space.

EAN-13, EAN-8 and UPC-A are fixed-length retail formats. The generator can calculate or validate a check digit, but it cannot assign a legitimate product identifier or confirm that a number belongs to your company.

Do not stretch the barcode in one direction after export. Preserve the blank margin on both sides and use strong dark-on-light contrast. Decorative backgrounds, rounded clipping and low-resolution screenshots can change the bars enough to cause intermittent reads.

Choose SVG when artwork will be resized in design software. Use PNG only at the required output dimensions, and avoid recompressing it through messaging or office applications before printing.

Print a sample using the actual printer, label stock, ink or thermal settings and finishing process. Scan it with the same hardware and software used at checkout, receiving or inventory, not only a phone application.

For retail products, obtain the identifier through the appropriate GS1 organization and follow the retailer’s size and placement requirements. Keep a record of the approved number and artwork revision before producing labels in volume.