Barcode Generator
barcode• Create barcodes in many formats: Code128, EAN-13, UPC, and more. • Adjust bar width, height, and colors; download as PNG or SVG.
Everything is processed in your browser and never sent to a server.
Code 128 · any text
How barcodes are used
A barcode turns numbers or letters into bars of differing width so a scanner can read them. A machine reads it instantly and without error, which is why barcodes are used wherever a mistake costs money — stock control, asset tags, shipping labels.
The format depends on the job. EAN-13 on retail packaging holds exactly 13 digits and the US UPC holds 12, while CODE128 takes letters, digits and symbols at any length, which suits internal reference numbers. If the digit count does not match, nothing is generated — so check the format first.
When printing, size and margins decide whether it scans. Shrink it too far and the bars merge; drop the quiet zone on either side and the scanner cannot find the start. The image is generated in your browser and your input is never sent to a server.