Barcode Generator

How it works

The generator uses JsBarcode to render barcodes in real time on a canvas. Each format has its own validation rules — the calculator highlights errors immediately. Code 128 accepts any ASCII; EAN/UPC require 12–13 digits; Code 39 is uppercase letters and digits.

Frequently asked

Which barcode format should I use?

Code 128 is the most common general-purpose format. EAN-13 is for retail products with a GTIN. Code 39 is older and more limited but widely supported on legacy scanners.

How do I download the barcode?

Use the PNG button for a raster image (sharp at fixed sizes) or the SVG button for vector (scales perfectly for print).

Will my barcode work in retail?

For retail you need a GTIN issued by GS1, encoded as EAN-13 or UPC-A. Numerly only renders the visual barcode — it does not assign you a real-world product code.