Barcode Generator

How to use the barcode generator

1. Choose the barcode type for your use.
2. Enter the value — the example shows the expected format.
3. Download as SVG for print or PNG for screens.

About this tool

Different barcode symbologies exist for different jobs. Code 128 encodes any text and is the right choice for internal use — asset tags, shelf labels, your own stock system. EAN-13 and UPC-A are the retail formats printed on products, and Code 39 persists in logistics and defence because old scanners still read it.

The checksum is handled for you: enter 12 digits for EAN-13 and the check digit is calculated, which is the step people usually get wrong by hand.

One thing worth being clear about: generating a barcode does not register a product. Retail EAN and UPC numbers are allocated by GS1 for a fee, and a number you invent will scan happily while potentially colliding with a real product somewhere. For anything sold through retailers, buy the number; for anything internal, Code 128 needs no registration at all.

Common uses

• Labelling equipment or stock internally.
• Producing a scannable code for a shelf label.
• Rendering an existing product number as a barcode.

Frequently asked questions

Can I invent my own EAN or UPC number?

It will scan, but retail numbers are allocated by GS1 to be globally unique. An invented one can clash with a real product. For internal use, Code 128 avoids the issue entirely.

Which format should I choose?

Code 128 for anything internal — it takes letters and numbers. EAN-13 or UPC-A only if you have a real allocated retail number.

Why does my number get rejected?

Each symbology has strict length and character rules: EAN-13 wants 12 or 13 digits, UPC-A 11 or 12, and Code 39 accepts uppercase letters, digits and a few symbols only.