Barcode Generator

How to use Barcode Generator

  1. Enter the value to encode and choose a barcode format (e.g., Code 128, EAN-13, UPC-A) matching what your scanner or system expects.
  2. The barcode renders instantly.
  3. Download it as an image to print on labels or packaging.

Limitations

  • Formats like EAN-13/UPC-A require a specific digit count and valid check digit — the tool validates this, so an error usually means the input number itself isn't a valid code for that format.

About this tool

Barcode Generator is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.

Category: Developer Tools. Browse more Developer Tools tools.