Generate code 128

Generate a dense Code 128 barcode for text or numeric data.

freeworks offlinenothing uploaded
ToolCode 128 Generator
Input
Output
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Preview

How it works

Code 128 selects among character sets A, B, and C, emits start and shift symbols, calculates a weighted modulo-103 check value, and ends with a stop pattern. Set C packs numeric pairs for higher density.

  • Multiple code sets cover control characters, text, and compact numbers.

Worked example

Product Barcode
Generate a Code 128 barcode for a product SKU
Input
											Text: SKU-12345
Height: 80
Show text: true
Output

When to use this

Shipping labels, GS1-128 identifiers, and checksum tests generate Code 128.

Edge cases

  • An odd digit count in set C requires a code-set change or padding.
  • FNC1 has application meaning and is not ordinary text.
  • Quiet zones and exact module widths affect scan reliability.

References