Code 128 Barcode Complete Guide

Code 128 is a high-density linear barcode symbology widely used in logistics, packaging, and industrial applications.

What are ASCII Characters?

Before diving into Code 128, let's understand ASCII characters. The ASCII character set contains 128 characters (numbered 0-127), divided into:

1. Control Characters (0-31 and 127):

• These characters are invisible on screen
• Examples: line feed, tab, etc.

2. Visible Characters (32-126):

• Space and punctuation (32-47): space ! " # $ % & ' ( ) * + , - . /
• Numbers (48-57): 0 1 2 3 4 5 6 7 8 9
• Uppercase letters (65-90): A-Z
• Lowercase letters (97-122): a-z
• Other punctuation: @ [ \ ] ^ _ { | } ~

Basic Features

• High-density encoding
• Variable length
• Full ASCII support
• Automatic check digits

How to Generate

1. Visit Barcode Maker
2. Enter content
3. Generate barcode
4. Download image

Conclusion

Code 128 is a flexible and reliable barcode format.