Why is Code 128 widely used for logistics?

It is extremely compact, supports dual-density numeric pairing (Code 128C), and has built-in modulo 103 error checking.

Can standard handheld laser scanners read these barcodes?

Yes, Code 128 is supported natively by virtually 100% of commercial laser and optical barcode scanners.

How large should I print the barcode?

Ensure the narrowest bar (X-dimension) is at least 0.25mm (0.01 inches) wide for reliable handheld scanner reading.

QR & Barcode Tools• Code 128

Code 128 Barcode Generator (Alphanumeric 1D)

Code 128 is the industry gold standard for shipping containers, packaging labels, and asset identification. Generate crisp, scanner-compliant Code 128 barcodes with automatic checksum calculation.

Rendered client-side via vector SVG. Zero barcode strings stored.

CODE 128 BARCODE GENERATOR

Alphanumeric Code

Bar Width (px)

Bar Height (px)

Display Human-Readable Label Below

Code Color

#000000

Background

#ffffff

Sponsored PlacementGoogle AdSense Integration Ready

How to Use Code 128 Barcode Generator

Input Alphanumeric Text

Enter any SKU, serial number, or alphanumeric tracking code.

Customize Barcode

Adjust bar width, height, and human-readable text display.

Download Barcode

Download vector SVG for thermal printers or PNG for digital documents.

About Code 128 Barcode Generator

Encodes alphanumeric characters into patterns of 3 bars and 3 spaces totaling 11 module units per character, with automatic start code, modulo 103 check digit, and stop code.

Supported Formats

SVGPNG

Operational Limits

•Only supports standard 128 ASCII characters; does not support Unicode characters.

Key Features

Full Code 128 alphanumeric character set (128 ASCII characters)
Automatic modulo 103 checksum computation
Adjustable bar width, quiet zones, and height
Toggle human-readable text label below bars
Scalable vector SVG and high-DPI PNG export

Frequently Asked Questions

Code 128 can encode all 128 standard ASCII characters, including letters (A-Z, a-z), numbers (0-9), punctuation, and control characters.

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