What barcode symbology is used?

This tool uses Code 128B, which encodes the full set of printable ASCII characters (space through tilde). It is one of the most efficient and widely supported linear barcode formats.

Can scanners read the generated barcode?

Yes, as long as it is printed or displayed at sufficient resolution and contrast. Standard laser and CCD barcode scanners handle Code 128 natively.

Does the tool add a checksum?

Yes. Code 128 requires a weighted modulo-103 check character, which this tool calculates automatically and appends before the stop symbol.

Barcode Generator

Generate Code 128 barcodes from text and download as PNG.

Text (printable ASCII)

Show text below barcode

Code 128B — encodes printable ASCII (space through tilde). Includes weighted modulo-103 checksum.

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FAQ

What barcode symbology is used?: This tool uses Code 128B, which encodes the full set of printable ASCII characters (space through tilde). It is one of the most efficient and widely supported linear barcode formats.
Can scanners read the generated barcode?: Yes, as long as it is printed or displayed at sufficient resolution and contrast. Standard laser and CCD barcode scanners handle Code 128 natively.
Does the tool add a checksum?: Yes. Code 128 requires a weighted modulo-103 check character, which this tool calculates automatically and appends before the stop symbol.

The Barcode Generator encodes printable ASCII text into a Code 128B barcode rendered on an HTML5 canvas. Code 128 is widely used in logistics, retail, and document management. The tool computes the start symbol, character encodings, checksum, and stop symbol, then draws the resulting bar pattern. Download the barcode as PNG for printing or embedding.