Generate a real, scannable CODE128 barcode from any text or numbers — download as PNG instantly.
CODE128 is a widely used, high-density barcode format that can encode all 128 ASCII characters, commonly used in shipping, packaging, and inventory management.
Yes, this tool generates standard-compliant CODE128 barcodes with correct checksums, readable by any standard barcode scanner or scanning app.
This tool supports standard ASCII characters (letters, numbers, and common symbols) in the CODE128 Subset B character set.
This tool generates real, scannable CODE128 barcodes from any text or number sequence, using the standard CODE128 Subset B encoding table with a correctly calculated checksum, rendered as a downloadable PNG image.
CODE128 is one of the most widely used linear barcode formats, capable of encoding the full ASCII character set (letters, numbers, and symbols) at high density. It's commonly found on shipping labels, product packaging, and inventory tags because of its compactness and reliability. Unlike simpler formats like Code39, CODE128 includes a mandatory checksum digit calculated from the encoded data, which helps scanners detect and reject misread barcodes.
Each character you enter is mapped to a numeric value according to the CODE128 Subset B standard, and a checksum is calculated by summing each value multiplied by its position, then taking the result modulo 103 — exactly as the CODE128 specification requires. This checksum value is appended to the encoded sequence, along with mandatory start and stop patterns, ensuring the resulting barcode is standard-compliant and readable by any real barcode scanner, not just a visual approximation.
All barcode generation happens directly in your browser using Canvas rendering — your input text is never sent to a server.