Barcode Generator

This encoding tool converts alphanumeric text into machine-readable linear barcodes using standardized symbologies like Code 128, UPC-A, EAN-13, or Code 39. The generator translates input strings into specific bar/space patterns where varying bar widths and sequences encode data according to chosen barcode standard specifications, rendering the result as scalable graphics suitable for printing and scanning.

Each symbology employs distinct encoding rules: Code 128 supports full ASCII character sets through complex multi-mode encoding switching between numeric, alphanumeric, and full ASCII modes for optimal density. UPC and EAN require specific digit counts with manufacturer and product codes plus check digit calculation using weighted modulo algorithms. The tool implements checksum computation automatically, appending verification digits that scanners use to confirm scan accuracy and detect corrupted reads.

Barcode rendering occurs through SVG path generation where each bar becomes a precise vector rectangle, ensuring crisp output at any scale from small labels to large signage. Width adjustment (X-dimension modification) controls bar thickness affecting scan distance and reliability - narrow bars suit high-resolution printers while thicker bars accommodate lower-quality printing or longer scanning distances. The generator includes quiet zones (mandatory blank margins), human-readable text below symbology, and height adjustment balancing compact presentation against scan reliability. Users can download SVG for infinite scalability or PNG raster images at specified DPI resolutions for immediate printing on label stock.