Barcode / Code 39 / Code 128

Barcode Generator

Generate real, scannable Code 39 and Code 128 barcodes as SVG — entirely in your browser.

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Code 39 accepts A–Z, 0–9, space and - . $ / + %. Code 128-B accepts printable ASCII. Generation is entirely local; no value is uploaded.

Real Code 39 / Code 128 Encoding

Both formats are generated using their real bar-width tables and checksum rules — Code 128-B's checksum is computed with the genuine mod-103 algorithm, and Code 39 uses each character's actual narrow/wide bar pattern. These are real, scannable barcodes.

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The SVG is built entirely client-side from the pattern tables — the text you enter never leaves your browser.