A barcode is a machine-readable representation of data, encoded as parallel lines or a grid pattern that scanners can read instantly. Retail products use EAN-13 or UPC-A barcodes for point-of-sale checkout. Shipping and logistics rely on Code 128 for its high data density and alphanumeric support. Industrial asset tags often use Code 39, a legacy standard still widely deployed in government and manufacturing. This tool generates print-ready PDF labels in all four formats entirely in your browser — no data is uploaded to any server. The scan line of each barcode is computed locally, so generation speed does not depend on network latency.
This generator is designed for speed, privacy, and zero setup. Choose from four barcode formats — Code 128, EAN-13, UPC-A, or Code 39 — then enter your data and download a print-ready PDF. Batch generate up to 200 labels on a single A4 sheet, arranged in a grid matching your chosen label size (2"×1", 2.5"×1", 3"×1", or 4"×2.5"). Everything runs client-side using JsBarcode and pdf-lib, so no data ever leaves your device. No signup, no watermark, no ads — just open the page and start generating barcodes immediately. The preview updates live as you type, so you can verify a value renders correctly before you commit to a batch download.