在线条码生成器 / Online Barcode Generator

Welcome to Barcode Zone

Barcode Zone (barcode.zone) is an online platform focused on barcode technology and applications. We provide a free, professional, and easy-to-use online barcode generator supporting Code128, Code39, and QR Code, with customizable size, font, font size, and text display options.

Whether you are a retailer printing product labels, a warehouse manager generating inventory codes, or a developer producing test barcodes in batch, Barcode Zone delivers an efficient and convenient solution.

Barcode Technology Basics

A barcode is a machine-readable representation of information in the form of parallel bars or a matrix. It encodes numbers, letters, and symbols that scanners can read quickly, enabling automatic data capture and tracking.

Barcode technology originated in the 1940s. In 1974, the first UPC-labeled product was scanned in a US supermarket, marking the beginning of commercial barcode use. Today, barcodes are widely used in retail, logistics, manufacturing, healthcare, libraries, and ticketing.

Common 1D symbologies include Code128, Code39, EAN-13, and UPC-A. Code128 supports the full ASCII set and offers high density, ideal for industrial and logistics applications. Code39 is simple and easy to print, commonly used internally. QR Code, a 2D symbology, provides large capacity, strong error correction, and 360-degree readability, widely used in mobile payments, traceability, and marketing.

Learn more on our Barcode Knowledge page or compare formats on the Barcode Types page.