Barcode Generator

Barcodes are machine-readable representations of data that use patterns of parallel lines (bars) and spaces of varying widths to encode numbers, letters, and special characters. The concept dates back to 1952, when Norman Joseph Woodland and Bernard Silver patented the first barcode design — a set of concentric circles inspired by Morse code. It took another two decades before laser scanners made barcodes practical for everyday commerce, and in 1974 a pack of Wrigley's chewing gum became the first product scanned at a checkout counter using a Universal Product Code (UPC). Today, barcodes remain the backbone of global supply chains, retail operations, and asset tracking systems, with billions scanned every single day.

1D Barcodes vs. 2D Barcodes

All the formats supported by this tool are one-dimensional (1D) barcodes, sometimes called linear barcodes. They encode data in a single horizontal row of bars and spaces. A scanner reads them by measuring the relative widths of those bars. Two-dimensional (2D) barcodes — such as QR codes and Data Matrix — store data in both horizontal and vertical dimensions, which allows them to hold far more information in a smaller space. While 2D codes are growing in popularity, 1D barcodes remain the industry standard for product identification, shipping labels, and inventory management because of their simplicity, proven reliability, and universal scanner compatibility.

Understanding Each Barcode Format

• Code 128 — A high-density alphanumeric symbology that can encode all 128 ASCII characters. It is the most versatile format and is widely used for shipping labels (GS1-128), packaging, and general-purpose identification. If you are unsure which format to choose, Code 128 is usually the safest bet.
• Code 39 — One of the earliest alphanumeric barcode standards, Code 39 supports uppercase letters A–Z, digits 0–9, and a handful of special characters (-, ., $, /, +, %, and space). It is commonly used in the automotive industry, defense logistics (LOGMARS), and healthcare. Code 39 barcodes are wider than Code 128 for the same data, so they need more label space.
• EAN-13 — The European Article Number is the global standard for retail product identification. Every EAN-13 barcode contains exactly 13 digits: a country prefix, a manufacturer code, a product code, and a check digit. If you enter 12 digits, the check digit is calculated automatically. You will find EAN-13 on virtually every consumer product sold outside North America.
• UPC-A — The Universal Product Code is the North American equivalent of EAN-13 and encodes exactly 12 digits (11 data digits plus a check digit). UPC-A is a subset of EAN-13 with a leading zero, so every UPC-A barcode can also be represented as an EAN-13. It is the standard for retail products in the United States and Canada.
• ITF-14 — Interleaved Two of Five 14 is designed for outer shipping cartons and cases rather than individual retail items. It encodes exactly 14 digits and features thick bearer bars on all four sides to protect against misreads during high-speed conveyor scanning. ITF-14 is used extensively in warehouse and logistics environments.

How This Tool Works

This barcode generator runs entirely in your browser using JsBarcode, an open-source JavaScript library. When you type data into the input field, the tool validates it against the selected format's rules — for example, verifying that EAN-13 input contains exactly 12 or 13 digits — and renders a live SVG preview in real time. You can fine-tune the bar width, overall height, font size, and whether to display human-readable text beneath the bars. When you are satisfied, click Download PNG for a raster image suitable for web use, or Download SVG for a resolution-independent vector file ideal for professional printing. No data ever leaves your device.

Common Use Cases

• Inventory management — Label stock items with Code 128 or Code 39 barcodes for fast warehouse scanning.
• Retail product labeling — Print EAN-13 or UPC-A barcodes for point-of-sale checkout.
• Shipping & logistics — Use ITF-14 on outer cartons and Code 128 on individual parcels.
• Asset tracking — Assign unique barcode labels to equipment, tools, or IT hardware.
• Library systems — Code 39 is a long-standing choice for book and media identification.
• Event badges & tickets — Generate scannable barcodes for attendee check-in.

Frequently Asked Questions

Whether you are printing labels for a small business, generating barcodes for a logistics operation, or building a prototype that requires scannable codes, this free, browser-based barcode generator has you covered — five industry-standard formats, real-time preview, full customization, and instant PNG and SVG downloads, all without leaving your browser.