Barcode Generator
Generate Code128 and Code39 barcodes from any text or number. Download as PNG for printing or digital use.
How to Use the Barcode Generator
- Enter data -- Type the text or numbers you want to encode in the barcode.
- Choose format -- Select Code 128 (supports all ASCII) or Code 39 (uppercase, digits, and some symbols).
- Select height -- Pick Small, Medium, or Large barcode height.
- Generate -- Click the button to render the barcode on screen.
- Download -- Click "Download PNG" to save the barcode as an image file.
About Barcodes
Barcodes are machine-readable representations of data using patterns of parallel lines of varying widths. They were first patented in 1952 and have become ubiquitous in retail, logistics, healthcare, and manufacturing. Linear (1D) barcodes like Code 128 and Code 39 encode data in a single row of bars.
Code 128 is a high-density symbology that can represent all 128 ASCII characters, making it versatile for shipping labels, inventory management, and product identification. Code 39 is an older but widely supported format that encodes uppercase letters, digits, and a handful of special characters. This tool generates barcodes entirely in your browser using the HTML5 Canvas API -- no server processing required.
Frequently Asked Questions
Code 128 is a high-density linear barcode symbology that can encode all 128 ASCII characters. It is widely used in shipping, packaging, and supply chain management due to its compact size and high reliability.
Code 39 is one of the earliest barcode symbologies, supporting uppercase letters A-Z, digits 0-9, and special characters (-.$/+% and space). It is commonly used in government and manufacturing applications.
Yes. Click the "Download PNG" button to save the generated barcode as a PNG image. The image includes the barcode and the text label beneath it.