Barcode Generator
Generate Code 128 barcodes instantly. Customize size, download as PNG, and use for free. Everything runs in your browser — no signup required.
How to Use
- Enter the text or numbers you want to encode in the "Barcode Data" field.
- Select the barcode type. Code 128 is selected by default and supports full ASCII characters.
- Adjust the module width and bar height sliders to customize the barcode size.
- Toggle the "Show text below barcode" checkbox to display or hide the human-readable text.
- Click "Download as PNG" to save the barcode image to your device.
Frequently Asked Questions
What barcode types does this generator support?
This tool currently generates Code 128 barcodes, which is one of the most widely used barcode formats. Code 128 supports the full ASCII character set (letters, numbers, symbols, and spaces), making it suitable for product labels, shipping labels, inventory management, and general-purpose encoding.
Can the generated barcodes be scanned by standard barcode scanners?
Yes. The barcodes produced by this tool follow the standard Code 128 specification, including proper start codes, checksum digits, and stop patterns. They can be read by any barcode scanner or smartphone scanning app that supports Code 128, which includes virtually all modern scanners.
Is there a limit to how much data I can encode?
Code 128 can technically encode any length of ASCII text, but practical limits apply. Longer data produces wider barcodes that become harder to print and scan reliably. For best results, keep your barcode data under 80 characters. Most real-world uses involve 10 to 30 characters.
Can I use these barcodes for commercial purposes?
Absolutely. The barcodes generated by this tool are standard Code 128 images that you can freely use for any purpose, including commercial applications such as product packaging, inventory tracking, shipping labels, and asset management. There are no licensing restrictions.
Is my data private when generating barcodes?
Yes, completely. This barcode generator runs entirely in your browser using JavaScript and the HTML5 Canvas API. No data is sent to any server. Your input stays on your device at all times, making it safe for sensitive or proprietary information.