Barcode Generator - Free Code128 Creator Online

A barcode generator is an online tool that converts text or numbers into a scannable pattern of bars and spaces. Our generator creates Code128 barcodes that work with any standard 1D laser or camera scanner for inventory, shipping, and product labeling.

Code128 is a high-density alphanumeric barcode that encodes all 128 ASCII characters. Use it for internal SKUs, warehouse bins, shipping labels, asset tags, and logistics — anywhere you need letters and numbers. Don't use it for retail products that require UPC or EAN at checkout.

Yes. It's completely free with no signup, no email required, no watermarks, and no usage limits. You can generate unlimited barcodes for personal or commercial use.

No. Everything runs 100% in your browser. Your data never leaves your device, which makes it faster and more private than server-based generators.

You get two formats: SVG (vector, infinitely scalable for print design) and PNG (high-DPI raster at 3× scale, perfect for thermal label printers, Word, or PDFs). You can also copy the SVG code directly.

Use high contrast (black bars on white background), set bar width to 2x or 3x, keep the quiet zone at 10mm or more, avoid scaling the image disproportionately, and test print at actual size. Ensure your scanner supports Code128 (most do).

For most desktop scanners, use height 50–80px and module width 2x. For small labels, don't go below 30px height and 1x width. For warehouse scanning from distance, use 100px+ height and 3x width. Always test with your actual scanner.

AUTO intelligently switches between Code Set B (for text) and Code Set C (for digit pairs) to create the shortest barcode. B encodes all letters, numbers and symbols. C encodes only digits but packs two digits into one symbol, making it 50% shorter for long numbers. AUTO is best for 99% of uses.

The most common causes are: low contrast, barcode too small, quiet zone cropped off, blurry printing, or using an unsupported character. Try increasing bar width to 3x, ensure white background, print at 300 DPI or higher, and verify your data uses only standard ASCII characters.

You can use Code128 for Amazon FBA box labels, internal inventory, and warehouse bins. You cannot use Code128 as the primary product barcode for retail checkout — that requires a GS1-registered UPC or EAN. Always check your marketplace requirements.

No. The entire encoding process happens locally in your browser using JavaScript. We don't see, store, or transmit the text you enter. Close the page and the data is gone.