Barcodes are the foundation of modern retail, manufacturing, logistics, and inventory management. They represent numbers or letters in parallel lines of varying widths, allowing optical scanners to identify products or assets in milliseconds.
In this guide, we explain the easiest way to generate custom barcodes online and choose the correct format for your business requirements.
3 Quick Steps to Create a Barcode Online
To create standard-compliant barcode images, use our universal Barcode Generator:
- Input Your Code Data: Type your serial numbers, product codes, or alphanumeric text into the input box.
- Select the Symbology (Format):
- Choose Code 128 for general inventory, serial codes, or alphanumeric asset tagging.
- Choose EAN-13 for physical consumer products globally (excluding USA/Canada).
- Choose UPC-A for retail products distributed in North America.
- Configure Dimensions and Text:
- Adjust bar width and overall barcode height to fit your physical labels.
- Choose whether to display human-readable text below the stripes.
- Download High-Resolution Output: Get your barcode as a PNG or vector SVG file instantly.
Understanding Common Barcode Types
A “barcode” is not just one format. There are various standard layouts (known as symbologies):
- 1D Barcodes (Linear): Composed of vertical stripes. Examples include Code 128, EAN-13, and UPC-A. They store limited characters (typically 12 to 30) but are highly compatible with legacy laser scanning guns.
- 2D Barcodes (Matrix): Composed of square pixels (e.g., QR codes). They store thousands of characters and can be scanned in any direction, even by camera lenses.
Best Practices for Printing Barcodes
If you are printing barcode labels for physical storage or retail checkout, keep these guidelines in mind:
- Maintain a Quiet Zone: Leave ample blank white space (at least 5mm) to the left and right of the barcode stripes so the scanner knows where the symbol begins and ends.
- Choose High Contrast: Use black ink on a white background. Red laser scanners “see” red as white, so printing red bars on a white background makes the barcode invisible to the sensor.
- Avoid Glossy Material: Glossy laminates can reflect laser light and blind the scanner sensor. Use matte papers or labels.
Frequently Asked Questions (FAQ)
Can I generate a barcode for standard products using this tool?
Yes, you can generate the graphic images here. However, to legally register EAN-13 or UPC-A numbers to sell products in retail stores, you must register them formally with an official authority like GS1.
What is the difference between PNG and SVG downloads?
PNG is a raster graphic (made of pixels) which can look blurry if resized too large. SVG is a vector format (calculated via lines) that stays perfectly sharp and crisp at any print scale. For professional physical labels, always prefer SVG.
Can I encode letters (A-Z) in all barcodes?
No. Retail symbologies like EAN-13 and UPC-A only support numbers (0-9). If you need to encode letters or special characters, you must select Code 128.