What Is a Barcode Generator?
A barcode generator encodes numbers or text into the vertical-line patterns scanners read at checkout, warehouses, and libraries. This free tool supports CODE128 (flexible alphanumeric), EAN-13 (13-digit retail barcodes), and UPC formats — preview in your browser and use for mockups, QA, and internal labels.
How to Use the Barcode Generator
- Enter your value or number in the input field.
- Select the barcode format (CODE128, EAN-13, or UPC).
- Click Generate to render the barcode preview.
- Use COPY or download options as shown in the results area.
Barcode Formats Explained
- CODE128: General-purpose; encodes letters and numbers. Common for shipping labels and internal SKUs.
- EAN-13: 13-digit European Article Number used worldwide on retail products.
- UPC: 12-digit Universal Product Code common in North American retail.
For ISBN publishing barcodes, use our ISBN Barcode Generator. For inventory SKU strings, try the SKU Generator.
Who Uses This Tool?
- E-commerce sellers testing label layouts before printing
- Developers building POS or inventory apps needing sample barcodes
- Students and trainers learning retail scanning workflows
- Small businesses prototyping product packaging
Key Features
- CODE128, EAN-13, and UPC formats
- Instant browser preview
- Free unlimited generation
- No signup required
Frequently Asked Questions
Is this barcode generator free?
Yes — generate and preview barcodes at no cost.
Which format should I use?
Use EAN-13 or UPC for retail product mockups; CODE128 for internal logistics and alphanumeric codes.
Are these barcodes registered with GS1?
No. This tool creates visual barcodes for testing and design. Official retail distribution requires valid GS1 company prefixes.
Can I print these on labels?
Yes for internal use and prototypes. Verify scan quality with your printer and scanner before production runs.
What is the difference between barcode and QR code?
Barcodes are 1D lines read by laser scanners; QR codes are 2D squares read by cameras. Use our QR Code Generator for URL and text QR images.