Business Tools
Barcode Generator
Create barcodes online for free. Generate UPC, EAN, Code 128, QR codes and more. Free barcode maker for products and inventory.
Use Barcode Generator to get instant results without uploads or sign-ups. Everything runs securely in your browser for fast, reliable output.
Your results will appear here.
About this tool
Our Barcode Generator Calculator helps you create various types of barcodes for products, inventory management, asset tracking, and more.
Barcodes encode data in machine-readable format for fast scanning. Different types serve different purposes: UPC for retail, Code 128 for shipping, QR for links.
This tool helps you generate the right barcode type with proper specifications for your specific use case.
Usage examples
Product UPC Barcode
Create UPC barcode for retail product
Input: 12-digit UPC code → Output: Standard UPC-A barcode
Shipping Label Barcode
Generate Code 128 for package tracking
Input: Tracking number → Output: Code 128 barcode for shipping label
Inventory Management
Create Code 39 for warehouse tracking
Input: SKU code → Output: Code 39 barcode for inventory
Book ISBN Barcode
Generate ISBN barcode for books
Input: 13-digit ISBN → Output: EAN-13 barcode for book cover
Small Product Labels
Create small Data Matrix codes
Input: Serial number → Output: 2D Data Matrix for tiny labels
How to use
- Enter the data to encode in the barcode
- Select barcode type (UPC, EAN, Code 128, etc.)
- Choose size and format options
- View barcode specifications and download
Benefits
- Generate multiple barcode types
- Support for UPC, EAN, Code 128
- Customizable size and format
- High-resolution output
- Print-ready barcodes
- Bulk generation support
- Fast and accurate
FAQs
What barcode type should I use?
UPC-A/EAN-13 for retail products, Code 128 for shipping and inventory, Code 39 for non-retail, QR codes for URLs and complex data, ISBN for books. Choose based on your industry standards and scanning requirements.
How do I get a UPC code?
UPC codes must be purchased from GS1, the official barcode organization. Each company gets a unique manufacturer ID prefix. Costs vary by number of products. Never use random or fake UPC codes for retail products.
What size should my barcode be?
Standard UPC: 1.469" × 1.02" (37.3 × 25.9 mm). Minimum recommended size varies by type. Ensure adequate white space (quiet zone) around barcode for scanning. Larger is better for reliability.
Can I use the same barcode for multiple products?
No, each unique product needs its own unique barcode. Using duplicate barcodes causes inventory tracking errors and checkout problems. Even different sizes/colors of the same product need separate codes.
What resolution do I need for printing barcodes?
Minimum 300 DPI for laser/thermal printers, 600 DPI recommended for professional labels. Low resolution causes scanning failures. Always test printed barcodes with multiple scanners before mass production.
Why won't my barcode scan?
Common issues: insufficient quiet zone (white space), low print quality, damaged/wrinkled label, wrong barcode type, incorrect data format, poor scanner angle. Ensure high contrast and adequate size.
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