About Barcode Generator
Our free online barcode generator creates professional barcodes in multiple formats instantly. Whether you need barcodes for retail products, inventory management, shipping labels, or asset tracking, our tool supports all major barcode standards with customizable options.
Supported Barcode Formats
CODE128: The most versatile barcode format supporting all ASCII characters. Ideal for general purposes, shipping labels, and inventory management. Compact and efficient for alphanumeric data.
EAN-13: European Article Number with 13 digits. The standard for retail products worldwide. Includes a check digit for error detection. Required for most retail products in Europe and many other countries.
UPC-A: Universal Product Code used primarily in North America. 12-digit barcode standard for retail products. Similar to EAN-13 but with one less digit.
CODE39: Alphanumeric barcode widely used in logistics, healthcare, and government applications. Supports uppercase letters, numbers, and some special characters. Easy to print and scan.
ITF-14: Interleaved 2 of 5 with 14 digits. Used for shipping containers and cartons. Encodes the GTIN-14 (Global Trade Item Number) for logistics and distribution.
MSI: Modified Plessey code for inventory control and warehouse management. Numeric only, commonly used in retail for shelf marking and inventory tracking.
Pharmacode: Pharmaceutical binary code used in the pharmaceutical industry for packaging control. Encodes numbers from 3 to 131070.
Key Features
- 📊 7 Barcode Formats: CODE128, EAN-13, UPC-A, CODE39, ITF-14, MSI, Pharmacode
- ⚡ Instant Generation: Real-time barcode creation as you type
- 🎨 Customizable: Adjust bar width, height, and text display
- 📥 Download PNG: High-quality images ready for printing
- 📋 Copy to Clipboard: Quick copy for immediate use
- ✅ Format Validation: Automatic validation for each format
- 🔒 100% Private: All processing happens in your browser
- 📱 Mobile Friendly: Works on all devices
How to Use
- Select your desired barcode format (CODE128, EAN-13, UPC-A, etc.)
- Enter the data you want to encode
- Customize the appearance (width, height, text display)
- Preview the barcode in real-time
- Download as PNG or copy to clipboard
Common Use Cases
Retail Products: Use EAN-13 or UPC-A for product packaging and point-of-sale systems. These formats are required by most retailers and include check digits for accuracy.
Inventory Management: CODE128 or CODE39 for tracking items in warehouses, stores, or offices. These formats support alphanumeric data for flexible item identification.
Shipping Labels: CODE128 or ITF-14 for cartons and pallets. ITF-14 is specifically designed for outer packaging and logistics.
Asset Tracking: CODE39 for equipment, furniture, and IT assets. Widely supported by asset management systems.
Library Books: CODE39 or CODE128 for book identification and checkout systems.
Barcode Format Selection Guide
Choosing the Right Format:
- • Retail products: EAN-13 (international) or UPC-A (North America)
- • General purpose: CODE128 (most versatile)
- • Logistics/shipping: CODE128 or ITF-14
- • Healthcare/government: CODE39
- • Inventory/warehouse: MSI or CODE128
- • Pharmaceutical: Pharmacode
Printing Guidelines
- 📏 Size: Ensure barcodes are large enough to scan (minimum 1 inch wide)
- 🎯 Contrast: Use black bars on white background for best results
- 📐 Quiet Zone: Leave blank space around the barcode (margins)
- 🖨️ Quality: Use high-resolution printing (300 DPI or higher)
- 📄 Material: Print on smooth, non-reflective surfaces
- ✅ Testing: Always test scan before mass printing
Barcode Scanning
Barcodes can be scanned using dedicated barcode scanners, smartphone apps, or built-in camera apps on modern phones. Most retail and warehouse environments use handheld or fixed-position barcode scanners for fast and accurate reading.
Technical Specifications
- • Output Format: PNG image with transparent or white background
- • Resolution: High-quality vector-based rendering
- • Customization: Adjustable bar width (1-5px) and height (50-200px)
- • Text Display: Optional human-readable text below barcode
- • Validation: Automatic format validation and error messages
EAN-13 and UPC-A Check Digits
EAN-13 and UPC-A barcodes include a check digit calculated from the other digits. Our generator automatically validates the check digit. If you're unsure about the check digit, you can use online check digit calculators or let the system validate your input.
Privacy & Security
All barcode generation happens entirely in your browser using JavaScript. Your data is never sent to any server, stored, or logged. This tool is completely private and secure for generating barcodes with sensitive information.
💡 Pro Tip: For retail products, obtain official UPC/EAN codes from GS1 (the global standards organization). For internal use like inventory or asset tracking, CODE128 or CODE39 work great without registration!
Frequently Asked Questions
What's the difference between EAN-13 and UPC-A?
EAN-13 has 13 digits and is used internationally, while UPC-A has 12 digits and is primarily used in North America. EAN-13 can encode UPC-A codes by adding a leading zero.
Can I use these barcodes commercially?
Yes, for internal use (inventory, assets, etc.). For retail products, you need to obtain official UPC/EAN codes from GS1 to ensure uniqueness and avoid conflicts.
Which format should I use for my product?
For retail: EAN-13 (international) or UPC-A (North America). For internal use: CODE128 (most versatile) or CODE39 (widely supported).
Is this barcode generator free and private?
Yes, it is 100% free with no limits. All processing happens in your browser using JavaScript, so your data never touches our servers.