Free Barcode Generator
What Is the Barcode Generator?
The Barcode Generator on All Unit Tools is a comprehensive, free online utility that creates professional-quality barcodes for business, retail, inventory management, and personal use. From simple product labels to complex industrial tracking systems, this tool transforms text, numbers, or product codes into scannable barcode images instantly.
This tool solves the need for quick, accessible barcode creation without expensive software or specialized knowledge. Whether you're a small business owner, warehouse manager, developer, or student, you can generate barcodes in various formats that work with standard scanners and inventory systems.
Who Uses Barcode Generators?
Barcodes are essential in modern business operations, retail, logistics, and data management. Our tool serves a wide range of users who need efficient, accurate barcode creation for various applications.
Retail Businesses
Create product barcodes for inventory management, pricing, and point-of-sale systems. Label merchandise for efficient checkout and stock tracking.
Warehouse & Logistics
Generate shipping labels, tracking codes, and inventory barcodes for efficient receiving, storage, picking, and shipping operations.
Developers & IT Teams
Generate barcodes for application testing, system integration, database entries, and software development projects requiring barcode functionality.
Libraries & Archives
Create barcodes for book tracking, asset management, and catalog systems. Efficiently manage collections and check-in/check-out processes.
Educators & Students
Create barcodes for classroom organization, laboratory samples, educational projects, and learning about automatic identification technologies.
Office Administration
Generate barcodes for file tracking, asset management, document control, and employee ID badges in corporate environments.
How to Generate Barcodes in 4 Easy Steps
Select Barcode Type
Choose from popular formats like Code 128, Code 39, EAN-13, UPC-A, QR Code, or Data Matrix. Each type serves different purposes and industries.
💡 Code 128 for general use, EAN-13 for retail products
Enter Your Data
Type the text, numbers, or product codes you want to encode. For retail products, enter valid UPC or EAN numbers with proper check digits.
Example: "PROD001234" or "5901234123457" for EAN-13
Customize Appearance
Adjust size, color, resolution, and text display. Choose whether to show the encoded text below the barcode and select optimal dimensions for your use case.
Higher resolution for printing, smaller for digital use
Download & Use
Download your barcode as PNG, SVG, or PDF. PNG for digital use, SVG for vector/scalable needs, PDF for professional printing. Test scanning before mass production.
Always test scan with your equipment before finalizing!
Supported Barcode Types
📦 Code 128
High-density linear barcode capable of encoding all 128 ASCII characters. Widely used in shipping, packaging, and general inventory applications.
Best for: Shipping labels, inventory tracking
🛒 EAN-13
13-digit European Article Number used worldwide for retail products. Includes country code, manufacturer code, product code, and check digit.
Best for: Retail products, consumer goods
🏷️ UPC-A
12-digit Universal Product Code standard in North America. Used for scanning trade items at points of sale in retail stores.
Best for: North American retail products
🔢 Code 39
Alpha-numeric barcode that can encode 43 characters. Widely used in non-retail environments like manufacturing, military, and automotive.
Best for: Industrial applications, asset tracking
📱 QR Code
Two-dimensional matrix barcode that can store URLs, contact info, Wi-Fi credentials, and other data. Scannable by smartphones.
Best for: Marketing, mobile interactions, URLs
📄 Data Matrix
Two-dimensional barcode that can store large amounts of data in a small space. Used for small item labeling and electronics manufacturing.
Best for: Small items, electronics, healthcare
Common Barcode Applications
Retail Product Labeling
Create EAN-13 or UPC barcodes for products in stores. Essential for inventory management, pricing, and point-of-sale scanning at checkout counters.
Tip: Verify check digit calculations for retail barcodes
Shipping & Logistics
Generate Code 128 barcodes for shipping labels, tracking numbers, and package identification. Crucial for warehouse management and delivery tracking.
Tip: Use high contrast for reliable scanning in warehouses
Asset Tracking
Create unique barcodes for company equipment, computers, furniture, and tools. Enables efficient inventory audits and asset management.
Tip: Use durable labels for long-term asset tracking
Library Management
Generate barcodes for books, media, and library cards. Streamlines check-in/check-out processes and inventory management in educational institutions.
Tip: Include both barcode and human-readable text
Event Tickets & Badges
Create unique barcodes for event tickets, conference badges, and membership cards. Enables quick check-in and prevents duplication.
Tip: Use sequential numbering for ticket tracking
Healthcare & Laboratory
Generate barcodes for patient samples, medication labels, and medical records. Ensures accurate tracking and reduces human error in critical environments.
Tip: Use Data Matrix for small sample containers
Key Features of Our Barcode Generator
🔤 Multiple Barcode Formats
Generate Code 128, Code 39, EAN-13, UPC-A, QR Code, Data Matrix, and more. Each format optimized for specific use cases and industries.
🎨 Full Customization
Adjust size, color, resolution, and text display. Choose foreground/background colors and optimize for your specific scanning environment.
📥 Multiple Download Formats
Download as PNG (for digital use), SVG (vector/scalable), or PDF (for professional printing). Choose the format that best suits your application.
🔍 High Resolution Output
Generate high-resolution barcodes suitable for professional printing. Maintains clarity and scannability even at small sizes or when enlarged.
📱 Mobile-Optimized
Generate barcodes on any device. Perfect for creating labels on-the-go or testing barcodes directly from your smartphone or tablet.
💾 No Installation Needed
Access directly from any browser—no software to download, no accounts to create. Bookmark it for instant access whenever barcode needs arise.
Frequently Asked Questions
What's the difference between 1D and 2D barcodes?
1D barcodes (like Code 128, UPC) are linear, storing data in parallel lines of varying widths. They typically hold 20-25 characters. 2D barcodes (like QR Code, Data Matrix) store data in both vertical and horizontal patterns, allowing them to hold hundreds to thousands of characters, including URLs, contact info, and more complex data.
Do I need a special scanner for different barcode types?
Most modern barcode scanners are omnidirectional and can read multiple 1D barcode types automatically. For 2D barcodes (QR Codes, Data Matrix), you need a 2D imager scanner or smartphone camera. Check your scanner's specifications to ensure compatibility with your chosen barcode format.
Can I use generated barcodes for commercial products?
For internal use (inventory, asset tracking), yes. For retail products requiring UPC or EAN barcodes for sale in stores, you need officially registered numbers from GS1 (for EAN/UPC). Our generator can create the barcode image from your registered numbers, but doesn't provide official registration.
What resolution should I use for printing?
For professional printing, use 300 DPI (dots per inch) minimum. For labels that will be scanned from a distance, you may need larger sizes. Always test print a sample and scan it with your equipment before mass production to ensure reliability.
How do I ensure my barcodes scan reliably?
Use high contrast (dark bars on light background), adequate quiet zones (empty space on both sides), proper sizing for scanning distance, and test with your actual scanning equipment. Avoid reflective surfaces and ensure barcodes aren't distorted during printing or application.
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