Barcode Generator

Free Online Barcode Generator

Our free barcode generator creates industry-standard barcodes instantly in your browser. Supporting ten popular formats including Code 128, Code 39, EAN-13, UPC-A, ITF-14, and Pharmacode, this tool is built for retailers, warehouse managers, developers, and anyone who needs reliable barcodes for products, inventory, or shipping labels.

Barcodes are machine-readable representations of data used across virtually every industry. From retail checkout counters to hospital supply chains, barcodes enable fast, accurate data capture that reduces human error and speeds up operations. Our generator supports both numeric-only formats like EAN and UPC as well as alphanumeric formats like Code 128 and Code 39.

Every barcode is rendered client-side on an HTML canvas element with customizable bar width, height, font size, and margin settings. You can download the result as a high-quality PNG image or copy it directly to your clipboard. No sign-up, no server processing, and no usage limits.

Key Features

• Ten barcode formats: Code 128, Code 39, EAN-13, EAN-8, UPC-A, UPC-E, ITF-14, MSI, Pharmacode, and Codabar
• Adjustable bar width from 1px to 5px for precise sizing
• Configurable bar height from 50px to 200px
• Optional human-readable text display below the barcode
• Customizable font size and margin settings
• Real-time preview that updates as you type or change settings
• Input validation for format-specific requirements (digit count, character sets)
• One-click download as PNG image
• Copy barcode image directly to clipboard
• Fully client-side generation — your data stays private

How to Use the Barcode Generator

1. Enter your data: Type the text or numbers you want to encode in the input field.
2. Select a format: Choose the barcode format that matches your use case (e.g., EAN-13 for retail products, Code 128 for general use).
3. Adjust appearance: Fine-tune bar width, bar height, font size, and margins using the slider controls.
4. Toggle text display: Check or uncheck the option to show the encoded value below the barcode.
5. Preview and verify: Review the live preview to ensure the barcode looks correct.
6. Download or copy: Click Download to save as PNG, or Copy to send the image to your clipboard.

Use Cases

• Retail product labeling: Generate EAN-13 or UPC-A barcodes for product packaging and point-of-sale scanning.
• Inventory management: Create Code 128 barcodes for warehouse shelves, bins, and asset tags.
• Shipping & logistics: Produce ITF-14 barcodes for outer cartons and shipping containers.
• Library systems: Use Codabar or Code 39 for book and media cataloging.
• Healthcare: Generate Pharmacode barcodes for pharmaceutical packaging and tracking.
• Event ticketing: Add barcodes to tickets and passes for automated entry scanning.
• Manufacturing: Label parts and assemblies with unique identifiers for production tracking.
• Small business: Implement a simple barcode system without expensive software or subscriptions.

Frequently Asked Questions

Tips & Best Practices

• Match format to use case: Always select the barcode symbology that your scanner or point-of-sale system expects.
• Verify digit counts: Formats like EAN-13 and UPC-A require exact digit lengths including the check digit.
• Print at high resolution: Use a bar width of at least 2px and export at the largest practical size for clean print output.
• Test with a scanner: Always scan your generated barcode with the target reader before printing in bulk.
• Maintain quiet zones: Leave adequate white space on both sides of the barcode so scanners can detect the start and stop patterns.
• Use monospace font for text: The built-in text display uses a monospace font for accurate alignment with the bars above.