Barcode & QR Code Generator

The LeanTul Barcode Generator is a free, browser-based tool that creates QR codes, barcodes, and other types of codes from your text, URLs, or data. All generation happens locally on your device using WebAssembly technology - no data is sent to our servers.

Create QR codes for websites, contact information, WiFi credentials, product barcodes for inventory, shipping labels, and more. The generated codes can be downloaded as high-quality PNG images for printing or digital use.

2D Codes (Matrix)

• QR Code: Most popular for URLs, contact info, and general data (up to 4,296 characters)
• Data Matrix: Compact code for small items and labels
• Aztec Code: Used for transportation tickets and documents
• PDF417: High-capacity stacked barcode for driver's licenses and airline boarding passes

1D Barcodes (Linear)

• Code 128: High-density barcode for shipping and logistics
• Code 39: Alphanumeric barcode for automotive and defense
• Code 93: Similar to Code 39 with higher density
• EAN-13: 13-digit product barcode used worldwide
• EAN-8: 8-digit compact version for small products
• UPC-A: 12-digit product barcode used in North America
• UPC-E: Compact 6-digit version of UPC-A
• ITF: Used for packaging and shipping cartons
• Codabar: Used in libraries, blood banks, and logistics

Step-by-Step Instructions

1. Enter Your Data: Type or paste the text, URL, phone number, or other data you want to encode
2. Select Format: Choose the type of barcode or QR code you want to create from the format dropdown
3. Generate Code: Click the "Generate" button to create your barcode
4. Download: Click the download button to save the barcode as a PNG image

Tips for Different Use Cases

• URLs: Use QR Code for websites, contact info, or social media links
• Products: Use EAN-13, UPC-A, or Code 128 for product barcodes
• Documents: Use PDF417 for storing large amounts of data
• Small Items: Use Data Matrix for compact labels on small products
• Tickets: Use Aztec Code for transportation and event tickets

• Complete Privacy: All barcode generation happens in your browser - your data never leaves your device
• 13 Formats Supported: Generate QR codes and 12 different types of barcodes
• High Quality Output: Download crisp, print-ready PNG images
• No Limitations: Generate unlimited codes with no restrictions or watermarks
• Real-time Preview: See your code instantly as you type
• Character Counter: Know exactly how much data you're encoding
• Free Forever: No registration, subscriptions, or hidden fees
• Mobile Friendly: Works on phones, tablets, and desktop computers

Business Applications

• Product packaging and labels
• Inventory management and tracking
• Shipping and logistics labels
• Document management and filing
• Event tickets and badges
• Business cards with contact info

Marketing & Personal Use

• Website URLs for marketing materials
• WiFi network credentials for guest access
• Restaurant menus (QR code menus)
• App download links
• Social media profile links
• Contact information (vCard)
• Payment links and cryptocurrency addresses

Numeric-Only Formats

• EAN-13: Requires exactly 12 or 13 digits (13th digit is checksum)
• EAN-8: Requires exactly 7 or 8 digits
• UPC-A: Requires exactly 11 or 12 digits
• UPC-E: Requires exactly 6 or 8 digits
• ITF: Requires even number of digits

Alphanumeric Formats

• Code 39: Supports letters, numbers, and some special characters
• Code 93: Similar to Code 39 with extended character set
• Code 128: Full ASCII character support
• Codabar: Numbers and limited special characters (- $ : / . +)

High-Capacity Formats

• QR Code: Up to 4,296 alphanumeric characters or 7,089 numeric characters
• PDF417: Up to 1,850 alphanumeric characters
• Data Matrix: Up to 2,335 alphanumeric characters
• Aztec: Up to 3,832 numeric or 3,067 alphanumeric characters

Your Data Stays Private

All barcode generation happens locally in your browser using WebAssembly. The text you enter and the codes you generate never leave your device. We don't see, store, or have access to any of your data.

Security Best Practices

• Verify Generated Codes: Always test your codes with a scanner before mass production
• Sensitive Data: Be cautious about encoding passwords or private information in codes that will be publicly displayed
• URL Safety: When creating QR codes for URLs, ensure the destination is safe and legitimate
• Print Quality: Ensure codes are printed clearly with sufficient contrast for reliable scanning

The Barcode Generator works in all modern browsers that support WebAssembly:

• Chrome/Edge 57+: Full support
• Firefox 52+: Full support
• Safari 11+: Full support on iOS and macOS
• Mobile Browsers: Works on Android and iOS devices

For best results, use the latest version of your browser. Older browsers may not support WebAssembly and won't be able to generate codes.

Is this generator really free?

Yes, completely free with no limitations on the number of codes, formats, or usage frequency.

Can I use the generated codes commercially?

Yes! You can use the generated codes for any purpose including commercial applications, product packaging, marketing, and more.

What image format are the codes downloaded in?

Codes are downloaded as PNG images with transparent backgrounds, perfect for printing and digital use.

Can I customize the size or color?

Currently, codes are generated in standard black on white/transparent. You can resize and recolor the PNG image using image editing software after download.

Why won't my code generate?

Common issues include: entering text when the format requires numbers only (like EAN-13), not meeting character requirements (like UPC-A needing 12 digits), or entering special characters not supported by the format.

How do I know if my code will scan properly?

After generating, download the code and test it with a smartphone scanner app or barcode reader to ensure it scans correctly before printing or distributing.

What's the difference between QR Code and other formats?

QR codes can store much more data (up to 4,296 characters) and can encode any type of text. Traditional barcodes like UPC and EAN are numeric-only and designed for specific applications like product identification.