Free Barcode Generator

Create custom barcodes and QR codes instantly online. No software download required. Supports all major 1D and 2D formats for labels, packaging, and digital use.

Data to Encode

Barcode Format

Display Options

Bar Width: 2

Height: 100px

Show human-readable text

Enter data and select a format to generate a barcode

Barcode Format Guide

Code 128

General purpose, alphanumeric

Code 39

Industrial, alphanumeric

EAN-13

Retail products (13 digits)

UPC-A

Retail products (12 digits)

QR Code

2D code, high capacity

Data Matrix

2D code, compact

Quick Examples

How the Barcode Generator Works

Our barcode generator creates scannable barcodes in multiple formats including Code 128, Code 39, EAN-13, UPC-A, QR Code, and Data Matrix. The tool uses the BWIP-JS (Barcode Writer in Pure JavaScript) API to generate high-quality barcode images that comply with industry standards.

Step-by-Step Process

Enter the data you want to encode (text, numbers, or product codes)
Select the appropriate barcode format based on your use case
Customize display options including bar width, height, and human-readable text
The generator validates your input against format-specific requirements
A high-resolution PNG barcode image is generated instantly
Download the barcode for printing or digital use

Each barcode format has specific encoding rules and character set limitations. Code 128 supports full ASCII characters, while EAN-13 and UPC-A are numeric-only formats used primarily in retail. QR Codes and Data Matrix are 2D barcodes capable of storing significantly more data in a compact space.

Common Use Cases

Product Labeling

Generate EAN-13 or UPC-A barcodes for retail products. These formats are required by most retailers and point-of-sale systems worldwide.

Inventory Management

Create Code 128 barcodes for warehouse inventory tracking, asset management, and stock control systems.

Shipping Labels

Generate barcodes for package tracking, shipping manifests, and logistics documentation using Code 128 or Code 39 formats.

Marketing Materials

Create QR codes that link to websites, product information, or promotional content for print and digital marketing campaigns.

Document Management

Add barcodes to files, folders, and documents for efficient tracking and retrieval in office environments.

Event Ticketing

Generate unique barcodes for event tickets, admission passes, and access control systems.

What to Know Before Using This Tool

Format Selection Guidelines

EAN-13: Requires exactly 12 or 13 digits; used for retail products globally
UPC-A: Requires exactly 11 or 12 digits; primarily used in North American retail
Code 128: Supports all ASCII characters; ideal for general-purpose applications
Code 39: Supports alphanumeric characters; common in industrial and automotive sectors
QR Code: 2D format supporting URLs, text, and large data; readable by smartphones
Data Matrix: Compact 2D format for small items and electronics marking

Printing Considerations

For reliable scanning, ensure barcodes are printed at sufficient resolution (minimum 300 DPI) and size. The minimum recommended width for 1D barcodes is 26mm. Maintain adequate quiet zones (blank space) on both sides of 1D barcodes.

Data Validation

EAN-13, UPC-A, and ISBN barcodes include check digits for error detection. The generator validates these automatically. For retail products, you must obtain official barcode numbers from GS1 or authorized resellers.

Frequently Asked Questions

What is the difference between 1D and 2D barcodes?

1D barcodes (like Code 128, EAN-13) store data in horizontal bars and spaces, typically holding 20-25 characters. 2D barcodes (like QR Code, Data Matrix) store data in both horizontal and vertical patterns, capable of holding thousands of characters including URLs, contact information, and binary data.

Can I use generated barcodes for commercial products?

For retail products, you must obtain official GS1 barcode numbers. This generator creates technically valid barcodes, but using unregistered EAN/UPC codes on retail products may cause issues with retailers and supply chain partners. For internal use (inventory, asset tracking), generated barcodes work perfectly.

What file format are the barcodes?

Barcodes are generated as PNG images, which provide lossless compression ideal for barcode clarity. PNG format preserves the sharp edges necessary for reliable scanning.

How do I determine the right barcode size?

Size depends on scanning distance and printer capability. For handheld scanners at close range, minimum width of 26mm works well. For conveyor scanning or longer distances, use larger sizes. Always test scan printed barcodes before mass production.

Can I customize the barcode colors?

This generator produces standard black-on-white barcodes for maximum compatibility. For colored barcodes, ensure high contrast between bars and background. Dark bars on light backgrounds work best; avoid red bars as many scanners use red lasers.

What is human-readable text in barcodes?

Human-readable text displays the encoded data below or within the barcode. This allows manual entry if the barcode becomes damaged or unscannable. Most retail and shipping standards require human-readable text.

Are QR codes better than traditional barcodes?

QR codes store more data and are smartphone-readable, making them ideal for consumer-facing applications. Traditional 1D barcodes are faster to scan in high-volume retail and warehouse environments. Choose based on your specific use case and scanning equipment.

Other Free Tools

Search tools