How to Generate Barcodes? EAN/UPC/CODE128 One-Click Creation

Have You Encountered These Scenarios?

Products need barcodes for shelf display, but you don't know how to generate them:

• New products launching, packaging needs barcodes
• E-commerce platforms require product barcodes
• Inventory management needs barcode labels
• DIY products need professional barcodes

"What is a barcode? How to quickly generate standard barcodes?"

Barcodes are product "ID cards", scan to get product info. Today we'll show you how to easily generate various standard barcodes.

Why Do Products Need Barcodes?

Barcodes are essential in modern commerce:

1. Product Identification One scan identifies the product, no manual input needed, efficiency up 90%+.

2. Inventory Management Supermarkets and warehouses quickly count inventory via barcodes, error rate greatly reduced.

3. Sales Checkout Cashiers scan to checkout, 10x faster than manual input.

4. Supply Chain Tracking Full tracking from production to sales, anti-counterfeit and anti-channel conflict.

5. Global Standard EAN/UPC barcodes globally recognized, essential for export products.

6. E-commerce Listing Amazon, eBay, Taobao require standard barcodes for products.

Comparison of Four Barcode Generation Methods

Several mainstream methods exist to generate barcodes:

Method 1: Online Barcode Generators (Recommended)

Advantages:

• No installation needed, instant use
• Mostly free
• Multiple barcode formats supported
• Adjustable size and style

Disadvantages:

• Some tools lack precision
• Batch generation may be limited

Recommended: eazydocument Barcode Generator

• Completely free
• EAN-13, UPC-A, CODE128 and more
• Local processing, no data upload
• Customizable size and color

Method 2: Professional Barcode Software

Advantages:

• Full features
• Batch generation
• High precision

Disadvantages:

• Expensive (hundreds to thousands)
• Need installation and learning
• Regular users don't need

Method 3: Printing Company Services

Advantages:

• Professional printing
• Includes design

Disadvantages:

• High cost
• Long turnaround
• Can't modify instantly

Method 4: Excel Plugin Generation

Advantages:

• Convenient batch generation
• Data management integrated

Disadvantages:

• Requires Excel skills
• Plugin may be paid

Best Solution: Use eazydocument Barcode Generator

After comparison, we strongly recommend eazydocument Barcode Generator:

Core Advantages

1. Multiple Format Support

• EAN-13: European/international 13-digit product code
• UPC-A: North American 12-digit product code
• CODE128: Industrial standard, encodes any character
• CODE39: Logistics format
• ITF: Packaging box format

2. Local Processing, Data Safe Your product data processed locally in browser, never uploaded to servers. Product codes are business secrets.

3. Adjustable Parameters

• Barcode width and height customizable
• Color customization
• Text annotation optional

4. Completely Free No hidden fees, no generation limits.

Step-by-Step Guide

Step 1: Select Barcode Format Based on purpose:

• Product retail: EAN-13 or UPC-A
• Warehouse logistics: CODE128
• Packaging boxes: ITF

Step 2: Input Barcode Content

• EAN-13: 12 digits (check digit auto-generated)
• UPC-A: 11 digits
• CODE128: Any characters

Step 3: Set Parameters

• Adjust barcode size
• Select color (default black/white)
• Show or hide numbers

Step 4: Generate Barcode Click generate button, instant barcode image.

Step 5: Download and Use Download PNG image for:

• Packaging design
• Label printing
• E-commerce upload

Common Barcode Format Guide

Advanced Tips: Barcode Application Best Practices

Barcode generation isn't just drawing lines, proper use requires attention:

1. Barcode Size Standards

Standard EAN-13 width 37.29mm, height 25.93mm. Magnification factor 0.8-2.0 acceptable.

2. Print Quality Requirements

Clear printing required, blank areas must be clean. Use 300dpi+ resolution.

3. Product Code Application

Official product sales require GS1 manufacturer identification code application, this is the barcode prefix.

4. Check Digit Calculation

EAN-13 last digit is check digit, tool auto-calculates, no manual input needed.

5. Barcode Color

Default black bars white background most reliable. Other colors may cause scan failure.

6. Blank Area Preservation

Barcode sides need sufficient blank area (at least 5mm), otherwise may not scan.

7. Batch Label Printing

For large quantities, use Excel for batch data generation, then print with label software.

Frequently Asked Questions (FAQ)

Q1: What's the difference between EAN and UPC?

EAN is European standard (13 digits), UPC is North American standard (12 digits). EAN globally used, UPC mainly in US/Canada.

Q2: Can I create barcodes freely?

Personal testing yes, but official product sales need GS1 manufacturer identification code to avoid conflicts with existing products.

Q3: Why won't generated barcode scan?

Common reasons: size too small, print blurry, wrong color, insufficient blank area, wrong barcode type.

Q4: CODE128 or CODE39?

CODE128 more efficient encoding, more compact density, recommended first. CODE39 suits specific industry standards.

Q5: Can barcodes encode Chinese?

EAN/UPC only digits. CODE128 encodes all ASCII characters, Chinese needs special handling.

Q6: How much does GS1 application cost?

China GS1 about 2000-3000 RMB/year, includes manufacturer ID and 1000 product codes.

Q7: What image format for barcodes?

PNG most universal, high clarity. JPG may have compression loss, not recommended.

Q8: How to batch generate barcodes?

Use Excel to list all codes, copy to generator one by one, or use professional batch software.

Conclusion

Product barcode generation is actually simple:

✅ Online tools best choice—free, instant, no installation ✅ eazydocument supports multiple formats, adjustable, data safe ❌ Professional software expensive, learning cost high ❌ Printing services high cost, long cycle ❌ Excel plugins requires skills

Next time you need product barcodes, open eazydocument, select format, enter code, done in minutes.

Related Tools:

• QR Code Generator - Generate QR codes
• Image Compress - Compress barcode images
• Image Format Convert - Convert barcode formats