---
title: "Barcode Generator"
description: "Generate Code 128, Code 39, EAN-13, EAN-8, and UPC-A barcodes in your browser. The retail formats compute the check digit for you. Set bar width, height, and colors, then download as PNG or SVG."
url: https://findutils.com/generate/barcode-generator/
category: generate
---

# Barcode Generator

Generate Code 128, Code 39, EAN-13, EAN-8, and UPC-A barcodes in your browser. The retail formats compute the check digit for you. Set bar width, height, and colors, then download as PNG or SVG.

**Use this tool:** [Barcode Generator](https://findutils.com/generate/barcode-generator/)

## Programmatic access

- REST id `barcode-generator`: POST https://api.findutils.com/api/tools/barcode-generator/execute (reference: https://findutils.com/api/barcode-generator/)
- MCP tool `barcode_generator` on https://mcp.findutils.com (reference: https://findutils.com/mcp/barcode-generator/)

## Why Use Barcode Generator?

Barcodes are essential for inventory management, product labeling, shipping, and point-of-sale systems. Our generator creates high-quality, scannable barcodes in popular formats like Code 128 and Code 39, ready for printing or digital use.

## Tips for Better Barcodes

- Use Code 128 for most general-purpose applications because it is compact and supports the full ASCII character set.
- Always test your printed barcode with a scanner before mass printing to ensure readability at your chosen size.
- Maintain a quiet zone of at least 10 times the narrowest bar width on both sides of the barcode for reliable scanning.
- Print barcodes in black on a white background for maximum contrast. Avoid colored backgrounds that reduce scan accuracy.
- Set bar height to at least 15% of the barcode width or a minimum of 0.5 inches for dependable scanning across devices.

## Frequently Asked Questions

### What's the difference between Code 128 and Code 39?

Code 128 is more compact and supports the full ASCII character set, making it ideal for shipping and logistics. Code 39 is simpler, supports alphanumeric characters, and is widely used in manufacturing.

### Can I use these barcodes commercially?

Yes, the barcodes generated work without signup for any purpose, including commercial applications.

### What resolution should I use for printing?

For best scanning results, use a bar width of at least 2-3 pixels and ensure your printer outputs at 300 DPI or higher.

### Why won't my barcode scan?

Ensure adequate contrast, sufficient size (at least 0.5" height), and clean printing. Test with multiple scanner apps if needed.

### What characters can I encode?

Code 128 supports all ASCII characters (letters, numbers, symbols). Code 39 supports uppercase A-Z, 0-9, and some special characters (-., $, /, +, %, space).

### What is the difference between EAN-13 and UPC?

EAN-13 uses 13 digits and is the international retail standard used primarily outside North America. UPC uses 12 digits and is the standard in the United States and Canada. EAN-13 is a superset of UPC, so most modern scanners read both formats.

### Do I need a GS1 membership to use these barcodes?

If you are selling products in retail stores, you need a GS1-assigned company prefix to create valid EAN or UPC barcodes. For internal use like inventory tracking or asset tagging, you can use Code 128 or Code 39 with any data you choose without a GS1 membership.

### What barcode format should I use for Amazon FBA?

Amazon FBA typically requires FNSKU barcodes in Code 128 format. You can enter the FNSKU identifier into this generator, select Code 128, and print labels that meet Amazon's requirements.

### Can I create barcodes in bulk?

This tool generates one barcode at a time, which works well for small batches and testing. For high-volume batch generation, consider using a spreadsheet to prepare your data and generating each barcode individually.

### Is my data safe when generating barcodes here?

Yes. All barcode generation happens in your browser using JavaScript. No data is sent to any server. Your product codes, identifiers, and text remain completely private on your device.

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