Barcode Generator — Create Barcodes Online Free

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How to use Barcode Generator

Enter your data — the number or text to encode.
Choose the barcode type — Code 128 for internal use, EAN/UPC for retail.
Generate and download the barcode image.
Print at adequate size and contrast — with quiet space around it for reliable scanning.

What is Barcode Generator?

A barcode generator creates scannable barcodes from your data — the striped codes on products, packages and labels that scanners read to look up information. You enter the number or text; it produces the barcode image in the format you need (Code 128, EAN-13, UPC-A and others), ready to print or use.

Barcodes encode data as machine-readable bars, powering retail checkout, inventory management, shipping and asset tracking. Different types suit different uses — retail products use EAN/UPC, internal inventory and shipping often use the flexible Code 128 — and generating the right type correctly is what makes them scan reliably.

About the Barcode Generator

Enter your data, choose the barcode type, and generate a scannable barcode to download and print.

Which type when: Code 128 — versatile, encodes letters and numbers, ideal for internal inventory, asset tags, shipping labels and general use (the go-to when you're not selling in retail); EAN-13 — the 13-digit retail barcode used on products worldwide (requires a registered manufacturer number for real retail); UPC-A — the 12-digit retail standard in North America; and Code 39 — an older alphanumeric format still used in some industrial and government contexts.

Practical notes: for INTERNAL use (your own inventory, asset tracking, warehouse labels), generate any format with any data you like — you control the scanning system, so the codes just need to be unique and consistent. For RETAIL sale through stores, EAN/UPC numbers must be officially assigned (via GS1) — you can't just make them up, or they'll collide with real products; generate the barcode from your assigned number, not an invented one. Print at adequate size and contrast (barcodes need quiet space around them and sharp printing to scan reliably). Pair with our QR generators for QR codes (which hold more data and are better for URLs/contact info than 1D barcodes).

Frequently Asked Questions

Code 128 for internal inventory, asset tags and shipping (flexible, alphanumeric). EAN-13 or UPC-A for retail products (but these need officially assigned numbers). Code 39 for some industrial/legacy contexts. Code 128 is the safe default for your own systems.

No — retail EAN/UPC numbers must be officially assigned through GS1, or they'll collide with existing products and get rejected by retailers. Generate the barcode FROM your assigned number. For internal-only use, any number works since you control the system.

Barcodes (1D, striped) hold a small amount of data (usually a number) and suit product/inventory scanning. QR codes (2D) hold much more (URLs, text, contact info) and are read by phone cameras. For products use barcodes; for URLs and rich data use QR.

Usually size, contrast or quiet space — barcodes need sharp printing, good dark-on-light contrast, adequate size, and blank "quiet zones" on the sides. Blurry, tiny, low-contrast, or cramped barcodes fail. Print larger and cleaner.

To create them, no — just this generator. To USE them (look up scanned codes), you need a system that maps the codes to your data: retail POS software, inventory management, or a spreadsheet you scan into. The barcode is just the scannable ID; the system behind it does the rest.