Barcode Generator: Create a Barcode Online for Free

Need to turn a product number into a scannable barcode? You don't need design software. You don't need a printing service. Our barcode generator does the job right in your browser.

Choose a format. Enter your data. Download a barcode ready for labels, packaging, or internal tracking.

This online barcode generator is built for retailers assigning UPC codes to new products. It's built for warehouse teams labeling inventory. It's built for anyone who wants a fast, reliable way to make barcodes without paying for dedicated software.

There's no account to create. No watermark gets added. And there's no limit on how many barcodes you generate.

What Is a Barcode?

A barcode is a pattern of parallel lines. The lines vary in width and spacing. Together, they represent data in a machine-readable format.

Each combination of thick and thin bars stands for a specific letter, number, or symbol. The exact rules depend on which barcode standard is being used.

Here's how scanning works. A scanner passes light across the barcode. It measures the pattern that bounces back. Then it converts that pattern into the original data.

That's why a barcode on a cereal box scans instantly at checkout. It's why a shipping label scans just as fast at a warehouse station. Nobody has to type a single digit.

Different industries need different things from a barcode, which is why several formats exist side by side.

• •Retail products typically use UPC or EAN formats. These store a fixed number of digits tied to one specific product.
• •Shipping and inventory systems often use Code-128. It can encode letters and numbers together, which makes it more flexible for internal reference numbers.
• •Pharmaceutical packaging uses its own distinct format, built for the equipment found on production lines.

This barcode generator supports nine formats in total. That means you can match the type to whatever your project actually needs.

How Barcode Numbers Are Structured

Retail barcode formats like UPC-A and EAN-13 aren't random strings of digits. Each number breaks down into clear segments.

• •One portion identifies the manufacturer or brand owner.
• •Another portion identifies the specific product.
• •A final check digit catches data entry or scanning errors.

This structure is why businesses selling through major retailers usually register their numbers through GS1. You can't just invent a number on your own. The manufacturer portion has to be officially assigned, so it never overlaps with another company's product identifier.

Internal formats work differently. Code-128 and Code-39 don't follow this same structure. They're typically used for a business's own tracking, not shared retail systems. That gives you more freedom to design a numbering scheme that fits your own inventory.

How to Create a Barcode

Creating a barcode with this tool takes just a few steps.

One more detail worth knowing: for EAN-13, EAN-8, and UPC-A formats, the tool calculates the check digit for you. Just enter the digits your product actually has. That's 12 digits for EAN-13, 7 for EAN-8, or 11 for UPC-A. The correct final digit gets added automatically.

Why Use an Online Barcode Generator?

Generating a barcode through a browser-based tool comes with real advantages over installing dedicated labeling software.

• •Speed. There's no software to download. No license to configure. Select a format, type your data, and your barcode appears right away.
• •Accessibility. Since the tool runs in a browser, it works the same way on a laptop, a tablet, or any device with internet access. You don't need a specific operating system or an installed app.
• •No cost barrier. A free barcode generator removes the expense of dedicated software. This matters most for businesses that only need to generate codes occasionally, or for anyone testing a new product line before investing in a bigger labeling system.
• •Format flexibility. This single tool supports nine barcode types. You won't need to hunt down a separate generator every time your data doesn't fit the one format you already know.
• •Local processing. All the generation work happens directly in your browser. That means the numbers and codes you enter, including internal SKUs or unreleased product identifiers, are never sent to or stored on a remote server.

Barcode Use Cases

Barcodes show up across a wide range of industries. Here's how businesses typically put a barcode generator to use, and why the right format matters for each situation.

Barcode Generator Features

Here's what's actually available in this barcode generator. Nothing here is invented or planned; this is what you can use today.

• •Nine barcode formats — Code-128, Code-39, Code-93, Code-11, EAN-13, EAN-8, UPC-A, MSI, and Pharmacode
• •Adjustable dimensions — control bar width, height, and overall size to match your label
• •Font and margin control — set the text size beneath the barcode and the surrounding whitespace
• •Custom colors — choose background and line colors for the finished barcode
• •Optional text display — show or hide the human-readable number below the bars
• •Automatic checksum calculation — EAN-13, EAN-8, and UPC-A formats get their check digit calculated for you
• •Multiple download formats — export as PNG, JPG, or SVG
• •Print, copy, and share — print directly from the browser, copy to your clipboard, or share the file
• •Client-side processing — your data stays on your device and is never transmitted to a server

Each format has its own data requirements. Code-128 accepts letters, numbers, and symbols, up to 80 characters. EAN-13, EAN-8, and UPC-A only accept numeric data of a fixed length. The tool checks your entry against these rules before generating anything, so you'll know right away if something doesn't match.

Format Comparison at a Glance

Are Barcodes Static or Dynamic?

Some QR codes can point to a redirect link that updates after printing. Barcodes don't work that way. They're inherently static.

The data gets encoded directly into the pattern of bars itself. Once a barcode is generated, that data is fixed. This applies whether it represents a UPC number, a Code-128 tracking reference, or a Pharmacode value. There's no version of a barcode that points to an external, editable destination.

This means the barcode generator on this site always produces a permanent, self-contained code. If a product number changes, or a batch code needs updating, there's only one correct approach: generate a new barcode and replace the old label. You can't edit the destination behind an existing one, because there isn't one to edit.

For most retail, inventory, and shipping applications, this is exactly how a barcode is supposed to work. The number itself is the identifier. It's not a link to something else.

Barcode Best Practices

A barcode is only useful if it scans reliably every time. Even a technically correct barcode can fail in the real world. It might be printed too small. It might sit on the wrong surface. It might lack enough contrast. A few habits go a long way toward avoiding these problems.

• •Match the format to your use case. Use EAN-13 or UPC-A for retail products sold through standard point-of-sale systems. Use Code-128 for internal inventory or shipping labels that need more flexible data.
• •Keep strong contrast. Dark bars on a light background scan best. Avoid low-contrast color combinations, even if they look fine on a screen. Scanners depend on a clear difference between the bars and the background.
• •Size it correctly. Code-128 barcodes should be printed at least 1 inch wide. EAN-13 has an official minimum size of roughly 29.83mm by 20.73mm. Printing smaller than these thresholds raises the risk of failed scans, especially with older or lower-quality scanners.
• •Leave a clear margin. The blank space on either side of a barcode is called the quiet zone. It helps scanners detect where the code starts and ends. The margin setting in this tool controls that space directly.
• •Test before a full print run. Generate one sample first. Print it. Scan it with a handheld scanner or a smartphone barcode app. Only then commit to printing hundreds of labels.
• •Use SVG for printing. SVG is a vector format, so it stays sharp at any size. This matters most when your barcode will be printed larger than it appears on screen.
• •Avoid printing on curved or reflective surfaces when possible. Barcodes printed directly onto glossy packaging or curved bottle labels are more prone to glare and distortion. If a curved surface is unavoidable, orient the barcode so the bars run parallel to the curve, not across it. This small adjustment reduces distortion during scanning.

Frequently Asked Questions

Explore Our Barcode Blog

Generating a barcode is often just the starting point. Our barcode blog covers what comes next.

You'll find guidance on choosing the right format for a new product line. You'll find tips on printing barcodes correctly across different label materials. You'll find help troubleshooting codes that won't scan, along with side-by-side comparisons of barcode formats for specific industries.

There's more beyond that too: practical guides on setting up a basic inventory system with barcodes, tips for getting a UPC number for a new product, and reviews of other barcode generator tools available online.

Whether you're labeling your first batch of products or building out a full warehouse tracking system, the blog goes deeper into the details this page only introduces.

Ready to get started? Head back up to the generator. Pick your format. Create your barcode in the next few seconds. No account, no cost, and no limit on how many you make.