How to Make a Barcode for Free (EAN, UPC, Code 128: Which One to Use?)
July 11, 2026
Sometimes it’s confusing to know which type of barcode to use for products, inventory, or labels, and how to create one for free. A barcode isn’t just a single standard, so you must choose the one that fits your purpose to ensure the scanner reads it properly. We’ve compiled the differences between barcode types, how to choose based on your needs, free creation options, and tips for printing and scanning.
Determine the Barcode Type First
barcode types vary based on the information they contain and their use. Here are the main ones:
| Type | Use | Features |
|---|---|---|
| EAN-13 | Retail products (global standard) | 13-digit number. The barcode you see in stores |
| UPC-A | North American retail | 12-digit number. Cousin of EAN |
| Code 128 | Logistics, inventory, labels | Can contain numbers and letters, high information capacity. Suitable for internal management |
| Code 39 | Industry, asset management | Simple and compatible with older systems |
| QR Code | Links, information (2D) | Square. A different branch that contains URLs or Wi-Fi information |
What to Use
If you’re attaching it to products for distribution, EAN-13 is the retail standard. However, if you’re actually distributing it to stores, you need an officially issued product code. A barcode created with random numbers may look the same, but it’s not the real code that identifies the product. For internal inventory or asset management, Code 128 is a good choice. It can contain not only numbers but also letters and has a high information capacity, allowing you to freely add management numbers. If the purpose is to convey links or information, use QR Code instead of a barcode.
How to Create for Free
Toolio Barcode Generator: Select a type (EAN, UPC, Code 128, etc.) and enter a value to generate a barcode immediately. You can download it as a printable image, and it is created in the browser without any installation, sign-up, or watermark.
How to Print and Scan Properly
Most of the time, if your generated barcode cannot be scanned, it is due to an issue during the printing process. Just follow three rules.
First, ensure there is enough margin. The barcode needs empty space (Quiet Zone) on both sides so the scanner can recognize the start and end of the barcode. If you cut it too close to other designs, it won’t be readable. Second, print it at a sufficient resolution. If you print something that looks small on the screen, the barcode may become blurry and spread out, reducing the recognition rate. Export it at a resolution that matches the size you will print. Third, maintain good contrast. Black bars on a white background are standard. Color backgrounds or light-colored bars are common causes of scanning failure.
What to Check When Scanning Fails
First, check if there is enough margin, if the print is blurry or smeared, and if the contrast between the background and the bars is sufficient. Next, confirm that the barcode type is compatible with the scanner. For example, a 2D-only scanner will not be able to read a 1D barcode. Also, check if the number of digits in the value matches the specifications. For example, EAN-13 requires 13 digits, and UPC-A requires 12 digits. If the number of digits doesn’t match, the barcode may not be generated at all or may not be scannable.
Summary
Choosing the right barcode type for your purpose is half the battle. For retail use, choose EAN; for internal management, choose Code 128; for transmitting links, choose QR. Once you’ve chosen the type, you can create it immediately using the free generator. When printing, just ensure you follow the rules for margin, resolution, and contrast. If you need to organize labels or documents together, also refer to how to combine images into a PDF.
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