How to Use a Linear Barcode Generator: Step-by-Step Guide

Generating a barcode is quick once you know which format your data needs. Here's the full process.

Step-by-Step: Creating Your Barcode

1. Decide what data you're encoding — a product ID, an internal serial number, a URL, or plain text.
2. Choose a barcode format that matches your data type (see the note below on picking the right one).
3. Enter your data into the generator.
4. Preview the result to confirm it looks correct.
5. Download the barcode image and place it into your label, document, or packaging design.

Picking the Right Format Before You Start

Not every format accepts every kind of data. EAN-13 requires exactly 13 numeric digits with a specific check-digit structure — it won't accept letters or arbitrary text. CODE128, on the other hand, accepts the full ASCII character set, making it the more flexible general-purpose choice for internal IDs, asset tags, or anything that isn't a standardized retail product code. If your data is numeric and tied to an actual retail product, EAN-13 is likely correct; for internal or general-purpose labeling, CODE128 is usually the safer default.

A Print-Quality Tip

Once generated, don't shrink the barcode below a reasonable minimum size for your printer's resolution — bars that are too thin to print cleanly won't scan reliably, no matter how correct the underlying data is. If you're not sure, print a test copy and scan it with the actual device you'll be using before committing to a full batch.