Barcode Generator
Use this free barcode generator to create a simple Code 39 barcode directly in your browser.
How to Use the Barcode Generator
Enter the text or number you want to encode, generate the Code 39 barcode, then download the PNG after checking that it scans correctly.
Practical Example
Entering INVENTORY-125 produces a Code 39 barcode that can be used as an internal label or testing identifier.
Factors That Affect the Result
Supported characters, print size, contrast, quiet-zone spacing and scanner compatibility influence whether a barcode can be read reliably.
Frequently Asked Questions
Which barcode format is generated?
The tool creates Code 39 barcodes.
Can I use letters and numbers?
Yes, Code 39 supports uppercase letters, digits and a limited set of symbols.
Can I download the barcode?
Yes, the generated barcode can be saved as a PNG image.
Choosing the Right Barcode Format
Barcodes encode data in a machine-readable pattern, but different symbologies are designed for different kinds of information. Retail products often use UPC or EAN formats, while Code 128 can represent a broader set of characters and is common in logistics and internal labeling.
Generating a Reliable Barcode
Enter data that is valid for the selected format and keep adequate blank space around the symbol so scanners can detect its boundaries. Avoid stretching, cropping, or printing at a resolution that makes bars merge together. Human-readable text can help people verify the encoded value even though scanners read the bars.
A generated image should be tested with the actual scanners and print process used in production. Creating a barcode does not register a retail product number or assign ownership of an identifier; official numbering systems may require identifiers obtained from the appropriate standards organization.