Tools/URL/Barcode Generator

Barcode Generator

Free Barcode Generator

Generate high-quality 1D barcodes instantly. Create CODE128, EAN-13, EAN-8, UPC, ITF-14, and Pharmacode barcodes with our free, offline, client-side barcode maker.

Multiple Formats: Supports CODE128, EAN, UPC, MSI, Pharmacode
Customizable: Change colors, margins, size, and text display
Offline Ready: 100% client-side processing

Why generate barcodes here?

Generating barcodes for real products means getting the format and check digits exactly right — an invalid EAN/UPC simply won't scan at a register. This tool validates input against each format's rules as you type and renders the barcode client-side, so you can iterate quickly without uploading product data anywhere.

Formats and customization

Retail formats: EAN-13, EAN-8, and UPC for retail product barcodes
General-purpose formats: CODE128, ITF-14, MSI, and Pharmacode for logistics and internal use
Visual customization: Adjust bar color, background, margins, and human-readable text display

How to Use

Enter the barcode content
Select the desired barcode format
Customize colors and dimensions
Download the barcode as a PNG image

💡 Pro Tips

For retail products, use EAN-13 or UPC with the exact number assigned to that product — these formats include a check digit, so arbitrary numbers won't scan correctly at checkout.
CODE128 accepts any alphanumeric text and is a good default for internal tracking codes that don't need to match a retail standard.

Glossary

CODE128: A high-density barcode format that can encode any ASCII character, commonly used for shipping and internal tracking.
EAN / UPC: Retail product barcode standards (European Article Number / Universal Product Code) that encode a manufacturer and product number plus a check digit.
Check Digit: A final digit calculated from the rest of a barcode's numbers, used to detect scanning or entry errors — this is why not every number sequence produces a valid EAN/UPC barcode.
Quiet Zone: The blank margin required on either side of a barcode for scanners to reliably detect where the code starts and ends.

Frequently Asked Questions about Barcode Generator

The Barcode Generator supports CODE128 (auto-encoding), EAN-13, EAN-8, UPC, ITF-14, MSI, and Pharmacode.

Yes! The tool generates high-quality PNG images that you can customize in size and color. For best scanning results, it is recommended to keep high contrast (e.g., black bars on a white background).

No. The Barcode Generator utilizes a client-side library to render barcodes directly on your device, ensuring complete privacy and offline functionality.

Formats like EAN-13 and UPC include a check digit calculated from the rest of the number — if you type an arbitrary number that doesn't satisfy that check, the tool will flag it as invalid rather than generate a barcode that won't scan.

Use EAN-13 (or UPC for US/Canada) with the exact number assigned to that product by a GS1-registered barcode. For internal tracking codes that don't need to match a retail standard, CODE128 accepts any alphanumeric text.

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