How should I choose between CODE128, EAN13, and UPC-A?

Use CODE128 when the content is more flexible and may include letters, numbers, or symbols. Use EAN13 or UPC-A for retail product identifiers, depending on the format your market and existing system require.

Why does my content fail to generate a barcode?

The most common reason is that the content does not satisfy the selected format. For example, EAN13 expects 12 digits and UPC-A expects 11 digits before the check digit is added.

What is the difference between downloading PNG and SVG?

PNG is convenient for presentations, documents, and quick sharing. SVG is better for printing and later design edits because it stays sharp when scaled.

The barcode looks fine. Why can my scanner still not read it?

Common causes include using the wrong format, making the barcode too small, leaving too little quiet zone around it, or using colors with weak contrast. Test with the real scanner before finalizing output.

Can I use this for real shipping or retail barcodes?

You can use it to generate and test barcodes, but before production you should still confirm that the encoded value, barcode standard, print size, and scanner requirements all match your real workflow.

Barcode Generator

Create 1D barcodes instantly with format switching, style controls, and PNG/SVG downloads.

Report

Barcode settings

Barcode Type

Content

Bar Width

Barcode Height

Font Size

Margin

Line Color

Background

Show Text Under Barcode

File Name

Preview

Step 1

Pick a barcode type and enter your payload; when you switch formats, adjust characters and length as prompted.

Step 2

Tune bar width, height, quiet margin, line/background colors, and whether human-readable text appears.

Step 3

The preview updates on the right; use the buttons in the preview header to download PNG or SVG.

How do I choose between CODE128, EAN13, and UPC-A?

Use CODE128 for flexible alphanumeric content; use EAN13 or UPC-A for common retail identifiers, matching your market and systems.

Why does generation fail?

Usually the payload breaks format rules—for example EAN13 expects 12 digits and UPC-A expects 11 before the check digit is added.

PNG vs SVG?

PNG is great for slides, docs, and quick sharing; SVG scales cleanly for print and design tools.

The image looks fine but my scanner will not read it.

Check format choice, physical size, quiet zones, and contrast. Always validate with the real scanner you will use in production.

Can I use this for live retail or shipping labels?

It is fine for drafting and testing; before production, confirm symbology rules, sizes, and integrations with partners.

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Barcode Generator

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