Free Online Barcode Generator

Create UPC, EAN, Code 128, Code 39 and ITF-14 barcodes for products, inventory, labels and shipping. Validate your data, check common scan risks, and download print-ready SVG or PNG files — privately in your browser.

Barcode type

A flexible choice for internal SKUs, inventory and logistics.

Barcode typeBarcode data

Ready to generate.

Customize

Print width (mm)Bar height (mm)Quiet zone (modules)BarsBackground Show readable text

⌂ Your barcode data stays in your browser. No signup, watermark or upload.

Live preview

Enter valid data to preview your barcode.

Good

Barcode checks

✓ DataReady to generate.

✓ Quiet zoneRecommended left and right quiet zones are included.

• Print sizePrint size check is advisory for this format.

✓ Visual contrastVisual contrast heuristic passes. This is not professional barcode verification.

For accurate barcode size, print at 100% / Actual Size and disable “Fit to page” when your print dialog offers that option.
A 50 mm calibration line is included in the print view.

These checks catch common data, margin, size and color problems. They are not a professional barcode verification or GS1 certification service.

Mobile

Works on mobile

Create, save and share barcodes directly from your phone or tablet. No app installation is required.

Guide

Which barcode should I use?

UPC-AUS / Canada retail

EAN-13International retail

Code 128Inventory / SKU

ITF-14Shipping carton

Code 39Assets / equipment

GS1

A barcode image is not a GS1 number

ToolkitLoop creates a barcode image from data you provide. It does not issue a GS1 GTIN, official UPC, or retail identifier.

Scanability

Why won’t my barcode scan?

Wrong data, a missing check digit, reduced quiet zones, small print size, low contrast, distortion, print quality, reflective surfaces and curved packaging can all affect scanning.

FAQ

Barcode generator FAQ

Can I create a barcode for free?

Yes. You can create and download common barcode formats as SVG or PNG without an account or watermark.

Does this tool give me an official UPC or GTIN?

No. It makes a barcode image from data you provide. Official retail identifiers must be obtained from GS1 or the relevant issuing organization.

Can I use this as a mobile barcode generator?

Yes. The generator works in modern mobile browsers. On supported devices, the native share button is available after a barcode is generated.

How can I generate a barcode in C#?

Use a dedicated .NET barcode library such as ZXing.Net inside your application. ToolkitLoop does not provide a C# API.

Can I make a QR code with this barcode generator?

This page focuses on product, inventory and logistics barcodes. Use the dedicated QR Code Generator for QR codes.

Developers

Developer resources for C# and .NET

Building barcode generation into a C# or .NET application? Use a maintained library such as ZXing.Net. ToolkitLoop is a browser tool for quick generation and testing, not a C# API. ZXing.Net ↗