Online Barcode Generator > Generate UPC-A
This is a free web-based online barcode generator, designed for users to easily generate UPC-A, UPC-A+2, UPC-A+5 linear barcodes in Jpeg, Gif and Png image formats. Various parameter settings are available such as barcode size, rotation, resolution, image formats, text font etc. For more settings or barcode integrations, please refer to KeepAutomation barcode solutions, including:


We are providing free online barcode generation service through url. You can generate barcode image in your web server through the following url:

To get this free online service, please contact us

Watch a quick video: how to get a free keycode and apply it?

Barcode Image Setting
Code to EncodeValid Input: 11 numeric digits
Supplement CodeInput a 2-digit or 5-digit numeric data
Supplement HeightRatio between supplement bar height & primary bar height
Supplement SpaceSpace between supplement barcode and primary barcode
Unit of MeasurePixel, Cm and Inch to select
X (Bar Width)Minimum is 1 pixel
Y (Bar Height)
Orientation0, 90, 180, 270 degrees to select
Image FormatPng, Gif and Jpeg available
Left MarginA 10x margin is pre-added as specified
Right MarginA 10x margin is pre-added as specified
Show TextSet true to display data text under image
Text Font SizeFont size of the human readable text
Unlock Keycode

Checksum digit is automatically calculated and added!

Right click the barcode and select "save as" to save the image to your computer.

UPC-A Barcode SDK Library
UPC-A for .NET UPC-A for C# UPC-A for Excel UPC-A for Crystal Reports
UPC-A for ASP.NET UPC-A for VB.NET UPC-A for Word UPC-A for Reporting Services
UPC-A for .NET WinForms UPC-A for Java UPC-A Font UPC-A for RDLC Reports

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KeepAutomation Free Online Barcode Generator