Online Barcode Generator > Generate Code 39
This is a free web-based online barcode generator, designed for users to easily generate Code 39 ("Code 3/9", "Code 3 of 9", "USS Code 39", "USD-3") 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 navigate to other 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:

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

Barcode Image Setting
SymbologyCode 39ex can encode a-z in addition
Code to EncodeValid: 0-9, A-Z, - $ % . /+ (& a-z for 39ex)
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

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

Code 39 Barcode SDK Library
Code 39 for .NET Code 39 for C# Code 39 for Excel Code 39 for Crystal Reports
Code 39 for ASP.NET Code 39 for VB.NET Code 39 for Word Code 39 for Reporting Services
Code 39 for .NET WinForms Code 39 for Java Code 39 Font Code 39 for RDLC Reports

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KeepAutomation Free Online Barcode Generator