Code 39 Barcode Generator Free Online ¨C generate, print Code 39 barcode images using free online web app

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:

NOTE

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

https://www.keepautomation.com/linear.aspx?TYPE=4&DATA=123456789

To get this free online service, please contact us support@keepautomation.com

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

Barcode Image Setting
Parameter	Value	Note
Symbology		Code 39ex can encode a-z in addition
Code to Encode		Valid: 0-9, A-Z, - $ % . /+ (& a-z for 39ex)
Unit of Measure		Pixel, Cm and Inch to select
X (Bar Width)		Minimum is 1 pixel
Y (Bar Height)
Orientation		0, 90, 180, 270 degrees to select
DPI
Image Format		Png, Gif and Jpeg available
Left Margin		A 10x margin is pre-added as specified
Right Margin		A 10x margin is pre-added as specified
Show Text		Set true to display data text under image
Text Font Size		Font 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

Code 39 Introduction

Code 39, also named as 3 of 9 Code, USD-3, Alpha39, Code 3/9, Type 39 & USS Code39, is a self-checking linear barcode symbology which encodes alphanumeric data, including alphanumeric data: 0-9, A-Z; special characters: space $ % + - . / and start/sop character: *.

There are several standards based on Code 3 of 9 specification. For example:

HIBC Bar Code (Health Industry Barcode)
LOGMARS (Logistics Applications of Automated Marking and Reading Symbols)

Code 39 Character Set Encoding in web app

Code 39 standard mode

Code 39 barcode standard mode supports 43 characters, including

Numeric digit: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
Uppercase letters (A - Z)
Special characters: - (Dash), $ (Dollar), % (Percentage), (Space), . (Point), / (Slash), + (Plus)
Start/Stop characters

To encode the above chars into Code 39 with standard mode online web app, you need select property "Symbology" as "Code 39".

Code 39 full ASCII mode

Code 39 supports encoding the full 128 character ASCII character set. To encode the full ASCII chars into Code 39 in online web app, you need select property "Symbology" as "Code 39Ex".

Using online Code 39 generator web app, you do not need any font, VBA, Macro, formula programming to generate Code 39 barcode in browser.

Code 39 symbol check digit

The check sum digit for Code 39 is optional. For applications requiring enhanced data security, the modulo 43 (MOD43) check character may be used as a check digit.

To enable Code 39 check digit in web app, you need apply the option "Enable check digit".

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KeepAutomation Free Online Barcode Generator