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 FileMaker Pro Custom Functions

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StringToCode39 ( text )

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  Average rating: 4.4  (32 votes)
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Gary Czychi, GC Consulting

Generates a code39 string with checksum

Sample Input:
StringToCode39 ( "GCC-n01" )
Sample Output:

 Then copy & paste into FileMaker Advanced's Edit Custom Function window.

Click here to copy To Clip Manager if you have myFMbutler's Clip Manager installed


The output of this function generates a valid code39 barcode string with checksum and start and stop characters. If a barcode font is installed the correct barcode is generated.

Converts a string of up to 7 characters into a valid code39 string with the checksum character, resulting in 8 characters plus start and stop characters.

Non-valid code39 characters are omitted (but only, when number of allowed characters + number of unallowed characters ≤ 7)

You can input lower case characters, they are converted into valid upper case characters.

Author: Gary Czychi
Date: 08/14/2013

P.S.: There is probably a much more elegant solution and I would like to hear from you when you have it.

Note: these functions are not guaranteed or supported by Please contact the individual developer with any questions or problems.

This is my Custom Function and I want to edit it


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