What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.

At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.

We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.


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    Is it possibe with Jot Form to create a validation field, such as the one that is used when entering a username when creating an account?

    Asked by Brandon09 on November 08, 2010 at 03:17 PM

    I want to use a set of UPC Numbers instead and if it can be done, how can I create this field?

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    JotForm Founder

    Answered by aytekin on November 09, 2010 at 06:13 AM

    You can add validation to check if the entered value it a numeric value or if a required field is entered. But you cannot check it against existing entries as you suggest.