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.

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    How can I require people to enter 10 digits in the phone number field?

    Asked by piglit on January 21, 2016 at 10:14 AM
    phone number 10 digits digits in
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    JotForm Support

    Answered by Charlie on January 21, 2016 at 11:40 AM

    That should be possible by enabling the "Input Mask" and checking the "Fill Mask Validation" check box.

    You can declare there how many digits needed to be filled out. 

    Here's a test form: https://form.jotform.com/60204406354950 

    Let us know if that works.