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.
Input mask on a text box field can be used to validate the values as per the format specified. For example if you want the phone number in the US format you may specify the input mask as below :
When this field is filled on the form, user is only allowed to type numbers. Alphabets and special characters are restricted.
Similarly, you may restrict the field to enter only alphabets by using @ and also a combination of alphabets and numbers by using both as shown below.
Hope this information helps.