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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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    Changing extensions of file upload field

    Asked by Devin  on July 14, 2015 at 01:59 PM

    Do you forms allow for file type upload restrictions? For example, to only allow upload of PDFs?

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    JotForm Support

    Answered by BJoanna on July 14, 2015 at 03:02 PM

    Yes, forms allow file type upload restrictions. Inside of Form Builder select File Upload field and click on Extension option. There you can set extensions of your File Upload field.

    More about upload field allowed file types you can find in this article:


    I have created demo form and I set pdf to be only allowed extension of file upload field.


    Hope this will help. Let us know if you need further assistance.