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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.

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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    Form error: File extension is not allowed

    Asked by JoMarVisions on June 12, 2014 at 04:15 PM

    Gives an error saying JPG is not valid when it is and pdf file not showing on the form for the artists to read.

    Page URL:

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    JotForm Support

    Answered by Mike_T on June 12, 2014 at 04:55 PM

    Thank you for contacting us.

    In order to fix this, please adjust allowed Extensions on your upload fields.

    Change them from:

     jpg, jpeg, png,


    jpg, jpeg, png

    You might also want to increase a Max File Size from default 1MB to some other value.

    Please feel free to contact us if you need any further assistance. We will be happy to help.

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    Answered by JoMarVisions on June 12, 2014 at 06:30 PM
    ok the files are being uploaded now. What about the pdf, why isn't it showing in the form?
    Thanks for all your help
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    JotForm Support

    Answered by EltonCris on June 12, 2014 at 09:35 PM

    Hi Jo,

    Sorry but what do you mean exactly with PDF not showing on your form? Do you mean your file upload field isn't recognizing PDF file extensions?

    Did you add the pdf file extension on the Extensions box as well?

    Also, please take note that if you allow pdf files, you must also turn off "Validate Image". Validate Image ensures that all files uploaded to your form is in image file extensions so it is obvious that PDF is not an image file type that's why it will be rejected once you upload it to your form.


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    Answered by JoMarVisions on June 13, 2014 at 03:05 PM

    The form has a pdf for the artists to r

    ead and check the box that they read. It's not showing in the website when it loads.