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.
Getting an invalid extension errorAsked by champlainedu on February 18, 2016 at 01:53 PM
I've tried multiple extension listings for the upload file buttons, including capitalized and not capitalized, with a dot before the extension and without, still getting the following error for all buttons:
"Levin0943751.jpg has invalid extension. Only are allowed."
Getting JotForm style size height
JotForm Support Manager
I was able to upload PNG and JPG files with no problem in your form. I did it opening the direct link of it http://www.jotform.us/form/60076404142142
Here is the proof of my testing:
Is this problem happening in the embed version? The URL that you shared above does not show a form. If this is the case, please embed the form using the iFrame method. because the problem might be caused by a conflict between the scripts codes in your page and the jotform.