JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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.
I've just tried uploading some files with more than 1MB and 14MB and see that the files are being uploaded without any issues.
It seems that the setting on the Upload field was not saved correctly. If the issue still persists, we request you to check the form in a new private/incognito window and let us know.
We would be happy to take a look again for you. Thanks!