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.
You could add the File Upload field to your form in order to allow the submitter to upload the file, you will find it under the Basic Fields section while in the Form Builder:
You could also change the file allowed types by following this guide: https://www.jotform.com/help/29-How-to-Change-the-Allowed-File-Types-Extensions-in-the-Upload-Field
And this one will help you to change the default max upload size: https://www.jotform.com/help/33-Changing-the-upload-size-limit
If you have any question, please let us know.