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.
Matters about PDF with JotForm are quite broad and cover different areas of the builder or on usage of forms.
If you are referring to the enabling of the attachment of the submission on PDF format, you can modify this on the submissions page. You can check this guide for more information: https://www.jotform.com/help/384-How-to-Customize-PDF-Submissions-Report
If what you mean is you have a local PDF file and have uploaded to attach to the email alert on Autoresponder emails, you will have to replace it by removing the existing one and uploading a new one.
If you are referring to the conversion of forms to fillable PDF, yes you can simply modify your form and download a new one. The newest downloaded PDF version of the form should reflect the updates you've made on the form builder.
Please let us know if you have questions or you need clarification.