Questions about JotForm functionalities: Is it possible for the field to be prepopulated?

Hello I'm considering using jotform but I have a few questions first.

1. Can I create a form where people can upload photos on the free tier?

2. I want to send users from my website to a jotform I create for them. I have authentication built into the site, so I already have access to the users email. I'm wondering if it's possible to hook into your api, and send along the user email when they click on the link to go to the form, and an email field on the form is pre-populated? 

Thanks for any help with these questions.

Jack

1. Can I create a form where people can upload photos on the free tier?

Yes, you can have your users upload photos using the File Upload field under the Free plan. Here's a guide: How-to-Create-File-Upload-Forms.

Please take note that under the Free plan, there is a limit of 100MB upload space. You need to delete the submissions with attachments/uploads to clear your storage space.

2. I'm wondering if it's possible to hook into your API, and send along the user email when they click on the link to go to the form, and an email field on the form is pre-populated? 

We have an API Documentation, please check this link: https://api.jotform.com/docs/.

If you are planning to prepopulate the fields, then it is possible through the URL parameters. Here's a guide: Prepopulating-Fields-to-Your-JotForm-via-URL-Parameters.

You may also use the Spreadsheet to Form widget. This widget allows you to upload your spreadsheet to your form and use the values you have in the spreadsheet to pre-populate your form. Here's a guide: How-to-Use-the-Spreadsheet-to-Form-Widget.

Hope that helps. Thank you.