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.
Please try adding a LightBox embedding code to your Squarespace website homepage to see if it works as expected.
1) Get a form LightBox code with enabled 'Open on Page Load' option.
2) Add the LightBox code by using a Squarespace Code Block to your website homepage.
If you need any further assistance on this, please let us know.
On behalf of my colleague, you are welcome.
I have moved your question to a new thread and you will be answered here: https://www.jotform.com/answers/878138