Using JotForm to Process Submissions

I have a number of forms I have designed using Webflow and other apps. Can I keep my forms intact and use JotForm to process the submissions?

Yes, you can do that. You can take your form source code and add the scripts and CSS files in your existing form. After that, update the field names and action URL of your existing form with the ones from your JotForm source code.

Or, if you're familiar with API, you can use JotForm API to create submissions out of your existing forms data when its submitted. https://api.jotform.com/docs/

That should work. Can you identify the parts of Jotform code I need to paste into my existing form? 

You must include the followings;

The JS, CSS codes.

And then for the form code, you must copy all the open form tag. Then for the fields, just update your existing field names with the ones exactly from your JotForm code. Example:

That's pretty much it.