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.
To use the App: http://apps.jotform.com/app/field_prepopulator.
Go to URL: http://prepopulate.jotform.io/
1. Select a Form you would like to generate a prepopulated URL for.
2. Fill in the neccesary fields.
3. Generate a url by clicking the Generate URL button.
Kindly view this Screencast Example for help on usage.
Do note my colleagues has also anwered your question on thread -How-to-make-the-matrix-form-prefilled#4. Kindly try to avoid multiple threads for the same issue so that we may assist you better.