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Overview

When embedding a subform within a main form, you can pass field answers or values (e.g., name, email, and order ID) from the main form to the subform using URL parameters. This removes the need for users to re-enter information. For example, you can:
  • Pass a user’s name or email for additional details in a subform
  • Transfer order or project IDs for tracking submissions
  • Pre-fill contact info in follow-up or feedback subforms

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How to send data

1

Add a URL parameter in your subform

Open your subform and follow the steps above. In our example, we have the order form as the main form and a subform for selecting products.
2

Connect the parameter to your main form

Click the subform field’s . Scroll down to Advanced and Configure the information you’d like to pass to your subform.Screenshot 2025-11-10 at 5.30.14 PM.pngTo add a new subform field, check out this short guide.Click + Add new and select the URL parameter from your subform in the left. Then, map this to corresponding field in your main form.Screenshot 2025-11-10 at 5.47.58 PM.png
3

Publish and share

That’s it! The field where you set the URL parameter as the default value will now be pre-filled automatically.Preview your form first to ensure it’s working as you intended it to. Then, click Publish and share or embed your form.

URL parameters

Pass information to a form to support pre-filling.

Subforms

Collect repeated data with compact nested forms.