# Form Prefilling

Learn how to pre-fill forms with user data for better conversion rates.

Forms can be attached to cards from the portal to allow end-users to enter information and enter competitions. Surveys are stand-alone forms that can be used to collect feedback from end-users.

## Pre-filling from URL query parameters

Form fields on cards and surveys can be pre-populated with information based on the query string parameters in a given URL. A given form field will be populated if the form field's unique key matches the key specified in the URL's query parameters.

**Format:**

```
https://{url}/?komo_f:{unique key of form field}={pre-populated value}
```

**Example:**

URL with pre-filled value: `https://myhub.komo.site/?komo_f:first_name=John`

URL with multiple pre-filled values: `https://myhub.komo.site/?komo_f:first_name=John&komo_f:last_name=Doe`

The above URL will store the key `first_name` and `last_name` with their associated values in the browsers session storage and when a form is displayed, forms containing fields with the unique key `first_name` will be prepopulated with the value of "John" and forms containing a field with the unique key `last_name` will be pre-populated with the value of "Doe".

The associated keys and values used to pre-populate a form will be cleared when the page session ends.