This knowledge base article relates to the WS Form Klaviyo add-on. Click here to purchase this add-on.

The Klaviyo add-on lets you use WS Form to create forms that subscribe profiles in Klaviyo. You can create forms for Klaviyo lists in a single click!

The Klaviyo add-on requires WS Form PRO.


The WS Form PRO Klaviyo add-on plugin is installed in the same way as installing the WS Form PRO plugin.

Once installed you will need to activate the license for the plugin. When you purchase the WS Form Klaviyo add-on plugin, you will be given a license key. If you have lost your license key(s), click here.

To activate your license key:

  1. Click ‘WS Form’ in the WordPress administration menu.
  2. Click ‘Settings’.
  3. Click the ‘Klaviyo’ tab at the top of the page.
  4. Enter your license key.
  5. Click the ‘Activate’ button.

If your license key fails to activate, please ensure you are using the correct license key and not your WS Form PRO license key.

Creating a Form for Klaviyo


WS Form can create a form for any of your Klaviyo lists in a single click. This process not only creates a form but also fully configures WS Form so that the form is ready to use immediately.

To create a Klaviyo form in WS Form:

  1. Click ‘WS Form’ in the WordPress administration menu.
  2. Click ‘Add New’.
  3. Select the ‘Klaviyo’ tab at the top of the page.
  4. Click on any of your Klaviyo lists to create a form.
  5. Wait a few moments while the form is created.

That’s it! Your form will be created and is ready to add to your website.

If your list does not appear, click the refresh icon in the ‘Klaviyo’ tab.


It is also possible to use any form created in WS Form and add an action so that it is submitted to Klaviyo when a user saves or submits their form.

To add a Klaviyo action:

  1. When editing your form, click the ‘Actions’ icon at the top of the page. The ‘Actions’ sidebar will open on the right-hand side of the page.
  2. Click the ‘Add’  icon to add a new action.
  3. Select ‘Add to a Klaviyo List’ from the Action pulldown. A series of settings will appear.

As with all sidebars in WS Form, click the ‘Save’ button at the bottom to save your changes, or click ‘Cancel’ to disregard your changes.

The Klaviyo action settings are as follows:

When Should This Action Run?

You can choose to run the Klaviyo action when the form is saved, submitted, or both.

Klaviyo List

Choose the Klaviyo list you would like profiles to be added to. If you have created a new list since viewing this screen, you can click the refresh icon to retrieve the new list.


Enter the source you would like to be added to each profile that is added to your Klaviyo list.

Field Mapping

Field mapping tells WS Form which of your form fields relate to the corresponding fields in Klaviyo. For example you would want to map your Email field to the Email field in Klaviyo.

To map a field:

  1. Click the ‘Add’  icon at the bottom right of the field mapping section.
  2. In the left-hand column, select your form field.
  3. In the right-hand column, select the corresponding Klaviyo field.
  4. Repeat this process for each field on your form.
  5. Click the ‘Save’ button at the bottom of the sidebar to save your changes.
Opt-In Field

Use this setting to select which of your fields to act as the opt-in field. We recommend adding a checkbox field with a single checkbox. It is always recommended that you have an unchecked, opt-in checkbox on your forms to ensure you comply with GDPR requirements.

Populate Forms Using Klaviyo

As well as pushing form data with this add-on, you can also retrieve profile data and populate the fields on your form.

This feature is only available if a website visitor is signed in and their WordPress email address matches the email address of a profile in Klaviyo.

To enable this feature:

  1. Click the form settings icon in the top toolbar when editing a form.
  2. Click the ‘Auto Populate’ tab in the sidebar on the right.
  3. Enable the ‘Populate Using Action’ setting.
  4. Choose ‘Klaviyo’ from the ‘Action To Populate From’ pull down.
  5. Select the list you wish to populate data from in the ‘List To Populate From’ pull-down menu.
  6. Map the Klaviyo fields to your form fields.
  7. Click ‘Save’ at the bottom.

Note that if you created your form using a Klaviyo template the field mappings will automatically be created for you.