Connect Formidable Forms. Send every lead to Kit (formerly ConvertKit).

Connect Formidable Forms to Kit (formerly ConvertKit)

Connect Formidable Forms to Kit, the email platform formerly known as ConvertKit, and every form submission becomes a subscriber in the Kit form you choose. The free ClickSyncr for Kit plugin adds a Kit form action, available in Formidable Lite as well as Pro: connect your v4 API key once, pick a Kit form, map your fields, save. So there is no code, and it takes about two minutes per form.

Before you begin

You need three things: the ClickSyncr for Kit plugin activated, Formidable Forms active, and a Kit account (free accounts work, including accounts from the ConvertKit era) with permission to create a v4 API key. You store the key once, and every supported builder on the site then shares it.

Get your Kit v4 API key

1. Log in to Kit and open your account settings, then go to the Developer (API Keys) section.
2. Create a v4 API key. Accounts from the ConvertKit era work the same way.
3. Copy it and paste it into any ClickSyncr Kit panel. One key serves the whole site, and free Kit accounts work.

Treat the key like a password. Anyone holding it can read and modify your Kit subscribers.

Formidable Forms setup, step by step

1. Open the form’s actions and add ClickSyncr Kit. From Formidable → Forms, edit a form and open Settings → Actions & Notifications. Add the ClickSyncr Kit action.
2. Paste your Kit v4 API key and connect. Also, you store the key once, and every other form and builder reuses it across every ClickSyncr Kit surface on the site, so other forms and builders reuse the same connection.
3. Choose the Kit form. In fact, the dropdown lists every form in your Kit account, so each WordPress form can feed a different Kit form.
4. Map your form fields. Then Email is the required mapping; first name and every custom field in your Kit account load automatically once the key connects.
5. Optional: set a consent field. Also, choose a checkbox, acceptance or radio field to drive opt-in. Ticked adds the subscriber to the Kit form you chose; unticked saves them in Kit as a subscriber only, without joining the form, so no form emails or automations fire.
6. Update the form. In addition, submissions now sync on every entry.

Email, first name, and custom fields

Kit identifies subscribers by email, so Email is the one required mapping. First name has its own field, and every custom field in your Kit account loads automatically once the key connects, ready to receive any other form input. Also, ClickSyncr simply skips an unmapped field and never overwrites existing subscriber data with a blank value. Because subscribers are matched by email, a repeat submission updates the existing subscriber instead of creating a duplicate.

Double opt-in, the Kit way

Kit handles confirmation at the form level: each Kit form carries its own incentive email and double opt-in settings inside Kit. ClickSyncr subscribes the visitor to the Kit form you chose, and your form’s own settings decide whether a confirmation email goes out first. That means your opt-in behaviour stays exactly where Kit users expect to manage it.

Verify the sync

First, submit the form on the front end (not the admin preview) with a test address you can recognise, filling every mapped field. Then, in Kit, open Subscribers and confirm the subscriber exists with the mapped values, and check the Kit form’s own reporting for the new entry. In short, that one minute catches almost every configuration mistake.

Troubleshooting

Does the action work in Formidable Lite?

Yes. The ClickSyncr Kit form action registers in the free Formidable Lite as well as Formidable Pro.

Can different Formidable forms use different Kit forms?

Yes. Each form’s action chooses its own Kit form and field map while sharing the site-wide key.

Other form builders

ClickSyncr for Kit also connects Contact Form 7 · WPForms · Gravity Forms · Ninja Forms · Fluent Forms · Forminator. Overview, features and pricing: Kit integration for WordPress. Browse all ClickSyncr integrations.

“Kit” and “ConvertKit” are trademarks of Kit, Inc. ClickSyncr for Kit is an independent integration and is not affiliated with, endorsed by, or sponsored by Kit, Inc.

Frequently asked questions

Why can a Kit subscriber exist without joining the selected form?

Kit subscriber creation and form membership are separate steps. If the first succeeds but the second fails, ClickSyncr records a message saying the subscriber was created but could not be added to the form. Check the recorded error and selected Kit form in your Formidable Forms configuration. Finding the subscriber in Kit alone does not prove that the form connection completed.

Is subscriber-only mode the same as leaving consent unchecked?

No. With no consent field selected, choosing subscriber-only mode lets ClickSyncr save the person in Kit without adding them to the Kit form. With a consent field selected on your Formidable Forms form, an unchecked answer blocks the send before it reaches Kit. Review both settings when testing; a deliberate subscriber-only configuration and a refused consent answer have different outcomes.

Why can a Kit custom field label differ from its saved mapping key?

The Kit field list contains a display label and a separate field key. ClickSyncr shows the label when Kit supplies one, but stores and sends the field key. When checking a Formidable Forms mapping against your Kit account, identify the field itself rather than relying only on similar labels. Reconnect or refresh the available fields after an account change, then verify the saved mapping with a test.