---
title: Add hidden fields to your Fillout form
description: "Fillout is a form builder that allows you to capture leads on your website. With Leadsources, you can **track the source of the leads generated in Fillout**, alongside 6 other lead source data. In this guide, we will show you…"
url: "https://help.leadsources.io/docs/add-hidden-fields-fillout-form/"
updated: "2026-10-27"
category: Add Hidden fields
---

# Add hidden fields to your Fillout form

Fillout is a form builder that allows you to capture leads on your website.

With Leadsources, you can **track the source of the leads generated in Fillout**, alongside 6 other lead source data.

In this guide, we will show you **how to add hidden fields in Fillout**to start capturing the source of your leads.

[Add hidden fields to your Fillout form](https://www.youtube.com/embed/smKipRSHIT0?feature=oembed)

## Step 1: Open the form

**Log in**to your Fillout account.

**Click**on the form you want to edit.

![](http://help.leadsources.io/wp-content/uploads/2024/08/Add-hidden-fields-on-Fillout-1-1024x461.webp)

The form builder opens. At the bottom, **select the first slide of your form**. The left panel opens.

![](http://help.leadsources.io/wp-content/uploads/2024/08/Add-hidden-fields-on-Fillout-0-1024x461.webp)

## Step 2: Add the hidden fields

**Context:** In this step, we set up the hidden fields one by one to store the lead source data captured by Leadsources.

To add a hidden field, click the "**Short answer**" hidden field.

![](http://help.leadsources.io/wp-content/uploads/2024/08/Add-hidden-fields-on-Fillout-2-1024x461.webp)

Change its name directly from the form to "**Channel**".

Then, **click the gear icon**on the right of the "Short answer" field. The "Short answer" panel opens on the right.

![](http://help.leadsources.io/wp-content/uploads/2024/08/Add-hidden-fields-on-Fillout-3-1024x461.webp)

Under "**Default value**" --> Write **[channel]**

Scroll down and click the "**Logic**" block to expand it.

Select "**Hide always**" to make this field hidden.

You have now **created the first hidden field**.

![](http://help.leadsources.io/wp-content/uploads/2024/08/Add-hidden-fields-on-Fillout-4-1024x461.webp)

![](http://help.leadsources.io/wp-content/uploads/2024/08/Add-hidden-fields-on-Fillout-5-1024x461.webp)

**Create the rest of the hidden fields** by following the same process and writing the following information (the "Channel" field was included for visibility, don't add it twice):

| **Label** | **Default Value** **text** |
| --- | --- |
| Channel | [channel] |
| Source | [source] |
| Campaign | [campaign] |
| Term | [term] |
| Content | [content] |
| Landing page | [landingpage] |
| Landing page subfolder | [landingpagesubfolder] |

You are all set!

Leadsources will **capture****and store the leads data****in these 7 hidden fields**. This data will be visible from the Fillout form submissions page, alongside the form's responses (name, email, etc.).