Alright, what’s the deal with Infusionsoft hidden fields? (Please read that while doing a Jerry Seinfeld impression.)

Hidden fields are available as an option when you’re building old-school landing pages or web forms in Infusionsoft.

Note: This post was written when Keap was called Infusionsoft, and is focused on using hidden fields in the campaign builder – which is available in the Pro, Max, and Max Classic versions of Keap.

Here’s what I’m talking about in the legacy form builder:

See hidden fields in action (GIF)

You can also use hidden fields with Keap’s newer landing page builder – it’s just a little different there. On the new builder, you add the form and fields, then toggle “hidden” on or off for each field you want to hide.

Keap help article: Using hidden fields on new landing pages

Here’s a real-world example of how you can use a hidden field on a web form (or landing page) to capture new information or clean up your list:

Watch: Hidden fields use case (YouTube)

Why use hidden fields?

Hidden fields are one of those “small but mighty” features. They let you quietly pass information from a form into Keap without asking the visitor to type it in.

Some common uses:

• Passing UTM parameters from your ads into contact records.
• Capturing the “source” or “campaign” for a specific opt-in page.
• Automatically tagging contacts based on the form they submitted.
• Storing things like referrer, affiliate ID, or internal tracking values.

Done well, hidden fields give you better reporting, better segmentation, and less friction on your forms – because you’re not asking the visitor to provide details you can infer or capture automatically.

Key tips

• Be intentional about which fields you hide and what you store there.
• Map each hidden field to an appropriate contact field (or custom field) in Keap.
• Test your form thoroughly so you can confirm the data is being captured exactly as expected.

If you’re already using forms in Keap, hidden fields are an easy way to level up your tracking and automation without adding extra friction for your visitors.