Hidden Fields
Hidden fields capture data invisibly and optionally sync it to Klaviyo profiles. They are not shown to the user but are included in the form submission data.Source Types
Presets
Common Klaviyo profile fields are available as one-click presets:- First Name, Last Name, Email, Phone Number, City, Country, Region
Configuration Options
Using Hidden Fields in the Form
Hidden field values can be used as merge tags inside the form itself. Use{{hidden:key}} in field labels, welcome headlines, or intro text to personalize the form with the captured value.
For example, if you have a hidden field with key first_name sourced from Klaviyo, you can write a welcome headline like:
Hi {{hidden:first_name}}, we have a few questions for you!
The placeholder is replaced at runtime with the actual value. If the value is empty, the fallback is used (or the placeholder is removed).
Variables
Variables are numeric values that can be used for scoring and calculations across form pages. They work together with the Logic Builder to create scored quizzes and assessments.
Variables are manipulated by the Logic Builder’s Scoring and Branching tabs — answer options can add, subtract, or set variable values. The final variable value can determine which end screen is shown.