Skip to content

custom-css.mdx

Latest commit

 

History

History
100 lines (77 loc) · 8.14 KB

custom-css.mdx

File metadata and controls

100 lines (77 loc) · 8.14 KB
title Use Custom CSS in your form
description Customize any part of your form's appearance with custom CSS. This feature is shared across all forms with the same theme.
sidebarTitle Custom CSS
icon paint-roller

What is Custom CSS?

CSS is the language used to style HTML content. By writing CSS code for your form, you can define the colors, fonts, and other visual properties of your form elements.

Most parts of your form’s appearance can be modified without code using themes. But if you need a more custom look, you can use custom CSS to make a fully custom look & feel.

Custom CSS is available starting on the **Pro** plan. For more details on pricing, click [**here**](https://www.fillout.com/pricing).

How to add a custom CSS

Click Theme in the upper left side of your form and scroll down to Advanced designer in the left-hand panel. Then, Add CSS.

<img src="/images/Screenshot2025-12-01at4.10.15PM.png" alt="Screenshot 2025-12-01 at 4.10.15 PM.png" title="Screenshot 2025-12-01 at 4.10.15 PM.png" style={{ width:"49%" }} />

Once you click Apply CSS, you’ll see the CSS applied to your form. Go to Preview mode to confirm your form looks as you expect it to.

<img src="/images/advanced/image-16.png" style={{ width:"73%" }} />

CSS classes you can use

These classes make it easier to target elements in your form. In general, these are the class names you should rely on (as opposed to other internal class names which may be subject to change).

CSS Class Element Example
.fillout-field-container The container for all the fields on each page .fillout-field-container { // Add a thicker shadow box-shadow: 0px 4px 8px rgba(0, 0, 0, 0.1); // Decrease width of form max-width: 450px; }
.fillout-field-[field-type] Examples: .fillout-field-short-answer .fillout-field-dropdown Target specific field types // Change the width of short answer fields .fillout-field-short-answer input { max-width: 350px; }
.fillout-field-button “Next” button // Make the “next” button rounded .fillout-field-button button { border-radius: 100px }
.fillout-back-button Back button // Change the back button background color .fillout-back-button { background: blue; }
.fillout-skip-button Skip button .fillout-skip-button button { background: black; border-radius: 10px; color: white; }
.fillout-field-label Field labels // Change question labels to green .fillout-field-label p { color: green; }
.fillout-caption All field captions // Change captions to red .fillout-caption p { color: red; }
.fillout-field-text (Heading) or .fillout-field-paragraph (paragraph) Heading and paragraph fields // Make h1 size text in paragraph field have different font .fillout-field-paragraph h1 { font-family: 'Brush Script MT', cursive; }
input[type="text"]::placeholder Placeholder text // Change placeholder color input[type="text"]::placeholder { color: gray; }
.fillout-edit-mode .fillout-live-mode Target edit or live (preview + published) mode of your forms // Hides all field labels in live mode of the form .fillout-live-mode .fillout-field-label p { display: none; }
.fillout-required-asterisk Required asterisk * // Only changes in preview/live mode, not in the editor .fillout-required-asterisk { color: black; }
.fillout-login-profile The profile icon in the top right corner that lets users logout of “login” forms. .fillout-login-profile { display: none; }
.fillout-theme-logo Your logo, added via theme .fillout-theme-logo { display: none; }
.fillout-error-validation-message Validation error message .fillout-error-validation-message { color: black; }
**Can’t find the class you need?** Let us know at [support@fillout.com](mailto:support@fillout.com) and we’ll add it!

Adding multiple fonts with Custom CSS

You can also use custom CSS to have different text in your form use different fonts. For example:

/* Target Heading and Paragraph Fields */
.fillout-field-text h1, h2,
.fillout-field-paragraph h1, h2 {
  font-family: 'MyCustomFont', Inter, 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

Here, we’ve targeted specifically the H1 and H2 headings in our form with our custom font, while the rest of the text will follow the font chosen on the theme of the form.

To import the fonts into the form, you’ll need to use the custom code feature to insert the font-family snippets, e.g.:

<style>
	/* Add one or more custom font-faces */
	@font-face {
	    font-family: 'MyCustomFont';
	    src: url('<Insert URL to custom font file>'),
	}
</style>

Custom code guide

If you want to add custom code to your form, like a JavaScript snippet or HTML div, there are two options:

Display testimonials, banners, or any static object. Add custom code to inject analytics tracking scripts.