Squarespace offers beautiful, pre-designed templates, but sometimes you want a more personalized touch. That’s where custom CSS comes in! Whether you want to adjust font sizes, change button colors, or modify layouts, CSS lets you style your website beyond the built-in options.

If you’ve never worked with CSS before, don’t worry! This step-by-step guide will walk you through how to safely add custom CSS to your Squarespace website—even if you're a beginner.

What is CSS, and Why Use It in Squarespace?

CSS (Cascading Style Sheets) is the code that controls how a website looks. While Squarespace gives you a lot of design control, CSS allows you to make advanced customizations that aren’t possible through built-in settings.

What Can You Customize with CSS?

✅ Fonts & typography styles
✅ Colors, spacing, and layouts
✅ Buttons and hover effects
✅ Image borders and opacity
✅ Navigation menus and footers

How to Safely Add Custom CSS in Squarespace

Before making any CSS changes, it’s a good idea to back up your current design settings and keep your edits organized.

Step 1: Open the Custom CSS Editor

Log in to your Squarespace website.
Navigate to Website > Design > Custom CSS.
You’ll see a blank text box where you can add your custom CSS code.

Step 2: Add Basic CSS to Customize Your Site

Here’s a simple example:

✅ Change Button Color:

.sqs-block-button-element--primary { background-color: #ff6600; /* Change button color */ color: white; /* Change text color */

✅ Change Heading Font Size:

h1 { font-size: 42px; /* Make main headings larger */ }

✅ Remove Page Titles from Certain Pages:

.page-title { display: none; }

Step 3: Find the Right CSS Selectors with Squarespace ID Finder

Install the Squarespace ID Finder Chrome extension.
Open your Squarespace site in Chrome.
Click on the extension, and it will highlight the CSS classes and IDs for each section of your site.
Copy the selector and use it in your Custom CSS panel to style it.

This tool makes finding the right selectors much easier, saving you time and effort when customizing your site!

Step 4: Use Squarespace’s Built-in CSS Variables

Instead of manually setting colors or fonts, you can use Squarespace’s built-in CSS variables for a more consistent look.

✅ Example: Change all buttons to match your site's primary color

.sqs-block-button-element--primary {background-color: var(--primary-button-bg-color);}

Best Practices for Adding Custom CSS in Squarespace

To keep your website fast and functional, follow these best practices:

✅ Keep Your CSS Organized

Add comments in your CSS file to remember what each section does.
- /* Custom styles for navigation menu */ .nav-wrapper { background-color: black; }

✅ Test Your Changes on Mobile

Squarespace is mobile-responsive, but some CSS changes may not look right on phones or tablets. Use:

@media screen and (max-width: 768px) { h1 { font-size: 28px; } }

✅ Avoid Overloading Your Site with CSS

Too much custom code can slow down your website. Keep your CSS clean and minimal by only adding necessary styles.

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How to Add Custom CSS to Your Squarespace Website (Beginner’s Guide)

Want to customize your Squarespace website but don’t know how to code? This beginner-friendly guide will show you how to add custom CSS in Squarespace to tweak fonts, colors, layouts, and more. Learn step-by-step instructions, best practices, and tips to avoid common mistakes while keeping your site optimized for performance.