How to use Sass

Last updated April 23, 2026

Next.js has built-in support for integrating with Sass after the package is installed using both the .scss and .sass extensions. You can use component-level Sass via CSS Modules and the .module.scssor .module.sass extension.

First, install sass:

pnpm

npm

yarn

bun

Terminal

pnpm add -D sass

Good to know:

Sass supports two different syntaxes, each with their own extension. The .scss extension requires you use the SCSS syntax, while the .sass extension requires you use the Indented Syntax ("Sass").

If you're not sure which to choose, start with the .scss extension which is a superset of CSS, and doesn't require you learn the Indented Syntax ("Sass").

Customizing Sass Options

If you want to configure your Sass options, use sassOptions in next.config.

next.config.ts

JavaScriptTypeScript

import type { NextConfig } from 'next'
 
const nextConfig: NextConfig = {
  sassOptions: {
    additionalData: `$var: red;`,
  },
}
 
export default nextConfig

Implementation

You can use the implementation property to specify the Sass implementation to use. By default, Next.js uses the sass package.

next.config.ts

JavaScriptTypeScript

import type { NextConfig } from 'next'
 
const nextConfig: NextConfig = {
  sassOptions: {
    implementation: 'sass-embedded',
  },
}
 
export default nextConfig

Sass Variables

Next.js supports Sass variables exported from CSS Module files.

For example, using the exported primaryColor Sass variable:

app/variables.module.scss

$primary-color: #64ff00;
 
:export {
  primaryColor: $primary-color;
}

app/page.js

// maps to root `/` URL
 
import variables from './variables.module.scss'
 
export default function Page() {
  return <h1 style={{ color: variables.primaryColor }}>Hello, Next.js!</h1>
}

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