SCSS Compiler
FormattersCompile SCSS to expanded CSS instantly with the official Dart Sass engine. Supports variables, mixins, @use, @forward, nesting, and functions. Browser-based.
About SCSS Compiler
The SCSS Compiler is a browser-based tool that compiles SCSS stylesheets to CSS using the official Dart Sass engine (`compileString` with `style: 'expanded'`) — dynamically imported on first use so no upfront bundle cost is incurred. It supports the full Dart Sass feature set: variables (`$`), mixins (`@mixin` / `@include`), the modern module system (`@use`, `@forward`), nesting with `&` parent references, functions (`@function`), control flow (`@each`, `@for`, `@while`, `@if`), placeholder selectors (`%`), and `@use 'sass:color'` / `sass:math` built-in modules. The SizeStats footer shows input vs compiled output size. All compilation runs in the browser; your stylesheets never leave your device.
Features
- ✓Powered by the official Dart Sass engine (`compileString`) — the reference SCSS implementation
- ✓Compiles to expanded CSS output — readable, properly indented
- ✓Full support for $variables, @mixin/@include, @extend, and placeholder selectors
- ✓Modern module system: @use, @forward, and sass:color / sass:math built-in modules
- ✓Handles nesting, & parent references, and BEM-style selectors
- ✓@each, @for, @while control flow and @if/@else conditionals
- ✓Functions (@function / @return) and interpolation (#{$var})
- ✓Clear, actionable compile error messages (file, line, column)
- ✓Syntax-highlighted editor for SCSS input and CSS output
- ✓One-click clipboard copy of compiled CSS output
- ✓Real-time byte-savings stats (SCSS input vs CSS output size)
- ✓Mobile-responsive layout with a dedicated Compile button
- ✓100% client-side — your stylesheets never leave the browser
Common Use Cases
- Compiling SCSS components to CSS for direct use in HTML prototypes
- Testing SCSS mixins, functions, and @use module imports quickly without a build step
- Debugging SCSS compilation errors before integrating into a webpack or Vite pipeline
- Generating CSS from design-token-based SCSS variable files for documentation
- Learning Dart Sass features like @use and @forward by experimenting in the browser
- Converting SCSS theme files to CSS for embedding in email templates
Frequently Asked Questions
QWhich Sass dialect does this compile?
SCSS (Sassy CSS) — the superset-of-CSS syntax. The tool uses Dart Sass `compileString` and does not support the legacy indented .sass syntax.
QDoes it support @use and @forward from the Dart Sass module system?
Yes — @use and @forward are fully supported, including built-in Sass modules such as @use 'sass:color', @use 'sass:math', and @use 'sass:list'.
QIs the output minified?
No — the compiler uses style: 'expanded' to produce human-readable CSS. To minify, paste the output into the CSS Minifier tool.
QIs my SCSS sent to a server?
No. The Dart Sass engine is dynamically imported and runs entirely inside your browser. Nothing is transmitted to any server.