Convert SCSS to CSS Online
Compile SCSS/Sass to plain CSS in your browser. No npm, no Node.js, no installation.
.card {
background: #c4552d;
border-radius: 8px;
padding: 1rem;
}
.card:hover {
opacity: 0.9;
}
.card .title {
font-size: 1.2rem;
color: white;
}SCSS to CSS Compiler
Why use this SCSS compiler?
Zero configuration
No npm install, no webpack, no Vite. Paste your SCSS and get CSS in seconds.
Official Dart Sass
Uses the official Dart Sass compiler (WebAssembly). Full compatibility with the modern standard.
Full privacy
Everything runs in your browser. Your code is never sent to any server.
Mixins, variables, nesting
Full support: $variables, &:selectors, @mixin/@include, @extend, and loops.
How it works
Three steps, no hassle
Write or paste your SCSS
Paste your SCSS or Sass code into the editor. Variables, nesting, mixins, functions, and parent selectors (&) are all supported.
Instant compilation
The plain CSS output appears automatically in the right panel. The compiler runs locally in your browser.
Copy or download the CSS
Copy the generated CSS to the clipboard or download it as a .css file ready for production.
FAQ
Got questions?
Sass has two syntaxes. The original syntax (.sass extension, created in 2006) uses indentation instead of curly braces and semicolons — it is more compact but breaks compatibility with standard CSS. SCSS (Sassy CSS, .scss extension) was introduced in Sass 3.0 in 2010 with a syntax fully compatible with CSS: any valid CSS is valid SCSS. SCSS quickly became the de facto standard and is what most developers use today. This tool supports both syntaxes.
SCSS variables are defined with the $ prefix and can store colors, sizes, fonts, or any CSS value. For example: $primary-color: #3498db; $base-font: 'Inter', sans-serif; $spacing: 16px. They are used directly in properties: color: $primary-color. Unlike CSS custom properties (--variable), SCSS variables are resolved at compile time and do not exist in the output CSS. For runtime dynamic access (with JavaScript), CSS custom properties are the appropriate tool.
The SCSS community has an unwritten rule: no more than 3–4 levels of nesting. Deep nesting generates highly specific CSS selectors (.component .block .element .modifier) that are hard to override and unnecessarily increase specificity. The BEM (Block-Element-Modifier) methodology pairs well with SCSS because it limits nesting to 1–2 levels while keeping structure clear. The parent selector & is useful for pseudo-classes (&:hover, &:focus) and modifiers (& .active) without semantically increasing depth.
Yes. Mixins are one of the cornerstones of SCSS: defined with @mixin name($params) and invoked with @include name(values). They allow reusing CSS blocks with variations — something standard CSS only partially achieved with custom properties. The tool also supports @extend (selector inheritance), @function (custom functions), @each, @for, and @while (loops), and @if/@else (conditionals).
There are cases where setting up a Node.js environment is impractical: quickly exploring SCSS without creating a project, working on a machine where you lack permissions to install packages, giving a live demo, reviewing the CSS output of a specific snippet, or simply learning the syntax. This tool uses the official Dart Sass compiler (the current reference implementation since LibSass was deprecated in October 2020) compiled to WebAssembly, ensuring full compatibility with the modern SCSS standard.
LibSass was the C/C++ implementation of Sass used by the npm package node-sass, which was for years the most popular way to compile SCSS in Node.js projects. The Sass team deprecated LibSass in October 2020 because it could not keep pace with new specifications. Dart Sass — the official implementation written in Dart and published as pure JavaScript for npm as the sass package — has been the reference implementation since then. If you have projects using node-sass, migrating to the sass package is recommended; it is a drop-in replacement in most cases.
SCSS to CSS online: compile Sass without npm or Node.js in the browser
Sass (Syntactically Awesome Style Sheets) is a CSS preprocessing language created by Hampton Catlin and developed primarily by Natalie Weizenbaum (the main author for most of its history) and Chris Eppstein. The first version was released in November 2006 as part of the Haml framework for Ruby. The original syntax used indentation instead of curly braces, inspired by Python and YAML, making it more compact but incompatible with existing CSS. This adoption barrier was the catalyst for the creation of SCSS (Sassy CSS), introduced in Sass 3.0 in October 2010: a new syntax fully compatible with CSS3 where any valid CSS file is also valid SCSS. The core features of SCSS — $ prefix variables, selector nesting, the & parent selector for pseudo-classes and variants, @mixin and @include directives for code reuse, and @extend for inheritance — solved the maintainability problems of plain CSS at scale that the industry had been facing for years.
The CSS preprocessor ecosystem had its peak between 2012 and 2018. LESS (created by Alexis Sellier in 2009) was Sass's first serious competitor, using @ instead of $ for variables and gaining massive adoption through Bootstrap 3 (2013). Stylus (created by TJ Holowaychuk in 2010) offered even more flexible syntax but with lower adoption. SCSS won the ecosystem battle partly due to adoption in Bootstrap 4 (2018, which migrated from LESS to SCSS), partly through integration in frameworks like Compass (Chris Eppstein, 2009) that added advanced functions and automatic sprites, and partly by being the standard in Angular (which scaffolds projects with SCSS by default). Sass implementations have evolved significantly: Ruby Sass (2006–2019, the original implementation, now unmaintained), LibSass (C/C++ implementation used by node-sass, deprecated in October 2020), and Dart Sass (the current reference implementation, released in 2016 and available as the npm package sass since 2018).
The need for an online SCSS compiler arises in very specific frontend development workflow contexts. The most common is rapid exploration: a developer wants to test how a specific mixin compiles, verify that a color function works as expected, or understand the CSS output of a particular nesting pattern without creating a new project. The closest alternative is the official Sass Playground (sass-lang.com/playground), but its interface is minimal and does not offer additional features like quick copy or download. Another case is working in environments without installation permissions: corporate machines with npm restrictions, read-only CI/CD environments, or training sessions where you cannot guarantee all attendees have Node.js configured. Convertir.ai's compiler uses Dart Sass compiled to WebAssembly, which runs entirely in your browser at speeds comparable to the native compiler, without sending any line of code to external servers. This makes it safe for compiling stylesheets from production projects or proprietary code.