scss.landing Open editor

web/scss

SCSS to CSS Compiler with a Live Style Preview

Paste SCSS, get CSS — compiled by Dart Sass on your own device, and then applied to a real page so you can check the output does what you meant rather than only that it parsed.

Compile SCSS now Do you still need it?
compilerDart Sass
runsin your browser
uploadnothing sent
outputexpanded or minified
input.scssoutput.css
$primary: #0071e3;

​.card {
  padding: 24px;

  &:hover { box-shadow: 0 8px 24px #0002 }

  .title { color: $primary }
}
compiled 4ms

01 platform

What a converter alone cannot tell you

Most SCSS-to-CSS tools print the output into a box and stop. That confirms it compiled. It does not confirm it was right.

  • The compiled CSS is applied, not just printed

    Output lands in a live page, so a mixin that produced a valid but wrong rule is visible immediately rather than three steps later in your project.

  • Dart Sass, not a partial reimplementation

    The reference implementation compiled to WebAssembly. Loops, @use, @forward, maps and modules all behave as the CLI does — several browser converters support only nesting and variables.

  • Nothing is uploaded

    Compilation happens on your device. For a stylesheet from a client project, that is the difference between a tool you can use at work and one you cannot.

  • It does not stop at one file

    Partials, @use across files and a real folder structure work, which is where a paste-one-box converter runs out of road.

02 deep dive

Whether you still need SCSS at all

The honest answer for a lot of projects in 2026 is no, and a page selling a compiler should say so.

Native CSS nesting shipped. The & selector works in current Chrome, Firefox and Safari. For a new project targeting modern browsers, that alone removes the most common reason to add a build step.

Custom properties replaced most variables. --primary cascades, responds to media queries and can be read by JavaScript, which a compile-time $primary cannot.

color-mix() and light-dark() replaced most color functions. Lightening, darkening and theming are native now, and they work at runtime rather than being baked in.

What SCSS still wins at: loops and maps that generate many rules, @use across a large partial library, and mixins with real logic. If your stylesheet has those, it earns its build step — and this compiles it.

nesting
native now
variables
custom properties
color
color-mix(), light-dark()
scss wins
loops, maps, @use
native.css
/* no preprocessor needed */
.card {
  --pad: 24px;
  padding: var(--pad);

  &:hover { box-shadow: 0 8px 24px #0002 }
}

03 pipeline

What happens when you press compile

Four stages, all on your device, typically finishing in single-digit milliseconds.

  1. Parse

    The SCSS is read into a tree. A syntax error stops here and reports a line and column against your input rather than producing partial output.

  2. Resolve

    @use, @forward and @import are followed, variables and maps resolved, mixins expanded. An undefined variable fails here with the name in the message.

  3. Emit

    Plain CSS is produced, expanded or compressed as you choose. Nesting is flattened into full selectors and the source order preserved.

  4. Apply

    The result is attached to a live page so you can see it working — the step that separates this from a converter that only prints text.

04 features

What the compiler supports

Dart Sass is the reference implementation, so the answer is essentially everything the CLI does.

  • Variables, nesting and the parent selector

    $vars, arbitrary nesting depth and & including compound uses like &--modifier and &:hover.

  • Mixins, functions and @extend

    @mixin and @include with arguments and defaults, @function with real logic, and placeholder selectors through @extend.

  • Loops and maps

    @each, @for, @while and Sass maps — the features that actually justify a preprocessor, and the ones thinner browser converters usually drop.

  • The module system

    @use and @forward with namespacing and configuration, across a real folder of partials rather than one pasted file.

  • The indented Sass syntax

    Both .scss and the older .sass indented syntax compile on the same path.

  • Expanded or compressed output

    Readable CSS while you work, minified when you are copying it into something.

05 workflow

What a failed compile tells you

Sass errors are unusually good, and the main thing a converter can get wrong is throwing that information away.

session
  • compile → styles.scss
  • resolve @use 'tokens' ok
  • Error: Undefined variable.
  • styles.scss 14:11 color: $accent
  • define $accent in tokens → compile
  • compiled 4ms · 38 rules · applied to preview

  • Errors quote your line

    Dart Sass reports the file, the line, the column and the offending source, and none of that is discarded on the way to the screen.

  • Partials resolve by name

    @use 'tokens' finds _tokens.scss the way the CLI does, so a multi-file stylesheet compiles as it would locally.

  • The last good output stays

    A failed compile leaves the previous CSS applied, so you keep the working version on screen while you fix the broken one.

06 ecosystem

A stylesheet among other languages

A .scss file can sit beside a React component and a Python script; XCODX picks the right handling per file rather than per project.

  • React
  • Vue
  • Angular
  • Svelte
  • SolidJS
  • Lit
  • HTMX
  • Vite
  • TypeScript
  • JavaScript
  • HTML
  • CSS
  • SCSS
  • Less
  • Pug
  • Tailwind
  • Bootstrap
  • Vuetify
  • Ant Design
  • shadcn/ui
  • Phaser
  • Node.js
  • Python
  • Java
  • C++
  • C#
  • Go
  • Rust
  • Ruby
  • PHP
  • Kotlin
  • Swift
  • SQL
  • Bash

07 languages

Every language the editor compiles

Highlighting and IntelliSense cover 70+ languages. These are the ones XCODX also compiles or executes for you.

Compiled in your browser11

Zero build step. Transform runs on a Web Worker, so typing never blocks.

  • JSX
  • TSX
  • TypeScript
  • Vue SFC
  • Svelte
  • Angular (JIT)
  • SolidJS
  • SCSS
  • Sass
  • Less
  • Pug

Rendered natively8

Straight to the live preview, no transform in the way.

  • HTML
  • CSS
  • JavaScript
  • JSON
  • Markdown
  • Jupyter (.ipynb)
  • SVG
  • YAML

Executed on demand22

70+ languages run through a self-hosted Piston engine. stdout, stderr, images and tracebacks land in the console.

  • Python
  • Java
  • C
  • C++
  • C#
  • Go
  • Rust
  • Ruby
  • PHP
  • Kotlin
  • Swift
  • Lua
  • Scala
  • Perl
  • Haskell
  • Elixir
  • Dart
  • R
  • Julia
  • SQLite
  • Bash
  • PowerShell

08 questions

Compiling SCSS — common questions

Questions about the conversion itself.

Is my SCSS uploaded anywhere?

No. Dart Sass is compiled to WebAssembly and runs on your own device, so the stylesheet never leaves the tab. For code from a client project that is usually the deciding factor.

Which Sass implementation is this?

Dart Sass, the reference implementation the Sass team maintains. LibSass has been deprecated for years and misses newer features, so output here matches what the current CLI produces.

Do @use and @forward work, or only @import?

All three. @use and @forward work with namespacing and configuration across a folder of partials — the module system, not just the legacy import.

Do loops and maps compile?

Yes — @each, @for, @while and Sass maps. These are the features that actually justify a preprocessor, and they are the first thing thinner browser converters drop.

Can I convert CSS back to SCSS?

There is nothing to convert. Valid CSS is already valid SCSS — paste it into an .scss file and it compiles unchanged. Adding nesting and variables afterwards is an editing job rather than a conversion.

Do I still need SCSS in 2026?

Often not. Native CSS nesting works in current browsers, custom properties replaced most variables, and color-mix() and light-dark() replaced most color functions. SCSS still wins for loops, maps and a large @use partial library — if your stylesheet has those, it earns its build step.

Can I get minified output?

Yes. Compressed or expanded, switchable — readable while you work, minified when you are copying it into something.

Can I compile a whole folder of partials?

Yes. This is a real project rather than a single textarea, so @use 'tokens' resolves _tokens.scss from the tree exactly as the CLI would.

Do I need to install anything to use XCODX Studio?

No. XCODX Studio is a browser-based IDE — the editor, the compilers and the preview all run client-side. There is no download, no package manager to set up and no configuration file to write. Opening the editor is the whole setup step.

Where is my code stored?

In your own browser. Projects, file history and Git objects live in local storage on your device and are never uploaded to a server. That also means XCODX works offline: it is a Progressive Web App, so you can install it and keep coding with no connection.

Is XCODX Studio free?

Yes. The editor, the live preview, the 70+ language runtimes, npm installs, Git and the integrated terminal are all free to use.

Can I use XCODX on a tablet or Chromebook?

Yes. The editor is a responsive web app, so a Chromebook, an iPad or an Android tablet gets the same compilers and the same preview a laptop does — there is no desktop-only build, because there is no build to install at all. The layout adapts to the screen rather than shrinking a desktop UI into it.

Can I export a project or move it to my own machine?

Yes. Export the whole project as a zip with its folder structure intact and open it locally, or commit it and push. It is ordinary source on disk from that point on — no proprietary format and no lock-in, which is also why importing an existing repository from GitHub works the same way in reverse.

Nothing to install

Compile SCSS to CSS now

Dart Sass in a few milliseconds on your own device, with the output applied to a live page rather than only printed into a box.

Compile SCSS now Read the docs