SASS to Stylus Converter Online

Translate indented SASS to Stylus — both indent-based, minor syntax differences (variable assignment, optional colons). 100% in your browser.

Input SASS

Stylus Output

What is a SASS to Stylus Converter?

A SASS to Stylus converter rewrites the indented Sass syntax into Stylus. Both languages skip braces and semicolons in favour of meaningful indentation, so this is the smallest possible change between preprocessors. The converter only switches variable assignment from $name: value to the Stylus form $name = value and the output is a compile-ready .styl file.

If your team is already comfortable with indented preprocessor syntax, migrating between SASS and Stylus is the most painless transition possible — same visual structure, near-identical declarations.

How to convert SASS to Stylus — 4 steps

Paste your SASS. Drop a .sass file into the Input panel, or click Load Sample.
Click Convert. Indentation is preserved, variable assignment switches from : to =, and the output is Stylus.
Review the Stylus. Confirm $variables, selectors, and nested rules look right. Mixins need a manual rewrite to Stylus call syntax.
Save as .styl. Compile with stylus -p input.styl or wire it into webpack via stylus-loader.

Sample SASS in, Stylus out

Input — SASS (indented)

$primary: #66ccff
$padding: 12px

.nav
  display: flex
  align-items: center
  padding: $padding 24px
  background: #1a1a1a

.nav a
  color: #fff
  margin-right: 16px

.nav a:hover
  color: $primary

Output — Stylus

$primary = #66ccff
$padding = 12px

.nav
  display: flex
  align-items: center
  padding: $padding 24px
  background: #1a1a1a

.nav a
  color: #fff
  margin-right: 16px

.nav a:hover
  color: $primary

Both Indent-Based

SASS and Stylus share the same structural model. The converter only adjusts variable assignment — indentation carries over directly.

Stylus CLI Compatible

Output compiles with the official stylus CLI and stylus-loader for webpack and Vue-CLI. No flags required.

Client-Side Only

Translation runs in JavaScript inside your browser. .sass source never leaves your machine.

Common use cases

check_circleMigrating a Sass codebase to Stylus for use in a Vue.js + Pug stack
check_circleStandardising a Vue project on Stylus rather than mixing SASS and Stylus
check_circlePorting design-system tokens from .sass to .styl with minimal change
check_circleConverting indented SASS components to Stylus for Express applications
check_circleProducing .styl partials from existing .sass component files
check_circleBootstrapping a Stylus design system from existing SASS source
check_circleSide-by-side compare indented SASS vs Stylus on a real component
check_circleModernising a SASS codebase to the most concise indent-based preprocessor

SASS vs Stylus — when to switch

SASS and Stylus look almost identical — both rely on indentation. Sass has the bigger ecosystem (Dart Sass, sass-loader, broader tooling); Stylus is more concise (optional colons, optional quotes, = for variable assignment). Pick Stylus if your team values keystroke economy and works in Vue.js or Pug-template ecosystems. Pick Sass if you want the broadest tooling and best-in-class IDE support. The conversion is mechanical and reversible — see Stylus to SASS for the reverse path.

Need to go further?

Convert between every CSS preprocessor — all browser-side.

Stylus to SASS SASS to CSS SASS to LESS

Frequently Asked Questions

How similar are SASS and Stylus?

Very similar structurally — both use indentation instead of braces, both omit semicolons. The differences: Stylus makes colons optional in declarations and uses = for variable assignment (vs Sass : for both). The converter handles those small syntax differences and the output is a compile-ready .styl file.

Why migrate from SASS to Stylus?

Stylus is even more concise — colons and quotes are optional, and the variable assignment uses = which is closer to JavaScript. Teams in Vue.js or Express + Pug ecosystems often prefer Stylus for the visual cleanliness. Also, if you are migrating between teams that use different preprocessors, the indent-based-to-indent-based migration is the lowest-friction path.

Are nested selectors preserved?

Yes. Both Sass and Stylus use indentation for nesting — the structure carries over directly with no manual changes. The & parent reference works identically in both languages.

How do SASS mixins translate?

SASS uses @mixin name and @include name (or = and + shorthand). Stylus calls mixins like properties: border-radius 4px. The converter handles syntax for variables and structure, but mixin definitions and call sites need a manual rewrite — usually a few minutes per component.

Will the Stylus output compile with the stylus CLI?

Yes. Save with a .styl extension and run stylus -p input.styl to print the compiled CSS, or stylus input.styl to write a .css file alongside the source. stylus-loader for webpack and Vue-CLI work the same way.

What about @if / @each / @for control structures?

Stylus has its own control syntax (if/else without @, for loops). The converter preserves the existing @-prefixed forms which Stylus also accepts. After conversion, optionally rewrite to Stylus-native if/for syntax for terseness.

Does it handle interpolation?

SASS interpolation is #{$varName}. Stylus uses {varName} in selectors and string concatenation. The converter passes #{...} through; review interpolation-heavy stylesheets after conversion to switch to Stylus-native syntax.

Is my source uploaded?

No. Conversion runs entirely in your browser as JavaScript. .sass source never leaves the device. Verify in DevTools — Network tab stays empty when you click Convert.