SASS to SCSS Converter Online — Free Tool

Translate indented .sass into brace-and-semicolon SCSS, preserving every $variable, mixin, and nested rule — instantly, in your browser.

Input SASS (indented)

Converted SCSS

What is a SASS to SCSS converter?

A SASS to SCSS converter rewrites a file authored in the original indented Sass syntax (.sass) into the brace-based SCSS syntax (.scss). The two surfaces share the same Sass feature set — $variables, mixins, functions, control flow, modules — and compile to byte-identical CSS. The converter only changes how nesting and declarations are written: it inserts braces around nested blocks and a semicolon after each property.

Migration usually happens when teams modernise a legacy codebase, onboard developers more comfortable with CSS-style syntax, or move to a build pipeline that expects .scss by default (Vite, Next.js with sass-loader, Tailwind plugins). The OpenFormatter converter runs in JavaScript on your machine, so internal stylesheets stay private throughout the migration.

How to convert SASS to SCSS — 4 steps

Paste your .sass source. Indented rules, no braces, no semicolons. Click Load Sample for an alert-component example.
Click Convert. The tool wraps each nested block in braces, terminates properties with semicolons, and preserves variables verbatim.
Inspect the SCSS. The Output panel shows valid SCSS with the Done badge. Compare it against the input — variables and selectors should match exactly.
Save with .scss extension. Drop the output into your project as .scss. Compiled CSS is byte-equivalent to the original .sass file.

Indented .sass in, brace-based .scss out — example

.sass source (indented)

$primary: #2563eb
$radius: 8px

.alert
  background: $primary
  border-radius: $radius
  padding: 12px 16px

  .title
    font-weight: 600

.scss output (braces)

$primary: #2563eb;
$radius: 8px;

.alert {
  background: $primary;
  border-radius: $radius;
  padding: 12px 16px;

  .title {
    font-weight: 600;
  }
}

Braces & Semicolons Inserted

Each nested block wraps in matching { } pairs and every property terminates with a semicolon — the syntax SCSS, Stylelint, and Prettier expect.

Identical Compiled CSS

The Sass language is the same in both surfaces, so dart-sass produces byte-equivalent CSS from the converted .scss file as it did from the original .sass.

Client-Side Only

Indented Sass is parsed in JavaScript inside your browser. Brand tokens, design system variables, and proprietary mixins never leave your device.

Common use cases

check_circleModernising a legacy Ruby on Rails codebase that ships indented .sass partials
check_circleMigrating a stylesheet collection to .scss for Vite, Next.js, or webpack with sass-loader
check_circleStandardising a team on a single Sass dialect to reduce onboarding friction
check_circleEnabling Stylelint and Prettier rules that target SCSS specifically
check_circlePreparing source files for a code review by colleagues who only write SCSS
check_circleConverting documentation snippets from indented Sass to SCSS for a public design system
check_circleAligning a forked open-source theme with its upstream maintainer's .scss convention
check_circleBulk-converting a vendored .sass dependency before fork-and-modify customisation

Why teams move from .sass to .scss

The two syntaxes are equivalent at the language level, but tooling and ecosystem momentum favour SCSS. IDE support is broader: VS Code, JetBrains, and Sublime ship more mature SCSS extensions than indented-Sass extensions. Linting and formatting via Stylelint and Prettier target SCSS by default — indented Sass requires extra plugins. Documentation and tutorials almost universally use SCSS examples, so copy-paste is friction-free. And CSS familiarity means anyone who reads CSS can read SCSS without learning indentation rules. None of this changes the compiled output — the move is about developer experience, not runtime behaviour.

Compile, switch direction, or target another preprocessor?

Convert from CSS, target indented Sass directly, or migrate to LESS — all browser-side.

CSS to SASS SASS to CSS SCSS to LESS

Frequently Asked Questions

Why convert .sass to .scss?

SCSS is the dominant Sass dialect in 2025: better IDE support, friendlier syntax for CSS authors, easier copy-paste from CSS examples, and broader linting / formatting tooling. Teams typically migrate from indented .sass to .scss when onboarding new engineers, integrating with a webpack / Vite pipeline that expects .scss, or standardising a codebase across multiple repos.

Will the compiled CSS change after converting to SCSS?

No. .sass and .scss are two surfaces over the same Sass language — equivalent code in either dialect compiles to byte-identical CSS through the Dart Sass compiler. The conversion only changes the source file syntax, not the runtime behaviour or output.

Are all .sass features available in .scss?

Yes. Variables, mixins, functions, control flow (@if, @each, @for, @while), placeholders, @extend, and modules (@use, @forward) are identical in both syntaxes. The only thing that changes is how you write nesting (indent vs braces) and how you terminate declarations (newline vs semicolon).

How are inline comments handled?

Both syntaxes accept // single-line comments and /* block */ comments, so the converter passes them through unchanged. // comments do not appear in the compiled CSS; /* */ comments do (unless removed by the minifier in production mode).

Can I convert SCSS back to indented Sass?

Yes — use sass-convert from the dart-sass CLI: sass-convert input.scss output.sass. The OpenFormatter site provides one-way SASS → SCSS specifically; for the reverse direction, dart-sass's built-in sass-convert is the canonical tool.

Does the converter rewrite filenames or only the source?

It only rewrites the source code. After running the converter, save the output with a .scss extension and update any @import / @use paths in other files to reference the new filename. Most build tools resolve both .sass and .scss automatically, so import paths often need no changes.

Is my .sass uploaded to your servers?

No. Conversion runs entirely in your browser using JavaScript. .sass containing brand tokens, design system variables, or licensed component code never leaves the device. Open DevTools → Network and verify no requests fire when you click Convert.

Should I use indented .sass or .scss for new projects?

SCSS is the recommended default for new projects in 2025. It is a superset of CSS, so any developer comfortable with CSS can read it immediately, and it has wider tooling (Stylelint, Prettier, IDE extensions). Reach for indented .sass only when contributing to an existing codebase that already uses it.