CSS Preprocessor Converters
Free browser-based converters between every pair of Sass, SCSS, LESS, and Stylus — for migrating a codebase, a build pipeline, or a single file between preprocessors.
Built for developers, by a developer.
All tools run locally in your browser. Your data never leaves your device.
In This Collection
SASS to SCSS Converter
SCSS to SASS Converter
SCSS to LESS Converter
LESS to Stylus Converter
Stylus to CSS Converter
Why this collection exists
Migrate a stylesheet — or an entire build pipeline — between Sass, SCSS, LESS, and Stylus without hand-rewriting variable syntax, mixin calls, and nesting rules. Each converter handles the specific syntax differences between its source and target preprocessor: brace vs. indentation-based nesting, `$variable` vs `@variable` vs bare assignment, and `@mixin`/`@include` vs `.mixin()` vs Stylus mixin calls.
Paste your source stylesheet and get converted output instantly — all conversion logic runs in your browser, so proprietary or unpublished CSS never leaves your machine.
Best fit for
- Teams migrating a legacy Sass or LESS codebase to a new preprocessor standard
- Developers adapting a third-party Stylus or LESS component library into an SCSS project
- Frontend engineers converting a single file quickly without setting up a full build-tool pipeline
- Contributors porting an open-source theme between preprocessor ecosystems
- Students and learners comparing how the same styles are expressed across preprocessor syntaxes
Featured tools in this collection
Start with the strongest tools in this workflow cluster.
SASS to SCSS Converter
Convert SASS indented syntax to SCSS brace syntax. Adds curly braces and semicolons, converts = and + shorthand to @mixin and @include.
SCSS to SASS Converter
Convert SCSS brace syntax to SASS indented syntax. Removes braces and semicolons, converts @mixin/@include to = and + shorthand.
SCSS to LESS Converter
Convert SCSS code to LESS syntax. Maps $variables to @variables, @mixin/@include to .mixin() syntax, and @extend to &:extend().
LESS to Stylus Converter
Convert LESS code to Stylus indented syntax. Removes braces and semicolons, converts @variable to bare variable assignments.
Stylus to CSS Converter
Convert Stylus code to plain CSS. Adds colons, semicolons, and braces; resolves variable assignments; and flattens nested selectors directly in your browser.
SASS to CSS Converter
Convert indented SASS syntax to plain CSS. Adds braces and semicolons, resolves $variables, and flattens nested selectors directly in your browser.
Related categories
More tools like these, organized by category.
All tools in this collection
Browse the complete workflow cluster and jump into the tool you need next.
SASS to CSS Converter
Convert indented SASS syntax to plain CSS. Adds braces and semicolons, resolves $variables, and flattens nested selectors directly in your browser.
SASS to LESS Converter
Convert indented SASS syntax to LESS. Adds braces, maps $variables to @variables, and rewrites =mixin/+include shorthand to LESS .mixin() syntax.
SASS to SCSS Converter
Convert SASS indented syntax to SCSS brace syntax. Adds curly braces and semicolons, converts = and + shorthand to @mixin and @include.
SASS to Stylus Converter
Convert indented SASS syntax to Stylus. Drops semicolons, rewrites $variables as Stylus assignments, and maps =mixin/+include shorthand to Stylus mixin syntax.
SCSS to CSS Converter
Convert SCSS code to plain CSS. Resolves $variables, flattens nested selectors, and inlines simple @mixin/@include directly in your browser.
SCSS to LESS Converter
Convert SCSS code to LESS syntax. Maps $variables to @variables, @mixin/@include to .mixin() syntax, and @extend to &:extend().
SCSS to SASS Converter
Convert SCSS brace syntax to SASS indented syntax. Removes braces and semicolons, converts @mixin/@include to = and + shorthand.
SCSS to Stylus Converter
Convert SCSS code to Stylus indented syntax. Removes braces and semicolons, converts $variables to bare assignments, @mixin/@include to function syntax.
Stylus to CSS Converter
Convert Stylus code to plain CSS. Adds colons, semicolons, and braces; resolves variable assignments; and flattens nested selectors directly in your browser.
Stylus to LESS Converter
Convert Stylus code to LESS. Adds braces and semicolons, rewrites name = value assignments as @variables, and converts Stylus mixin syntax to LESS .mixin() form.
Stylus to SASS Converter
Convert Stylus code to indented SASS. Rewrites name = value assignments as $variables and maps Stylus mixin syntax to SASS =mixin/+include shorthand.
Stylus to SCSS Converter
Convert Stylus code to SCSS. Adds braces and semicolons, rewrites name = value assignments as $variables, and maps Stylus mixin syntax to @mixin/@include.
LESS to Stylus Converter
Convert LESS code to Stylus indented syntax. Removes braces and semicolons, converts @variable to bare variable assignments.
Collection FAQ
Extra context around when to use this toolkit and where to start.
Do these converters run an actual Sass/LESS/Stylus compiler?
No — compiling to plain CSS is a separate operation. These tools translate source syntax directly between preprocessor dialects (e.g. Sass indentation to SCSS braces), preserving variables, nesting, and mixins in the target preprocessor's own syntax rather than compiling them away.
Will complex mixins and functions convert perfectly?
Straightforward variables, nesting, and simple `@mixin`/`@include` patterns convert reliably. Highly dynamic Sass functions or preprocessor-specific features with no direct equivalent may need manual review after conversion.
Is my stylesheet uploaded anywhere?
No. All parsing and conversion happens locally in your browser — nothing is sent to a server.
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