How it works
How to use the SASS to Stylus
Paste SASS
Paste your stylesheet or drop a .sass file.
Convert
The output updates as you type; compile errors show their line and column.
Copy the Stylus
Copy it or download it as a .styl file.
How the conversion works
SASS is first compiled to plain CSS with Dart Sass, the reference Sass compiler, which resolves variables, mixins, functions and nesting. The CSS is then rebuilt as nested Stylus: rules that share a selector prefix are grouped, pseudo-classes become &:hover-style children, and media queries stay as blocks.
Because the SASS is compiled first, variables and mixins are resolved to their final values in the Stylus output.
Built for developers
Why developers use it
Private by design
Runs 100% in your browser. Nothing you paste is uploaded, logged or stored on a server.
Instant results
Output updates as you type, with precise error locations when something is wrong.
Works offline
Once loaded, the tool keeps working without a connection. Install it as an app if you like.
Free, no sign-up
No accounts, no limits, no watermarks.
FAQ
Frequently asked questions
Are SASS variables kept?
They are resolved to plain values during compilation, so the Stylus output is equivalent but uses literal values.
Is anything sent to a server?
No. The compilers run in your browser as JavaScript/WebAssembly.
Is my data uploaded anywhere?
No. Everything runs locally in your browser — nothing you paste or open is sent to a server, logged or stored. The tool keeps working offline once the page has loaded.
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