CSS to Stylus Converter
Paste CSS and generate clean Stylus with indentation-based rules, optional nesting, optional variables, and a downloadable .styl file.
Last updated: May 20, 2026
CSS to Stylus conversion runs locally in your browser. Your pasted CSS and generated Stylus are not uploaded.
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Buy me a coffeeWhat is CSS to Stylus Converter?
A CSS to Stylus Converter turns standard CSS into Stylus source code. Stylus is a CSS preprocessor that supports concise indentation-based syntax, optional colons, variables, nesting, and other conveniences. Plain CSS can often be rewritten into Stylus by removing braces and semicolons, applying consistent indentation, and converting repeated values into variables where appropriate.
This tool keeps the conversion conservative. It parses CSS rules and at-rules, formats them as readable Stylus, optionally nests selectors with a clear shared parent, and can convert :root custom properties such as --brand-color into Stylus variables such as brand-color = #2563eb. The result is intended as a practical migration starter for existing CSS files, component styles, and examples copied from prototypes or browser developer tools.
How to Use CSS to Stylus Converter
Paste CSS into the input editor.
Keep "Nest matching selectors" enabled when you want rules like .card h2 and .card:hover grouped under .card.
Keep "Convert :root variables" enabled to turn CSS custom properties into Stylus variables.
Toggle "Keep property colons" if your project prefers color: #111827 over the shorter color #111827 form.
Choose the indentation style used by your codebase.
Review warnings, then copy the Stylus output or download it as a .styl file.
Common Use Cases
- Migrating a legacy CSS file into a Stylus-based frontend project
- Converting component CSS into indentation-based Stylus for cleaner source files
- Turning :root custom properties into Stylus variables for build-time styles
- Cleaning CSS copied from a browser inspector before moving it into a .styl file
- Preparing Stylus examples for documentation, templates, or internal UI kits
- Grouping hover, focus, and child selectors under a shared parent selector
- Comparing CSS, LESS, SCSS, and Stylus versions during a stylesheet migration
- Generating a quick .styl file without installing a local converter
Example Input and Output
Converting a card component from CSS into nested Stylus with variables:
:root {
--brand-color: #2563eb;
}
.card {
color: #0f172a;
}
.card h2 {
color: var(--brand-color);
}
.card:hover {
border-color: var(--brand-color);
}brand-color = #2563eb
.card
color #0f172a
h2
color brand-color
&:hover
border-color brand-colorHow This Tool Works
The converter strips comments, parses CSS rule blocks and at-rules, tracks declarations, and renders Stylus with indentation instead of braces. When enabled, it extracts custom properties from :root into Stylus variable assignments, rewrites known var() references, and groups selectors that share a class or ID base into nested Stylus blocks.
Technical Stack
Indentation Matters
Stylus uses indentation to define nesting. Keep a consistent indent size and review generated nesting before committing the converted file.
Runtime CSS Variables
Stylus variables are resolved during preprocessing. Do not convert CSS custom properties that your app changes at runtime for theming or user settings.
Conservative Nesting
The converter only nests single selectors with a clear class or ID prefix. Comma-separated selector lists remain flat to avoid changing cascade behavior.