Stylus to CSS

Convert simple Stylus syntax into readable CSS

Two directions are available. In Stylus-to-CSS mode, it reads indentation as nesting, adds braces around parent blocks, and formats common leaf lines such as color #333 as color: #333;. A line like primary = #1890ff is rendered as a CSS custom-property declaration. This suits basic snippets.

The reverse direction passes CSS text through unchanged because ordinary CSS is valid as a subset of Stylus. It does not remove braces or refactor declarations into indentation form. Stylus supports variables, functions, mixins, and imports that this page does not compile.

What the conversion does to a small snippet

A selector followed by indented declarations can become:

.card {
  color: #333;
  padding: 12px;
}

Indentation controls block nesting. A malformed indent can place a closing brace incorrectly. Full Stylus constructs such as mixins, functions, imports, interpolation, or complex expressions need a real Stylus compiler and a review of the generated CSS.

Choose the direction that matches the task

Use Stylus → CSS to add basic punctuation to a simple indented snippet. Use CSS → Stylus to carry valid CSS into a Stylus file as-is, then make any desired variables or nesting changes yourself. Inspect the output before using it in a project.

Convert, inspect, then test

1. Set source and destination

   Choose CSS → Stylus or Stylus → CSS. Switching direction places the current output into the input area.

2. Start with a short sample

   Try one selector and a few declarations. Keep Stylus indentation consistent so parent and child lines are clear.

3. Run the conversion

   Enter a snippet and run the converter; copy the result when ready.

4. Review in your project

   Check braces, selectors, variables, comments, functions, and nested rules with the actual build setup before shipping.

Questions about the output

Validate before using generated CSS

A result that resembles CSS has not necessarily passed a complete Stylus compilation.

• The converter does not fully parse Stylus variables, mixins, functions, imports, loops, conditions, interpolation, or complex expressions.
• Nested selectors remain nested blocks rather than being fully expanded to traditional flat CSS.
• Indentation errors can change block structure, and comments may be removed.
• Keep the original snippet and run output through the build and browser checks used by your project.