CSS Formatter

A CSS formatter that enforces consistent styling for developers, teams, and code reviews by producing readable, standardized CSS from input styles.

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1,888+
Total Calculations Run
< 15ms
Browser Execution Speed
100%
Client-Side Privacy
4.9 / 5.0
User Satisfaction

Worked Example & Common Values

Below is a sample worked calculation demonstrating how CSS Formatter processes input data instantly inside your browser.

Sample Input Minified string: {"id":1,"status":"active","roles":["admin"]}
Computed Result { "id": 1, "status": "active", "roles": [ "admin" ] }
Execution Mode Client-Side In-Browser JS
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About This Tool

The tool parses input CSS and outputs a consistently formatted version according to selected style rules. It preserves comments and strings while restructuring whitespace, braces, and semicolons for readability. It is designed for developers who enforce a style guide, code reviewers seeking reduced diffs, and teams aiming for uniform CSS across projects.
Internally, a CSS parser builds an AST, then a rewriter applies indentation, line breaks, and property grouping. Users select a format: expanded, compact, or minified, and may configure indent size and maximum line length. The system can also sort properties or preserve original order to align with team conventions. The result is deterministic given the same inputs and options, suitable for PRs and automated checks.
This tool emphasizes formatting quality over semantic changes; it does not transform SCSS/LESS syntax or resolve vendor-prefixed properties beyond standard CSS semantics. It benefits frontend teams by improving readability, making diffs smaller, and accelerating onboarding for new contributors. The formatter supports common CSS constructs such as selectors, declarations, blocks, and at-rules like @media, while maintaining proper nesting and braces structure in a consistent manner.

How to Use

  1. Provide inputs: paste your CSS into the source field.
  2. Choose format: select expanded, compact, or minified.
  3. Configure options: set indent size, max line length, and whether to preserve comments.
  4. Run formatting: execute the formatter to generate output.
  5. Review and export: copy formatted CSS or export as needed.
How to use css formatters

Frequently Asked Questions

Find Quick Answers

Does it preserve comments?
Yes. Comments are preserved by default and kept in their original relative positions within the code blocks, ensuring readability after formatting.
Can I customize formatting rules?
Yes. You can choose a style (expanded, compact, minified), set indent size, adjust max line length, and enable or disable property sorting to match your team conventions.
Does it handle at-rules like @media?
Yes. At-rules are parsed and formatted with consistent indentation and braces. Nested blocks are preserved in structure, and the output remains valid CSS.
Is minification supported?
Yes. Minified output collapses whitespace and line breaks while preserving valid CSS syntax, making it suitable for production assets.

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