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CSS Beautifier

100% Free

Pretty-print minified CSS — preserves comments, parens (calc/url/var), string literals; canonical 'prop: value;' formatting.

Real-time
Client-Side
Idempotent
Indent
Beautified
Beautified CSS appears here…

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  • Responsive design
  • Lightweight & fast
  • No backend required
  • Always up-to-date 
<iframe
  src="https://tools.town/embed/css-beautifier/"
  width="100%"
  height="600"
  style="border:none; border-radius:12px;"
  loading="lazy"
  title="CSS Beautifier">
</iframe>

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How to Use

  1. 1 Paste minified or messy CSS into the input
  2. 2 Pick indent — 2-space, 4-space, or tab
  3. 3 Beautified output appears instantly
  4. 4 Copy back into your stylesheet

Features

  • Brace-aware indentation (handles nested @media)
  • Preserves comments, string literals, parens
  • Canonical `prop: value;` spacing
  • Three indent options
  • Idempotent — beautify(beautify(x)) === beautify(x)
  • 100% client-side

Why it Matters

Reading minified CSS in DevTools is painful. A reliable in-browser beautifier gets you a readable view fast — useful for understanding third-party CSS, debugging shipped bundles, or formatting hand-rolled CSS to a consistent style without installing Prettier.

★★★★★

Use Cases

Reverse-engineer minified CSS

Read a third-party stylesheet to understand its structure

Style consistency

Normalise hand-written CSS to canonical formatting

Code review

Format minified diff output before reviewing

Frequently Asked Questions

Why doesn't this split `calc()` or `url()` across lines?
Those expressions are syntactically self-contained. Splitting them would break the parser. The beautifier tracks parenthesis depth and emits no newlines inside parens.
Will it preserve my comments?
Yes — `/* ... */` blocks pass through verbatim. We do NOT format the comment content.
What's 'idempotent' mean here?
Running the beautifier on already-beautified output produces identical output. So it's safe to run as part of a pre-commit hook or CI step without churn.
📖

Want to understand the math?

Browse all guides →
How to Use CSS Beautifier
css

How to Use CSS Beautifier — Complete Guide

Learn how to format and indent minified or messy CSS instantly using Tools.Town's free CSS Beautifier.

8 May 2026

5 min read

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