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CSS Formatter error
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// about this tool

CSS Formatter Online

Updated 2026-08-19

Format and beautify CSS online for free. Paste minified or inconsistently indented CSS and SnapTools rewrites it with one declaration per line, consistent spacing, and clearly nested at-rules — ready to copy or download. Everything runs in your browser, so your stylesheet is never uploaded.

Minified or machine-generated CSS is nearly impossible to edit or review by hand. This tool restores readable structure without touching a single selector or value, so the rendered output stays identical while the source becomes easy to scan, diff, and maintain.

// how to use

  1. 1 Paste minified or messy CSS into the input panel on the left.
  2. 2 SnapTools re-indents it with one rule per line and consistent spacing as you type.
  3. 3 Choose your indent size, then copy or download the formatted stylesheet.

// examples

Minified CSS to readable
Input
body{margin:0;font:14px/1.5 sans-serif}a{color:blue}
Output
body {
    margin: 0;
    font: 14px/1.5 sans-serif;
}

a {
    color: blue;
}
Nested media query
Input
@media(max-width:600px){.nav{display:none}}
Output
@media (max-width: 600px) {
    .nav {
        display: none;
    }
}

// common uses

Making minified or third-party CSS readable for editing Standardising indentation across a stylesheet Reviewing a diff of CSS changes cleanly Learning how a compressed stylesheet is structured

// faq

Is my CSS uploaded to a server?
No. Formatting runs entirely in your browser, so your stylesheet never leaves your machine.
Does it change how my CSS behaves?
No. Only whitespace and indentation change — selectors, properties, and values are preserved exactly, so the rendered result is identical.
Can it handle media queries and nested rules?
Yes. Media queries, keyframes, and other at-rules are indented so their inner rules are clearly nested and easy to scan.
What indent size should I use?
Match your project. Four spaces is a common default, but you can switch to two spaces or tabs to fit your existing code style.
How is this different from the CSS Minifier?
The formatter expands CSS to make it readable for editing; the minifier does the opposite — it strips whitespace to shrink the file for production.

// works with your data

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Use this via API

Get a free API key → 
curl -X POST https://thesnaptools.com/api/v1/tools/css-formatter \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"code":"body{margin:0;font:14px/1.5 sans-serif}a{color:blue}"}'