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Hazuu Tools

CSS Formatter & Beautifier

Format, beautify, and clean up your CSS code instantly in a secure, client-side environment.

Input CSS
Output
Formatted output will appear here...
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About CSS Formatter

CSS Formatter is a free online tool that takes minified, compressed, or inconsistently indented CSS and restructures it into clean, human-readable code. It adds proper line breaks between rules, aligns property declarations, and applies your chosen indentation style — 2 spaces, 4 spaces, or tabs — so the output matches your project conventions. The same tool also includes a minifier that strips all whitespace and comments in one click, ready for production deployment.

The formatter is built for the day-to-day situations where readable CSS matters: opening a vendor stylesheet to understand what a third-party library is doing, reviewing a colleague's diff where everything landed on one line, or untangling the output of a CSS-in-JS build step before filing a bug report. Rather than manually reformatting each selector block by hand, you paste, click Format, and get correctly structured code in seconds.

All processing happens entirely in your browser using the js-beautify library. Your CSS never leaves your machine — it is not uploaded, logged, or processed by any server. That makes this tool safe for internal design tokens, confidential brand stylesheets, or any proprietary CSS you would rather not send to a third-party service. There are no file-size limits, no sign-up, and no cost.

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Key Features

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Configurable indentation

Choose between 2-space, 4-space, or tab indentation before formatting. The output matches whatever convention your project or team uses.

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One-click minification

The built-in minifier strips all comments and collapses whitespace into a single compact line, producing production-ready CSS without switching to a separate tool.

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File upload and download

Load a .css or .txt file directly from your computer and download the formatted result as a .css file — no copy-pasting required for larger stylesheets.

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100% client-side processing

Formatting runs locally in your browser via js-beautify. Nothing is uploaded, so confidential design tokens, internal stylesheets, and proprietary styles stay on your machine.

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Handles real-world CSS

At-rules like @media, @keyframes, and @import are indented and line-broken correctly, not flattened or dropped the way simple text-replace approaches can be.

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Comment preservation on format

Beautifying keeps your CSS comments intact so documentation and TODO notes survive the formatting pass. Only the minify action removes them, as expected.

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How to Use

01

Paste Your CSS

Copy your raw or minified CSS code and paste it into the input editor on the left.

02

Format or Minify

Click "Format" to beautify your code with proper indentation, or "Minify" to compress it for production.

03

Copy the Result

Use the copy button to grab your formatted CSS, or download it as a .css file.

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Example

Minified CSS with an @media rule is expanded into properly indented, readable blocks. Each selector gets its own line, every property is on its own indented line, and the media query block is nested correctly.

Minified CSS input
.btn{display:inline-flex;align-items:center;padding:8px 16px;border-radius:6px;font-weight:600;background:#7c3bed;color:#fff}@media(max-width:768px){.btn{padding:6px 12px;font-size:.875rem}}
Formatted CSS output
.btn {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  border-radius: 6px;
  font-weight: 600;
  background: #7c3bed;
  color: #fff;
}

@media (max-width: 768px) {
  .btn {
    padding: 6px 12px;
    font-size: .875rem;
  }
}
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Common Use Cases

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    Reading third-party and vendor stylesheets

    CSS from npm packages, UI libraries, and CDN bundles is almost always minified. Paste it into the formatter to understand what the library is actually doing before overriding or extending its rules.

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    Debugging CSS build output

    When a PostCSS pipeline, CSS module bundler, or Tailwind configuration produces unexpected output, formatting the result makes it easy to spot duplicate properties, overrides, and specificity problems that are invisible in a single long line.

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    Reviewing stylesheets before code review

    A pull request that changed a generated or auto-formatted stylesheet can be hard to review in diff view when everything is on one line. Beautify both the before and after versions to produce a meaningful, property-level diff.

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    Preparing a stylesheet for production from a working draft

    Once a stylesheet is finished and tested, run it through the built-in minifier to strip comments and whitespace in one step — no need to switch to a dedicated CSS minifier tool.

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    Migrating or auditing design tokens

    When moving CSS custom properties, color variables, or spacing scales between projects, a formatted file makes it straightforward to scan all declared values and spot inconsistencies or duplicates.

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Frequently Asked Questions

What is a CSS Formatter? expand_more
A CSS Formatter is a tool that takes minified, compressed, or poorly indented CSS code and restructures it with consistent indentation, line breaks between rules, and proper spacing to make it readable and editable.
Is my CSS code safe when using this tool? expand_more
Yes. All formatting is performed entirely in your browser using JavaScript. Your CSS is never uploaded to any server, ensuring complete privacy and security.
Can I choose the indentation style? expand_more
Yes. You can select between 2 spaces, 4 spaces, or tab-based indentation using the indent selector in the toolbar before formatting your code.
Does this tool remove CSS comments? expand_more
The formatter preserves your CSS comments when beautifying. The minify function strips comments to reduce file size, which is standard minification behavior.
Can I upload a CSS file directly? expand_more
Yes. Click the upload button in the toolbar to load a .css or .txt file from your computer directly into the editor.
How is CSS Formatter different from CSS Minifier? expand_more
CSS Formatter and CSS Minifier are opposite operations. The formatter expands compressed CSS into readable, indented code for humans to edit and understand. The minifier does the reverse — it removes whitespace and comments to produce compact CSS for production. This tool includes both actions on the same page: use Format when you need to read or edit CSS, and Minify when you are deploying it.
How does CSS Formatter differ from HTML Formatter or JS Formatter? expand_more
Each formatter understands the syntax rules of its own language. CSS Formatter correctly handles CSS-specific structures: selector blocks, property-value pairs, at-rules like @media and @keyframes, and nested rule indentation. Using an HTML or JS formatter on CSS would break the output because those tools apply different grammar rules.
Does it correctly format @media queries and @keyframes? expand_more
Yes. The tool uses js-beautify, which understands at-rules and correctly indents the nested rule blocks inside @media, @keyframes, @supports, and similar constructs. The indented structure reflects the actual nesting of the rules.
Is there a file size limit? expand_more
There is no fixed limit. Because all processing happens locally in your browser, you can format large stylesheets — the only constraint is your device memory and browser performance.