BYTETOOLS

CSS Formatter

Format and beautify CSS online: one declaration per line, tidy indentation, spaces after colons and support for nested at-rules. Free and 100% private.

What is the CSS Formatter?

The ByteTools CSS Formatter expands minified or messy stylesheets into a readable layout: every declaration on its own line, a space after each colon, consistent indentation inside rules, and proper nesting for at-rules like @media and @supports.

  • One declaration per line with a space after each colon
  • Indents rules nested in @media, @supports and other at-rules
  • Preserves comments on their own lines
  • Blank line between top-level rules for readability
  • Built-in Minify button for the reverse operation
  • 100% client-side — CSS never leaves your browser

How to use the CSS Formatter

  1. 1

    Paste your CSS into the input box.

  2. 2

    Choose an indentation style: 2 spaces, 4 spaces or tab.

  3. 3

    Click Format to beautify, or Minify to compress instead.

  4. 4

    Copy the result or download it as a .css file.

About the CSS Formatter

The ByteTools CSS Formatter expands minified or messy stylesheets into a readable layout: every declaration on its own line, a space after each colon, consistent indentation inside rules, and proper nesting for at-rules like @media and @supports. Comments are kept and placed on their own lines.

It is the quickest way to inspect a production stylesheet, tidy CSS copied from a website, or normalize formatting before a code review. A Minify button reverses the process when you are done, compressing the stylesheet back down for deployment.

The formatter is a hand-written parser that respects strings and comments, and it runs 100% locally in your browser — your CSS never leaves your machine.

Frequently asked questions

How do I beautify minified CSS?

Paste the minified stylesheet and click Format. The tool splits every rule onto multiple lines — selector, one declaration per line, closing brace — and indents anything nested inside at-rules like @media, turning a single unreadable line into a normal stylesheet.

Does formatting CSS affect how the page renders?

No. CSS ignores whitespace between tokens, so adding line breaks, indentation and spaces after colons produces byte-different but functionally identical styles. Selectors, properties and values are not rewritten.

Does the formatter handle @media queries and nested at-rules?

Yes. Rules inside @media, @supports, @keyframes and similar blocks are indented one extra level, and the braces line up with their parent, so responsive breakpoints are easy to scan.

What happens to comments in my CSS?

Comments are preserved. Standalone comments are placed on their own line at the current indentation, and the Minify button removes them entirely if you want the smallest possible file.

Is my stylesheet uploaded anywhere?

No. Formatting is done entirely in your browser with JavaScript. Your CSS is never sent to a server, which makes the tool safe for proprietary design systems and unreleased themes.

Guides for CSS Formatter

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