Does formatting fix broken CSS?

No. It improves readability but cannot guarantee correctness.

Should minified CSS be formatted?

Formatting minified CSS can make it easier to inspect.

Can formatting change behavior?

It should not, but invalid source code can still behave unexpectedly.

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CSS Formatter

Beautify CSS rules into readable blocks.

CSSFormatterCode

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Status

Free

Access

Browser workflow

Mode

Live workspace

Use CSS Formatter online

Enter your input, generate the result, copy the output, or download a processed file when this tool supports export.

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Shared CSS Workspace

Format CSS for review

Uses a standards-aware parser instead of regex replacement. Formatting uses Prettier's CSS parser and preserves comments. Minification removes structural whitespace without rewriting selectors or declaration values.

Browser only

CSS inputMaximum 0.95 MB

Drop one .css file here. CSS stays in this browser and is never executed.

Press Ctrl+Enter or Command+Enter to format.

Upload CSS

Formatter indentationMinifier comments

Open CSS Minifier

Output

Formatted CSS

No CSS output yet

Paste valid CSS, then choose Format or Minify. Parser errors will show a source location when available.

Paste CSS or upload a .css file to begin.

Privacy
CSS files and text are parsed in a browser worker. Input and output are not sent to TanzaiTools servers.

Compatibility
Parsing and formatting do not prove that every declaration works in every browser. Test output in your supported browser matrix.

Safe minification
The minifier avoids selector merging, declaration reordering, value shortening, prefix changes, and other aggressive optimization.

Recent local CSS outputs (0)

Successful outputs up to 146 KB are saved only in this browser.

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Overview

About CSS Formatter

CSS Formatter makes CSS code easier to read by improving indentation and spacing. It is useful for reviewing copied styles, cleaning snippets and preparing code for editing. Formatting does not guarantee valid CSS, so test the final styles in the browser.

Features