Why Would You Need to Format CSS?
CSS files in production are often minified for performance — every whitespace, newline, and comment stripped out. When you need to understand, edit, or debug that CSS (perhaps from a third-party library, a theme, or a production stylesheet you don't have the source for), the minified single-line format is completely unreadable. CSS formatting expands it back into a human-readable structure.
CSS formatting is also useful for standardizing inconsistent code written by different developers — enforcing one consistent brace style, indentation level, and property-per-line convention across a team.
CSS Formatter vs CSS Minifier
| Tool | Input | Output | Purpose |
|---|---|---|---|
| Formatter | Minified or messy CSS | Clean, readable CSS | Development, debugging, reading |
| Minifier | Readable CSS | Compressed single-line CSS | Production deployment |
How to Format CSS Online
Paste Your CSS
Paste any CSS — minified production CSS, inconsistently formatted code, or a stylesheet from any source.
Set Formatting Options
Choose indent size (2 or 4 spaces), brace style (opening brace on same line or new line), and selector grouping.
Format & Copy
Beautifully formatted CSS appears instantly. Each selector on its own line, each property indented and terminated with a semicolon.
CSS Formatting Conventions Our Tool Applies
- Each selector on its own line (multiple selectors separated by commas get separate lines)
- Opening brace on same line as selector:
h1 { - Each property-value pair on its own indented line:
color: #fff; - Closing brace on its own line:
} - Single blank line between rule blocks
- Semicolons added at end of every declaration (even if missing in minified source)
Team Standards: Use the formatter with your team's preferred settings (2-space vs 4-space, same-line vs new-line brace) to normalize all CSS to one consistent style before committing to version control.
Alphabetically Sorting CSS Properties
Our formatter optionally sorts properties alphabetically within each rule block. While this is a team preference rather than a requirement, alphabetical sorting makes it instantly obvious when a property is missing, prevents duplicate properties, and makes code reviews faster since reviewers know exactly where to look for any property.
Format CSS Free
Expand minified CSS to readable format. Indent options, selector formatting, instant output.
Format CSS NowCSS Linting After Formatting
Formatting makes CSS readable, but it doesn't catch errors or bad practices. After formatting, run the CSS through a linter (like Stylelint) to catch: duplicate selectors, overridden properties, invalid values, browser-incompatible features, and unused declarations. Our tool highlights syntax errors found during formatting so you can address them immediately.
ToolMatrix CSS Formatter
Formats and beautifies any CSS — minified, messy, or inconsistent. Configurable indent size, brace style, optional property alphabetization. Handles vanilla CSS, SCSS structure, and CSS custom properties. Free, browser-based, instant, no account needed.