CSS Beautifier
Beautify or minify CSS instantly, entirely in your browser.
Use the tool ↓About this tool
CSS's syntax is simple in structure — a selector, then a block of property-value declarations wrapped in braces — but that simplicity gets buried the moment a stylesheet is minified for production or generated by a build tool: everything collapses onto a handful of lines, every declaration separated only by a semicolon, every rule packed against the next with no visual separation between one selector's styles and another's. Reading it to find a specific rule or understand a component's full styling means scanning dense, undifferentiated text rather than a document with any visible shape.
Beautifying reconstructs that shape: each selector gets its own line, each declaration inside a rule gets its own indented line, and blank lines separate one rule from the next, so the stylesheet reads the way most style guides recommend writing it by hand. This matters most when debugging — tracking down which rule is setting an unexpected color or margin is dramatically faster in a readable stylesheet than in a one-line minified blob where you're relying on your editor's search rather than your eyes.
Minifying does the inverse for the same reason it matters in HTML and JavaScript: CSS whitespace and formatting have zero effect on how styles apply, so removing it is a pure win for file size and, by extension, page load time — CSS blocks rendering by default while the browser waits for stylesheets to load and parse, so a smaller CSS payload has a directly measurable effect on time-to-first-paint, not just an abstract file-size number.
This tool handles the CSS constructs you'll actually run into day to day: standard selectors and declarations, nested at-rules like @media and @supports (which wrap other rules and need their own indentation level), comments, and multiple comma-separated selectors sharing one rule block. It doesn't validate that your properties or values are spelled correctly or browser-supported — it reformats structure based on braces, colons, and semicolons, the same way the HTML and JavaScript beautifiers in this hub work from their own syntax's structural characters rather than a full specification-level parse. Everything runs locally; nothing you paste is transmitted anywhere.
How to use it
Paste your CSS
Minified or already-formatted, both work the same way.
Choose Beautify or Minify
Beautify adds readable structure; Minify strips it for production.
Review the result
Nested @media and @supports blocks are indented correctly automatically.
Copy the output
Copy directly into your stylesheet or build pipeline.
Example
.card{padding:16px;border-radius:8px}.card h2{font-size:1.25rem}.card {
padding: 16px;
border-radius: 8px;
}
.card h2 {
font-size: 1.25rem;
}Common use cases
Debugging a stylesheet
Beautify minified production CSS to find and understand a specific rule.
Reducing CSS file size
Minify hand-written CSS before deploying it.
Reviewing generated CSS
Reformat output from a build tool or CSS-in-JS library for readability.
Learning from someone else's stylesheet
Beautify a downloaded or inspected stylesheet to study its structure.
Code review
Format CSS consistently before comparing it in a diff.
Cleaning up copy-pasted CSS
Reformat CSS pasted from a tutorial or Stack Overflow answer.