CSS Formatter & Beautifier
Transform unreadable or minified CSS into clean, consistent stylesheets in real time.
- Runs in your browser
- Free, no signup
CSS formatting and minification run client-side in your browser — your stylesheets are never uploaded.
Compressed and unindented CSS stylesheets are difficult to debug and inspect. ToolDuck CSS Formatter cleans up selectors, aligns properties, adds clear line breaks between rule sets, and indents media queries.
Whether you are inspecting third-party CSS or preparing a stylesheet for code review, this tool produces consistent, standards-compliant CSS in seconds.
How to use this tool
- Paste your CSS code into the editor or click "Load Sample".
- Select your preferred indentation level (2 spaces, 4 spaces, or Tab).
- Click "Format / Beautify" to structure rules, or "Minify" to strip comments and create compact CSS.
- Copy the formatted CSS or click "Download .css" to save your stylesheet.
Media Queries and Custom Properties Support
The formatter handles nested @media, @keyframes, @supports, and @font-face rules, providing proper two-level indentation.
CSS custom properties (--brand-color: #2563eb;) and complex values like calc() or cubic-bezier curves are preserved without distortion.
Frequently asked questions
Does this formatter preserve comments?
Yes. Format mode preserves block comments (/* ... */). Minify mode strips comments to maximize byte savings.
Can it format CSS variables and modern selectors?
Yes. CSS variables, pseudo-classes (:is(), :where(), :has()), and media queries are formatted with proper spacing.