What is CSS?
CSS (Cascading Style Sheets) is the language used to control the appearance of web pages — colors, fonts, spacing, layout, and more. CSS rules consist of selectors (which elements to style) and declarations (what styles to apply).
When CSS is deployed to production, it’s often minified — all whitespace and comments stripped out — to reduce file size and improve page load speed. The resulting code is efficient but completely unreadable. Conversely, when CSS is written loosely or copy-pasted from multiple sources, it may be inconsistently formatted, making it hard to navigate and maintain.
What Does This Tool Do?
This tool either beautifies CSS (adds consistent indentation, line breaks, and spacing) or minifies it (removes all unnecessary whitespace to produce a compact, production-ready file). Choose the mode that fits your current task.
How to Use This Tool
- Paste your CSS into the input area.
- Choose Beautify or Minify mode.
- The result appears immediately.
- Copy the output with the copy button.
Common Use Cases
- Debugging styles: Format minified CSS from a third-party library or bundle to understand and edit it.
- Code review: Beautify CSS before reviewing it in a pull request.
- Production optimization: Minify hand-written CSS to reduce file size before deployment.
- Consistency: Normalize CSS copied from different sources into a uniform style.
Frequently Asked Questions
Does minifying CSS change how it works?
No. Minification only removes whitespace, comments, and unnecessary characters — it doesn’t change the CSS rules themselves. The browser renders minified and beautified CSS identically.
Are CSS variables and modern syntax supported?
Yes. The formatter handles custom properties (--var-name), @media queries, @keyframes, pseudo-selectors, and other modern CSS features.
Is my data private?
Yes. All formatting runs locally in your browser — nothing is sent to any server.