CSS Formatter & Beautifier
Usage Guide
CSS Formatter helps you transform minified, compressed, or inconsistently written CSS stylesheets into clean, readable code — entirely in your browser with no data leaving your device. Modern front-end build pipelines often output minified CSS bundles that are unreadable to humans. When you need to debug a production stylesheet, understand a third-party component's styles, or simply tidy up hand-written CSS before a code review, this formatter does the heavy lifting. Paste any CSS — including standard stylesheets, SCSS-like nested rules, media queries, keyframe animations, custom properties, and vendor-prefixed declarations — and the tool instantly produces output with consistent indentation, each property on its own line, and each rule block clearly separated. You can also choose to minify CSS to strip all whitespace from a stylesheet, producing the smallest possible file for deployment. The real-time formatter processes even large stylesheets with hundreds of rules in milliseconds. This tool is particularly useful when working with generated CSS from preprocessors, design tools like Figma Dev Mode or Zeplin, or CSS-in-JS outputs that need to be inspected.
- Paste or upload CSS — Paste your CSS text directly into the input panel, or drag and drop a .css file onto the upload area. The content loads immediately without any page reload.
- Choose output style — Select "Beautify" to produce expanded CSS with each property on its own indented line, or "Minify" to collapse all whitespace and produce the most compact single-line output for production deployment.
- Adjust indentation — Use the indentation control to match your team's preferred style: 2 spaces, 4 spaces, or tabs. The selected style is preserved in the URL for easy sharing.
- Review the formatted output — The right panel shows the formatted CSS with each selector and declaration block clearly separated. Nested media queries and keyframe blocks are indented to reflect their structure.
- Copy to clipboard — Click "Copy" to copy the full formatted output to your clipboard. Paste directly into your code editor, stylesheet file, or design tool.
- Download the file — Click "Download" to save the formatted stylesheet as a .css file. Useful when you need to replace a minified file in a project with its readable counterpart for debugging.
Frequently Asked Questions
Is my CSS code sent to a server when I format it?
No. All CSS formatting runs entirely inside your browser. Your stylesheets are never transmitted to any server or stored outside your device.
Can I minify CSS to reduce file size?
Yes. Click the Minify button to compress your CSS into a single line with all whitespace and comments removed, ideal for production deployments.
Can I format CSS without an internet connection?
2Kit is a Progressive Web App (PWA). After your first visit the tool is cached and works fully offline.
Does the formatter support modern CSS features like custom properties?
Yes. The formatter uses js-beautify which handles standard CSS syntax including custom properties (variables), at-rules (@media, @keyframes), and selector nesting syntax.
Is this CSS formatter free?
2Kit is completely free, requires no account or registration, and has no usage limits.
Technical Implementation
All processing runs entirely in your browser — no data is ever sent to any server. This tool works fully offline as a Progressive Web App (PWA): after the first visit, all pages and assets are cached by a Service Worker and remain available without an internet connection. Your input data never leaves your device, making it safe for sensitive content including API keys, passwords, private configuration, and confidential documents.