CSS Formatter beautifies and minifies CSS stylesheets with support for nested rules, media queries, @supports, @keyframes, and CSS custom properties (variables). It handles vendor-prefixed properties, calc() expressions, and modern CSS features like container queries and cascade layers. The formatter preserves important comments (/*! */) during minification and sorts properties alphabetically when enabled.
Frontend developers debugging stylesheet issues, CSS architects standardizing code style, and build engineers optimizing CSS for production delivery. The tool runs entirely in your browser — your data never leaves your device.
Learn more about related topics: CSS Modules, PostCSS, Sass, CSS custom properties.
CSS Formatter is a free, browser-based developer tool on AIDToolStack. Format, beautify, and minify CSS with indent options. It requires no installation or sign-up and works entirely in your browser.
Yes, completely free. CSS Formatter has no usage limits, no account requirements, and no hidden fees. Use it as often as you need.
No, all processing happens locally in your browser. Your data never leaves your device and nothing is sent to any server.
Yes, it works in any modern browser on both desktop and mobile devices. No app download required — just open the page and start using it.
AIDToolStack tools run entirely in your browser with no server processing. This means faster results, complete privacy, and zero downtime. There are no ads blocking your workflow, and everything is free with no sign-up required.
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