Best Free Online CSS Formatter

Minified or poorly formatted CSS — from build tool output, copied code snippets, or legacy codebases — makes it hard to understand the styles being applied, find specific rules, or make targeted edits. devtoolkit.sh's CSS Formatter parses and re-formats CSS to a clean, readable standard: one property per line with consistent indentation, space after colons, media query blocks properly nested and indented. It handles standard CSS, including custom properties (CSS variables), media queries, keyframe animations, pseudo-classes and pseudo-elements, and complex selectors. The formatter also supports minification in reverse — if you want to produce compact output for a stylesheet you've edited by hand, select the minify option. All processing runs in your browser. The tool works equally well with small component-level styles and large framework stylesheets. It's a go-to utility when reading third-party stylesheets included in a project, auditing legacy CSS for redundancies, or understanding the structure of styles injected by browser extensions or embeds.