Stu Robson's ReliCSS (clever name!) tool can excavate outdated CSS in your codebase that have modern CSS solutions.

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ReliCSS is a tool that identifies outdated CSS code in your projects and suggests modern alternatives. It categorizes legacy code by severity: high (IE6/7 hacks, dangerous techniques), medium (IE8-10 hacks), and low (vendor prefixes better handled by Autoprefixer). The tool helps developers clean up technical debt like unnecessary !important declarations, checkbox hacks replaceable by :has(), and old vendor prefixes from outdated build configurations.

<p>This is great. Thanks CSS-Tricks!</p>


<p>Now this is innovative. Super cool!</p>
