gulp-html-postcss is a Gulp plugin that processes HTML files with PostCSS. It's ideal for automating HTML modifications like optimizing CSS in <style> tags, adding vendor prefixes, or even integrating with linters. This plugin seamlessly integrates PostCSS's powerful capabilities directly into your Gulp workflow, enabling efficient and consistent HTML processing during your build process. It allows you to manage your HTML as part of your broader build workflow, keeping your assets tidy.