Convert two value syntax for repeat-style into one value.
Minify at-rule params with PostCSS
Normalize CSS animation/transition timing functions.
Use the :focus-visible pseudo-selector in CSS
Trim whitespace inside and around CSS rules & declarations.
Reduce transform functions with PostCSS.
Normalize keyword values for position into length values.
PostCSS plugin to transform percentage-based opacity values to more compatible floating-point values.
Nest rules inside each other in CSS
Normalize URLs with PostCSS
Use the :focus-within pseudo-selector in CSS
PostCSS plugin to transform :not() W3C CSS level 4 pseudo class to :not() CSS level 3 selectors
Merge longhand properties into shorthand with PostCSS.
Ensure CSS selectors are unique.
Use the :any-link pseudo-class in CSS
Use unquoted format on @font-face CSS definitions.
Use the rebeccapurple color keyword in CSS
Use two values display syntax for inner and outer display types.
SCSS parser for PostCSS
Use a place-* shorthand for align-* and justify-* in CSS
Use Custom Selectors in CSS
Discard duplicate rules in your CSS files with PostCSS.
Use the ic length unit
Use the overflow shorthand in CSS