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npm · #1992 most downloaded on npm
Merge CSS rules with PostCSS.
Last release today
17 Sep 2026
Release timing varies
gaps range from 8 days to 4 months
Most releases are documented
notes for 49 of the last 60 stable releases
Nothing withdrawn
no release was ever pulled
11 years old
96 releases · first in 2015
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One column per quarter.
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Fixes an issue where options were not passed to normalize-url.
Allow postcss-font-family to be disabled.
postcss-font-family to be disabled.Nothing published for this version
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cssnano can now be consumed with the parentheses-less method in PostCSS; e.g. postcss([ cssnano ]).
postcss([ cssnano ]).Extract trbl value reducing into a separate module.
ch units; previously they were removed.Add postcss-plugin keyword to package.json.
postcss-plugin keyword to package.json.Adds removal of outdated vendor prefixes based on browser support.
cssnano.process(css, opts) instead of cssnano(css, opts).Nothing published for this version
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Fixes incorrect minification of border:none to border:0 0.
border:none to border:0 0.Improved selector minifying logic, leading to better compression of attribute selectors.
Fixes crash on undefined decl.before from prior AST.
decl.before from prior AST.Added support for bundling cssnano using webpack (thanks to @MoOx).
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Fixed a bug where a CSS function keyword inside its value would throw an error.
Better support for merging properties without the existance of a shorthand override.
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Now can merge identifiers such as @keyframes and @counter-style if they have duplicated properties but are named differently.
@keyframes and @counter-style if they
have duplicated properties but are named differently.Nothing published for this version
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