PostCSS is a powerful tool for transforming CSS with JavaScript. It functions as a CSS parser and provides an API to analyze and manipulate the resulting abstract syntax tree (AST). With its plugin ecosystem, PostCSS enables diverse tasks, from linting and autoprefixing to future CSS syntax implementations. Enhance your CSS workflow with PostCSS and its flexible plugin architecture.
PostCSS releases have been frequent, especially between 2014-2017 and 2020-2021, with multiple versions appearing monthly. The package saw a high release volume in 2014 (versions 0.1.0 to 4.0.0), 2015 (versions 4.0.1 to 5.0.13) and again in 2020 (versions 7.0.27 to 8.2.2). The frequency decreased after 2021. In 2025, there were only 5 releases through August (versions 8.5.0 to 8.5.6).
PostCSS downloads show a general upward trend from March 2024 to August 2025, peaking in July 2025 at 473 million. The package experienced significant growth in the first half of 2025. September 2025 downloads are incomplete, showing only 92 million so far.
