PurgeCSS is available via a CLI. You can use the CLI by itself or with a configuration file.


npm i -g purgecss


To see the available options for the CLI: purgecss --help

purgecss --css <css> --content <content> [option]

  --con, --content  glob of content files                                [array]
  -c, --config      configuration file                                  [string]
  -o, --out         Filepath directory to write purified css files to   [string]
  -w, --whitelist   List of classes that should not be removed
                                                           [array] [default: []]
  -h, --help        Show help                                          [boolean]
  -v, --version     Show version number                                [boolean]

The options available through the CLI are similar to the ones available with a configuration file. You can also use the CLI with a configuration file.


purgecss --css css/app.css css/palette.css --content src/index.html


You can specify content that should be analyzed by PurgeCSS with an array of filenames or globs. These files can be HTML, Pug, Blade, etc.

purgecss --css css/app.css --content src/index.html src/**/*.js


You can use the CLI with a configuration file. Use --config or -c with the path to the config file.

purgecss --config ./purgecss.config.js


By default, the CLI outputs the result in the console. If you wish to return the CSS as files, specify the directory to write the purified CSS files to.

purgecss --css css/app.css --content src/index.html src/**/*.js --out build/css/


If you wish to prevent PurgeCSS from removing a specific CSS selector, you can whitelist it.

purgecss --css css/app.css --content src/index.html --whitelist classnameToWhitelist


You can see an example here.

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