# Sass > Converts SCSS or Sass files to CSS > .scss and .sass can be used interchangeably in below examples depending on your preference - Output converted file to stdout `sass {{inputfile.(scss|sass)}}` - Immediately convert SCSS or Sass file to CSS to specified output file `sass {{inputfile.(scss|sass)}} {{outputfile.css}}` - Watch SCSS or Sass file for changes and output or update CSS file with same filename `sass --watch {{inputfile.(scss|sass)}}` - Watch SCSS or Sass file for changes and output or update CSS file with specified filename `sass --watch {{inputfile.(scss|sass)}}:{{outputfile.css}}`