The pngcrush command line utility as a readable/writable stream. This is handy for situations where you don't want to worry about writing the input to disc and reading the output afterwards.
The constructor optionally takes an array of command line options for
var PngCrush =myCrusher = '-res' 300 '-rle';sourceStream;
PngCrush as a web service (removes all ancillary chunks and does brute force compression):
var PngCrush =http = ;http;
Make sure you have node.js and npm installed, and that the
pngcrush binary is in your PATH, then run:
npm install pngcrush
3-clause BSD license -- see the
LICENSE file for details.