node-pngquant

The pngquant command line utility as a readable/writable stream.

The constructor optionally takes an array of command line options for the pngquant binary (defaults to [256]):

importPngQuantfrom'pngquant';constmyPngQuanter=newPngQuant([192,'--quality','60-80','--nofs','-']);sourceStream.pipe(myPngQuanter).pipe(destinationStream);

PngQuant as a web service (sends back a png with the number of colors quantized to 128):

importPngQuantfrom'pngquant';importhttpfrom'http';http.createServer(function(req,res){if(req.headers['content-type']==='image/png'){res.writeHead(200,{'Content-Type': 'image/png'});req.pipe(newPngQuant([128])).pipe(res);}else{res.writeHead(400);res.end('Feed me a PNG!');}}).listen(1337);

Installation

Make sure you have node.js and npm installed, and that the pngquant binary is in your PATH, then run:

npm install pngquant

Releases

See the changelog.

License

3-clause BSD license -- see the LICENSE file for details.