Image Optimization like TinyPNG [closed]

I have searched for a good Mass Image Optimizer over Google to use on Windows or by PHP to optimize the Images of a Folder but none of them where so good like TinyPNG. Most of them raised the size instead to shrink. Google Pagespeed Insight likes the Sizes of TinyPNG but nothing compareable found.

Any advice I can use?

Does TinyPNG reduce quality?

TinyPNG helps you make PNG files smaller so that the web pages you use them on load faster. It does this by optimizing them; it's a lossy process, but I personally can't see any degradation in image quality. It reduces the number of colors and removes unnecessary metadata.

TinyPNG uses this library: http://pngquant.org/

Available on Windows, Linux and Mac.