pngcrush

Optimize PNG

$ pngcrush [input.png] [output.png]

$ pngcrush -ow [image.png]

$ pngcrush -rem alla [input.png] [output.png]

$ pngcrush -brute [input.png] [output.png]

$ pngcrush -reduce [input.png] [output.png]

pngcrush [options] input [output]

pngcrush optimizes PNG files by testing multiple compression strategies and selecting the smallest result. The optimization is completely lossless - the image data is preserved exactly while reducing file size through better compression parameters.
The -brute option tries all filter and compression combinations for maximum reduction at the cost of processing time. The -rem option strips metadata chunks like text comments, timestamps, and color profiles to further reduce size.

INPUT

Input PNG file.

Output PNG file.

Overwrite input.

Remove chunk.

Brute force optimization.

Reduce color depth.

Lossless optimization. Processing time varies.

pngcrush was created for PNG file size optimization.

optipng(1), pngcheck(1), pngquant(1)