PNG optimisation tools

Question

A while back I used a PNG optimisation service called (I think) \"smush it\". You fed it a weblink and it returned a zip of all the PNG images with their filesizes nicely, w

Answer 1

Execute with PHP this command line tools

  pngcrush -rem gAMA -rem cHRM -rem iCCP -rem sRGB -brute -l 9 -max -reduce -m 0 -q IMAGE
  optipng -o7 -q pngout.png
  pngout pngout.png -q -y -k0 -s0
  advpng -z -4 pngout.png > /dev/null

• pngcrush
• OptiPNG
• pngout
• advpng