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pngcrush

Mark invoked the lazy web earlier today in a bid to find a good way of bulk optimizing PNG files. Several people recommended pngcrush in the comments and it sounds like a fantastically useful piece of software—apparently it can run 114 different lossless compression methods on an image and automatically chose the most efficient one.

Posted 8th February 2003 at 11:57 pm

This is pngcrush by Simon Willison, posted on 8th February 2003.

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2 comments

It's also mostly useless, since it does no better (Well, perhaps twenty bytes) than most software's inbuilt PNG compression. png is fun, because once you get to small images (web-based, for example), it takes less space to save as full colour, because then it doesn't have to save pallete info...
Aquarion - 9th February 2003 13:19 - #
clearly you've never used pngcrush on photoshop output. i've gotten anywhere from a few to 20% further compression by using pngcrush on what photoshop tries to pass off as png output.
jim winstead - 15th February 2003 04:39 - #

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