ImageAlpha is a free and simple to use Mac app for converting 24-bit PNG to paletted 8-bit with full alpha channel. This greatly reduces file sizes with only minor loss of quality. Such images are compatible with all browsers, and even degrade well in IE6.
ImageAlpha can achieve conversion quality better than MacromediaAdobe Fireworks by employing improved pngquant, pngnq.
Even images that need more than 256 colors can be made more compressible using special alpha-channel-aware posterizer.
· 64bit processor
What's New in This Release: [ read full changelog ]
· Fixed corruption of transparent pixels in median cut mode
· Added color profile support in posterizer
· Upgraded to pngquant 1.8.2
· Droppped support for Snow Leopard and 32-bit CPUs (sorry, Apple makes backwards compatibility annoyingly difficult)