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[ Source: pngquant  ]

Package: pngquant (1.0-4.1)

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PNG (Portable Network Graphics) image optimising utility

pngquant is a command-line conversion utility to quantize and dither truecolor PNG images, especially those with a full alpha channel, down to 8-bit (or smaller) RGBA-palette PNGs. Such images are usually two to four times smaller than the full 32-bit versions, and partial transparency is preserved quite nicely. This makes pngquant especially useful both for Web sites and for PlayStation 2 development, where one of the texture formats is RGBA-palette-based (though not PNG-compressed). This is the same technique used for many of the images on the Miscellaneous Transparent PNGs page (, and the results are often indistinguishable from the original, truecolor PNG images.

Optimizers (like pngcrush and optipng) optimize the compression, usually losslessly, while pngquant quantizes colors down to 256 (or fewer) distinct RGBA combinations, which is lossy.

Tags: Implemented in: C, User Interface: Command Line, Role: role::program, scope::utility, Purpose: Compressing, use::converting, works-with-format::png, Works with: Image, Raster Image

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Download pngquant

Download for all available architectures
Architecture Package Size Installed Size Files
amd64 19.0 kB67.0 kB [list of files]
armel 18.7 kB65.0 kB [list of files]
armhf 18.5 kB61.0 kB [list of files]
i386 18.0 kB65.0 kB [list of files]
ia64 24.3 kB51.0 kB [list of files]
kfreebsd-amd64 19.0 kB36.0 kB [list of files]
kfreebsd-i386 18.0 kB33.0 kB [list of files]
mips 18.3 kB65.0 kB [list of files]
mipsel 18.3 kB65.0 kB [list of files]
powerpc 18.4 kB65.0 kB [list of files]
s390 19.5 kB67.0 kB [list of files]
s390x 20.5 kB74.0 kB [list of files]
sparc 18.3 kB63.0 kB [list of files]