1. NAME▲

pngquant - PNG image optimising utility

2. SYNOPSIS ▲

pngquant "[ options ] <ncolors> [pngfile [pngfile ...]]"

pngquant "[ options ] -map mapfile [pngfile [pngfile ...]]"

Note that it's required to specify the number of colors (<ncolors>) or the mapfile. Arguments in square brackets are optional.

3. DESCRIPTION ▲

This manual page documents briefly the

pngquant command.

pngquant quantizes one or more 32-bit RGBA PNGs to 8-bit (or smaller) RGBA-palette PNGs using either ordered dithering or Floyd-Steinberg diffusion dithering (default). The output filename is the same as the input name except that it ends in -fs8.png or -or8.png (unless the input is stdin, in which case the quantized image will go to stdout). The default behavior if the output file exists is to skip the conversion; use -force to overwrite.

4. OPTIONS ▲

-force

    Overwrite existing output files.

-ordened, -nofloyd, -nofs

    Use ordered dithering.

-verbose, -noquiet

    Print status messages.

NOTE:

    the -map option is NOT YET SUPPORTED.

5. EXAMPLE ▲

Creating a new image with the number of colors reduced to 64:

  • pngquant 64 image.png
  • The resulting image will have 64 colors and will be saved as image-fs8.png.
        .SH AUTHOR pngquant was written by Greg Roelofs <>.

This manual page was written by Nelson A. de Oliveira <>, for the Debian project (but may be used by others).