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 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 ▲
Overwrite existing output files.
-ordened, -nofloyd, -nofs
Use ordered dithering.
Print status messages.
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).