This utility might not be maintained much anymore, if at all. You might be interested in trying my ImageWorsener utility, instead.

Advantages of ImageWorsener over pngrewrite:


Pngrewrite is command-line utility that reduces the unnecessarily large palettes that some programs write into PNG files. It also optimizes transparency data, and reduces the bits-per-pixel if possible. Handy for post-processing PNG files before putting them on a web site.

It can probably run on most any platform on which libpng can run. A Windows version is included. For other platforms, you'll have to compile it yourself.


License: zlib/libpng

Read the included readme.txt file for more details.

Version history: