PhoroLinux

Optipng is a command-line tool. With Optipng, you can optimize PNG file size.

Installation

• Debian/Ubuntu: $ sudo apt-get install optipng
• Fedora: # yum install optipng
• Archlinux: # pacman -S optipng

Usage

That’s easy. For example, you can run:

optipng desktop.png

Output:

toor@phorolinux {0}
> ~/ ls -lsh desktop.png
260K -rw-r--r-- 1 toor toor 258K 2008-07-22 07:43 desktop.png

toor@phorolinux {0}
> ~/ optipng desktop.png
OptiPNG 0.6: Advanced PNG optimizer.
Copyright (C) 2001-2008 Cosmin Truta.

** Processing: desktop.png
1440x900 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 262724 bytes
Input file size = 263180 bytes
Trying...
  zc = 9  zm = 8  zs = 0  f = 0		IDAT too big
  zc = 9  zm = 8  zs = 1  f = 0		IDAT too big
  zc = 1  zm = 8  zs = 2  f = 0		IDAT too big
  zc = 9  zm = 8  zs = 3  f = 0		IDAT too big
  zc = 9  zm = 8  zs = 0  f = 5		IDAT size = 182008
  zc = 9  zm = 8  zs = 1  f = 5		IDAT size = 181295
  zc = 1  zm = 8  zs = 2  f = 5		IDAT too big
  zc = 9  zm = 8  zs = 3  f = 5		IDAT too big

Selecting parameters:
  zc = 9  zm = 8  zs = 1  f = 5		IDAT size = 181295

Output IDAT size = 181295 bytes (81429 bytes decrease)
Output file size = 181367 bytes (81813 bytes = 31.09% decrease)

toor@phorolinux {0}
> ~/ ls -lsh desktop.png
180K -rw-r--r-- 1 toor toor 178K 2008-07-22 07:43 desktop.png

For more information, you can run man optipng.

Optipng