Lazy Ubuntu

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@lazyubuntu {0} 



  
~/ ls -lsh desktop.png 
  260K -rw-r–r– 1 toor toor 258K 2008-07-22 07:43 desktop.png


toor@lazyubuntu {0} 


  
~/ optipng desktop.png 
  OptiPNG 0.6: Advanced PNG optimizer.
  Copyright (C) 2001-2008 Cosmin Truta.


** Processing: desktop.png
1440×900 pixels, 3×8 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@lazyubuntu {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