It is a free & web-based application, from the makers of popular Preloaders.net, that enables you to customize various popular icon sets online.

Iconizer allows you to select an icon from a list of well-categorized icon sets and:

• select the foreground/background color
• size of it
• file type to be created
• add an animation
• resize it & more..

Although the application is very useful, what would be even better is “selecting the whole icon set” & ability to customizing it in bulk.