IconMasterXP is a versatile PNG/BMP/JPG/* to .ICO converter. Converts both-ways, fully supports alpha transparency mask (also known as PNG mask), can create multi-paged icons, has an easy to use batch-processing interface and supports Windows® Vista/7/8 icon format. There is a whole set of special effects such as gamma, light, color balance. It can do geometric operations with supersampling (rotate/resize) which you can use without breaking your alpha mask. Besides 32-bit images, other types are supported (24, 8, 4 and 1 bpp) with editable palette. It is designed for anyone who works with .ICO files from software developers to digital graphic designers. Besides .ICO format, it can export and import images in 11 other image formats.
Due to its speed and versatility it is actually very convenient for batch-processing large photos and other everyday graphics, unrelated to icon format. You can do basic retouching via gamma, coloring and light/contrast filters along with resampling (resize/rotate with supersampling) to quickly edit a batch of graphics and convert between twelve different formats. All the filtering effects also affect alpha transparency mask so for example blur filter won't destroy the alpha channel on your PNG/ICO images.
Converts both-ways, fully supports alpha transparency mask (in PNG and ICO formats), can create multi-paged icons and has easy to use batch-processing interface. It supports changing bit-depth format of images, you can create an icon that supports all bpp formats. Very few (or no) converters out there support ICO and PNG alpha transparency mask and bit-depth like this one does. It is a very fast and small app but saves a lot of time due to its batch processing capabilities.
This software is designed for digital graphic designers along with web/software developers who often work with PNG and ICO images and need a quick tool that can convert/process their graphics.