PNG is a picture file format that stands for portable networks graphics. The purpose and creation of this file type was to be able to transfer images quickly and effeciently from the Internet. PNG files are not the same as GIF's because they support lossless data compression, specifically a 2-stage compression process. ICO files are another type of image file format that is designed to be used on Microsoft Windows operating systems. The different between ICO and PNG is ICO files contain one or more small images, sizes and color depths which can be scaled and look proportionate. Depending on what the user is looking for SDR Free PNG to ICO Converter will quickly convert png to ico file format.