ImageOptim — make websites and apps load faster (Mac app) ImageOptim — better Save For Web Color quantizer Download Color quantizer is a simple-to-use software application that provides a friendly environment and intuitive options for adjusting all colors in images. Although it primarily caters to advanced users, it shouldn't be too difficult to figure out by novices. Installation is not a prerequisite, which makes Color quantizer portable. You can drop the executable file to a custom directory on the hard disk and just click it to run. It is also possible to save the app to a USB flash disk or similar storage unit, in order to run it on any machine rapidly. What's important is that the tool does not create new entries in the Windows registry, nor copy additional files to your system without your consent. The interface is based on a regular window with a familiar structure, where you can import images using either the file browser or drag-and-drop feature. When hovering the mouse you can view the respective image section zoomed in.