If you share images on the web, via email or any other means, help yourself and your audience out by running PNG, JPEG or GIF files through ImageOptim first.
ImageOptim, as the name implies, optimises images by processing them with a number of open source tools. I’ve often seen file size reductions of 20-30%. A saving not to be sniffed at when in comes to disk space and load times.
As well as single files, the application can batch process multiple files or whole folders of images. And you can also install the system service to run directly from Finder’s contextual menu or invoke via keyboard shortcut.
