Compress & Optimize Images Easily with ImageOptim for Mac OS X
If you’re concerned about the file size of images you should grab ImageOptim, a free image compression tool that is drag & drop simple. Store the app in the Dock and toss a single picture or group of images onto the app and they will immediately be compressed without reducing much image quality by finding optimum compression parameters and stripping color profile information and other metadata from the files.
On average the image size savings are about 15-35%, making it a very useful tool for web designers, developers, publishers, bloggers, app developers, or anyone else that wants to reduce image file size and bandwidth requirements. ImageOptim works great for PNG, JPEG, and even GIF animation.
For command line users, use the “open” command to pass wildcards to ImageOptim for easy scripting and bulk image compression like so:
open -a ImageOptim.app ~/Pictures/SaveToWeb/*.jpg
There is also a separate system service available to download that lets you right-click on images to compress them directly from the OS X Finder.