Did you ever try to use Quick Look on a zip file? Yeah it doesn’t work. Luckily there is a outstanding free plugin that can take care of this minor but incredibly annoying problem.
Zip Quick Look makes it possible to view a zipped archieved file’s contents using Quick Look. To install Just download the plug-in, drag it to /Library/QuickLook/(Create one if you don’t have it) and then restart Finder (right-click Finder in the Dock while holding the Option key and select Relaunch). Now when you Quick Look a zipped archive you should see the file’s contents.
Before and after installing Zip Quick Look:

