As Petie points out, even a client-side zip handler still requires grabbing the zip just to look at, defeating the purpose of such a tool that would involve plenty of coding and no real advantage.
With my site, I have zip files that have thousands of image files (some as high as 3,000+), requiring a decent-size sample image to show off what is hiding in the zip. Often the sample image has several dozen to show off what is hiding in the folder, but with most of them being button-size (120-160 x 40-100 range), that is a very possible thing to do. On this site, given the .zip files are (based on my impression) for massive images, this would not be practical.
Really, I doubt there is a good option for this other than just grabbing the .zip and looking through it yourself. :/
With my site, I have zip files that have thousands of image files (some as high as 3,000+), requiring a decent-size sample image to show off what is hiding in the zip. Often the sample image has several dozen to show off what is hiding in the folder, but with most of them being button-size (120-160 x 40-100 range), that is a very possible thing to do. On this site, given the .zip files are (based on my impression) for massive images, this would not be practical.
Really, I doubt there is a good option for this other than just grabbing the .zip and looking through it yourself. :/