From here you may upload a single JPEG image, or a ZIP archive containing many JPG images.

Clearly describe who you are, what you are uploading, and why.
 

How to create a zip file of multiple images

On Windows XP, Windows Vista, and newer...

Add your jpg images to a folder, then right click on the folder and select "Send to > Compressed (zipped) folder". You will end up with both the original and a zipped copy.

On a Mac...

Add your jpg images to a file, then just CTRL-click on the file and select "Create Archive". You will also find the option in the File menu. Either way, you will end up with both the original and a zipped archive copy.