For a demo project I had at work recently, I wanted to incorporate some imagery from the client’s web site. I discovered their web server was configured to generate an index page for the directory containing their images, but I didn’t want to click through each one individually to figure out if it was what I wanted. (An auto-generated index page is something like this, but imagine it having hundreds of entries.)
If it works (tested in Chromium 47 and Firefox 43), you should be presented with a little gallery of images! You can also search the web for
index of jpg or something similar and test it out there, but you can stumble across some…interesting…things that way. You’ve been warned.