Whether you're an author designing your own DIY book cover or a graphic designer on a tight budget designing an ebook cover for someone else it is always best to make sure that any image, vector, or illustration you get online is commercial free, and won't violate any copyrights or else you might get you sued for thousands of dollars.

If you are looking for the best websites to use commercial use stock images, vectors, or illustrations on your book cover designs for free then keep on reading. I'll also show you examples of book covers created with images from each specific site. 

This is a psychological thriller I was inspired to design after reading a seriously twisted story that left me on the edge so I collected my thoughts, hoped on photoshop, and whipped this up:

Amazing HD stock image websites, and a vector website that visual artists, as well as graphic designers, can use while on a tight budget.

Pixabay:

Pixabay has a massive HD stock image library that you can use on both personal, and commercial projects without giving attribution. All you have to do is create an account and viola! Unlimited access to download any stock image they have in their database.