The images are either in public domain, or licensed under free linceses: GPL, Creative Commons, Free-Art license or Free-Photos.biz license. You can also use a search bar at the bottom to look for photos by keywords. In order to download a photo in full size you have to register and login (even if you are not going to join as a member). Please note that the use of images of persons may be restricted by laws regarding personality rights. Personality rights restrictions apply independently of the image license.
While the copyright and licensing information supplied for each photo is believed to be accurate, Free-Photos.biz does not provide any warranty regarding the copyright status or correctness of licensing terms. If you decide to reuse the images from Free-Photos.biz, you should verify the copyright status of each image just as you would when obtaining images from other sources.