All photos published on Piix can be used for free. You can use them for commercial and noncommercial purposes. You do not need to ask permission from or provide credit to the photographer or Piix, although it is appreciated when possible.

More precisely, piix grants you an irrevocable, nonexclusive, worldwide copyright license to download, copy, modify, distribute, perform, and use photos from Piix for free, including for commercial purposes, without permission from or attributing the photographer or Piix.