What exactly is fair use?

Fair use is the right to make some use of copyrighted material without getting permission or paying. It is a basic limit on copyright law that protects free expression. “Fair use” is an American phrase, although all copyright laws have some limits that keep copyright from being private censorship.

Fair use favors uses that (1) are noncommercial and not sold for a profit; (2) are transformative, adding new meaning and messages to the original; (3) are limited, not copying the entirety of the original; and (4) do not substitute for the original work. None of these factors is absolutely necessary for fair use, but they all help, and we believe that fanworks like those in the archive easily qualify as fair uses based on all these factors.