Our licenses help authors keep and manage their copyright on terms they choose. Our public domain tools, on the other hand, enable authors and copyright owners who want to dedicate their works to the worldwide public domain to do so, and facilitate the labeling and discovery of works that are already free of known copyright restrictions.
CC0
Use this universal tool if you are a holder of copyright or database rights, and you wish to waive all your interests that may exist in your work worldwide. Because copyright laws differ around the world, you may use this tool even though you may not have copyright in your jurisdiction, but want to be sure to eliminate any copyrights you may have in other jurisdictions.
Public Domain Mark
Use this tool if you have identified a work that is free of known copyright restrictions. Creative Commons does not recommend this tool for works that are restricted by copyright laws in one or more jurisdictions.