1CC0

1CC0 is not a formal license in itself; in many contexts it is an informal shorthand used to refer to CC0 1.0 Universal (Public Domain Dedication). The term “1CC0” is not an official designation of the Creative Commons framework, and standard references to CC0 use the full name “CC0 1.0 Universal.”

CC0 1.0 Universal is a public domain dedication intended to relinquish all rights to a work to the extent allowed by law. When a creator applies CC0, others may copy, modify, distribute, perform, and use the work for any purpose, including commercial uses, without seeking permission. Attribution is not required by the license, though giving credit remains a common courtesy in many communities and platforms.

The license works worldwide, but it cannot override rights that cannot be waived in certain jurisdictions, such as some moral rights or rights related to publicity and trademarks. It does not apply to rights outside the creator’s control, such as third-party materials embedded in a work without permission. CC0 also does not guarantee that a work is free of claims or that it is safe to use in all contexts; it simply aims to place the work as close to the public domain as possible.

To apply CC0, a creator typically includes the official CC0 text or deed in the work’s repository or accompanying files, labeling it as CC0 1.0 Universal (Public Domain Dedication). This provides a clear statement of intent to relinquish rights to the extent permitted by law. See also Creative Commons licenses, public domain, and moral rights.