Creative Commons licenses are a set of standardized public copyright licenses that let a creator grant everyone advance permission to use their work under specific conditions, replacing copyright’s default “all rights reserved” with a flexible “some rights reserved.” The current suite is version 4.0, released in 2013, and it contains six licenses built from four simple conditions, plus two separate tools for placing work in the public domain.
The Four Conditions Behind Every License
Every standard Creative Commons license is assembled from some combination of four conditions. Learn these four and you can decode any CC license on sight.
- Attribution (BY): You must credit the original creator. This appears in every standard CC license.
- ShareAlike (SA): If you remix or build on the work, you must release your version under the same or a compatible license.
- NonCommercial (NC): You may only use the work for purposes not primarily aimed at commercial advantage or monetary compensation.
- NoDerivatives (ND): You may share the work in its original form but not distribute a modified or remixed version.
One principle sits above all four: CC licenses never reduce your existing rights under copyright exceptions like fair use. If your use of a CC-licensed work already qualifies as fair use, the license conditions don’t apply to you at all.1Creative Commons. Frequently Asked Questions
The Six Standard Licenses
Those four conditions combine into six licenses, arranged here from most to least permissive.2Creative Commons. About the CC Licenses
- CC BY: The most open. Anyone may copy, redistribute, remix, and build on the work for any purpose, including commercial use, as long as they credit you.
- CC BY-SA: Same freedoms as CC BY, but adaptations must carry the same or a compatible license, keeping the work and everything derived from it open.
- CC BY-NC: Others may remix and share for noncommercial purposes with credit. New versions don’t have to use the same license.
- CC BY-NC-SA: Noncommercial remixing and sharing with credit, and adaptations must carry identical terms. Common in education.
- CC BY-ND: Others may copy and redistribute the work, even commercially, but only in its original unmodified form, with credit.
- CC BY-NC-ND: The most restrictive. Others may download and share the original with credit, but cannot modify it or use it commercially.
All six work well for creative and educational content. Creative Commons recommends against using them for software, where dedicated open-source licenses like the GPL or MIT license are a better fit.3Creative Commons. Considerations for Licensors and Licensees
The Two Public Domain Tools
Alongside the six licenses, Creative Commons offers two tools for work that carries no restrictions at all.
CC0 (Creative Commons Zero) is a legal waiver. You voluntarily surrender all copyright and related rights to the fullest extent the law allows, placing the work into the public domain. There are no conditions of any kind. No attribution required, no restrictions on commercial use.4Creative Commons. CC0 1.0 Universal Legal Code
The Public Domain Mark serves a different purpose. It labels work that is already free of known copyright restrictions, usually because copyright has expired. Museums and libraries use it to tag historical documents, ancient texts, and similar material. Neither tool is a license. Both simply confirm that the public may use the work without asking.
How Attribution Actually Works
Attribution is required under every standard CC license, so getting it right matters. Creative Commons recommends four elements, easily remembered by the acronym TASL:5Creative Commons. Recommended Practices for Attribution
- Title of the work, if one was provided.
- Author, or whatever name or entity the creator designated for credit.
- Source, meaning a link back to where the original lives.
- License, named and linked (for example, “CC BY 4.0”).
Under version 4.0, you can present these in any manner “reasonable to the means, medium, and context” of your use. A blog post might place a text credit under an image; a podcast might list the credit in show notes. If you modified the work, you also need to note that changes were made.6Creative Commons. Attribution 4.0 International
One detail catches people off guard. Under version 4.0, a creator can ask you to remove attribution from your work, and you have to comply. This sometimes happens when a creator doesn’t want their name attached to a particular adaptation.
What “NonCommercial” Actually Means
The NonCommercial condition causes more confusion than any other part of the system. The official definition turns on intent: a use is commercial if it is “primarily intended for or directed towards commercial advantage or monetary compensation.” That word “primarily” carries a lot of weight, because almost no activity is completely disconnected from money.
Creative Commons deliberately kept the definition flexible rather than trying to list every permitted and prohibited activity. Two things are clear from the official guidance. The definition looks at the purpose of the use, not the identity of the user. A nonprofit can violate the NC condition if a particular use is primarily commercial, and a for-profit company can comply if the use itself isn’t primarily aimed at revenue.7Creative Commons. NonCommercial Interpretation
Disputes over this definition are rare in practice, but gray areas exist. When you need certainty about a specific use, the safest step is to contact the creator and ask. Some licensors post their own interpretations of what they consider commercial, but those personal explanations are not legally part of the CC license.
What Happens If Someone Breaks the License
Using a CC-licensed work outside its terms, such as selling a NonCommercial-licensed photo or stripping attribution, automatically terminates your rights under the license. What happens next depends on which version applies.
Under pre-4.0 licenses, termination was immediate and permanent. You lost your rights the moment you violated the terms, and the only way to get them back was to ask the creator directly.8Creative Commons. Statement of Enforcement Principles
Version 4.0 added a much more forgiving mechanism. If you fix the violation within 30 days of discovering it, your rights reinstate automatically, with no need to contact the creator.9Creative Commons. Attribution 4.0 International Legal Code Even after the 30-day window, the creator can choose to reinstate your rights expressly. This cure period is one of the most practical improvements in the 4.0 suite. Honest mistakes, like a missing attribution line after a website redesign, no longer cut off your access forever.
Reinstatement doesn’t erase the violation itself. The creator still has the right to seek remedies for the period when the license was breached.9Creative Commons. Attribution 4.0 International Legal Code
CC Licenses Are Permanent
This is the point that surprises creators most. Once you release a work under a Creative Commons license, you cannot take it back. CC licenses are irrevocable. You can stop offering the work under a CC license going forward, but anyone who already received it keeps the right to use it under the original terms.1Creative Commons. Frequently Asked Questions
The license runs for the full duration of the underlying copyright. When copyright expires, the work enters the public domain and the license becomes moot. If a work contains multiple copyrighted elements with different expiration dates, such as a song with separately copyrighted lyrics and melody, the license only reaches the elements still under copyright.1Creative Commons. Frequently Asked Questions
Because of this irrevocability, choosing a license deserves careful thought. If there’s any chance you’ll want to restrict future use, a more restrictive license, or no CC license at all, is the safer choice.
Choosing and Applying a License
Before choosing, confirm you actually have authority to grant permissions. Usually this means you’re the original author, but if the work was made for an employer or involves a publisher’s rights, you may need permission from the rights holder first.
The decision itself comes down to three questions:
- Do you want to allow commercial use? If not, pick a license with the NC condition.
- Do you want to allow adaptations? If not, pick a license with the ND condition.
- If you allow adaptations, must they carry the same license? If yes, pick a license with the SA condition.
The Creative Commons Chooser tool walks through these questions and generates the license information you need. For a website, it produces an HTML snippet you can embed. The machine-readable code lets search engines identify the license and helps tools like Google’s usage-rights filter surface your work to people looking for reusable content.10Creative Commons. Marking Your Work With a CC License For offline work such as PDFs, printed books, or physical art, include a text notice identifying the work, the creator, and a link to the full license deed.
What CC Licenses Do Not Cover
CC licenses only reach copyright and, in version 4.0, sui generis database rights. Patent and trademark rights are explicitly excluded, including under CC0. If a work is covered by a patent or contains a protected trademark, the CC license gives no one permission to use those elements. Moral rights are also not licensed, though in version 4.0 the creator agrees not to assert them to the extent needed for licensees to exercise their rights.9Creative Commons. Attribution 4.0 International Legal Code
The same limit applies when your work includes material you didn’t create, such as a stock photo, a quoted passage, or a third-party illustration. You cannot license that material under your CC license unless you actually hold the rights. You need to mark clearly which parts your CC license does not cover, both with a general notice (something like “Except where otherwise noted, this work is available under CC BY 4.0”) and with specific labels on each excluded element.11Creative Commons. Marking Third Party Content Skipping this step is one of the most common creator mistakes, and it creates real legal risk for anyone who reuses your work assuming everything is covered.