Technical and legal details

A Creative Commons license is a standardised copyright contract that operates on top of copyright law, not a replacement for it. The creator retains copyright while granting the public specified permissions in advance. This page routes you to the exact guide you need by what you are trying to do. It anchors every answer in version 4.0 legal text, identifies jurisdiction-sensitive limits, and defines every term before using it. Start here for the technical and legal details that govern every CC-licensed work.

• Core Rule: A CC license grants worldwide, royalty-free, non-exclusive, irrevocable permission for the term of the licensed copyright and similar rights, subject to conditions set by the license version and the chosen license.
• License Version: Use version 4.0 for a new license unless a specific, informed reason requires an older version or a jurisdiction-specific port. The 4.0 International licenses are designed without ports.
• Official Source: The exact license terms are the legal code at the Creative Commons deed URL plus 'legalcode'. The official FAQ is the primary interpretive guide.
• No Registration: No registration with Creative Commons is required. The official chooser helps create a notice but does not validate ownership.
• Key Limitation: The license applies only where copyright or similar rights require permission. Exceptions and limitations such as fair use or fair dealing operate separately; if an exception authorises the use, the license's conditions do not apply to that use.

This hub owns the overview for the entire technical and legal section. It does not answer each specific question in depth; that is what the 10 guides beneath it do. Route yourself by what you are trying to accomplish.

You Want To License Your Own Work

If you hold the copyright and want to apply a CC license to your own work, the first question is which of the six licenses fits your intent. The most permissive is CC BY 4.0, which requires only attribution. The most restrictive is CC BY-NC-ND 4.0, which permits noncommercial sharing of unadapted work only. The official license chooser on the Creative Commons website walks you through the options and generates a notice. No registration is required. Confirm that you own or control all the rights in the work before you apply a license. Joint authors, employment ownership, commissioned-work terms, performer rights, samples and third-party inclusions all need to be cleared first.

You Want To Reuse Someone Else's Work

Start by opening the original source page, not a repost, search thumbnail or platform filter. Record the creator, source URL, exact license and version, displayed notices, exclusions and the date checked. Preserve a screenshot when the use matters. Then test the intended activity against the license's conditions. If the license includes ND you cannot share an adaptation. If it includes NC you cannot use the work primarily for commercial advantage or monetary compensation. If it includes SA you must license any shared adaptation under the same or a compatible license. The four condition labels summarize the core permissions and obligations; the full legal code and applicable law still govern the use.

You Need To Understand A Specific Condition

Each condition has its own detailed guide. Attribution (BY) under 4.0 requires you to retain the creator's identification, copyright notice, license reference, warranty disclaimer and a URI or hyperlink to the work where reasonably practicable. NonCommercial (NC) is defined as not primarily intended for or directed toward commercial advantage or monetary compensation; the identity of the user does not decide the issue by itself. ShareAlike (SA) is triggered only when Adapted Material is shared, not when unchanged work appears beside other separate works in a collection. NoDerivatives (ND) permits sharing of the unadapted work but blocks sharing any adaptation.

The version 4.0 legal code is the definitive source for every license term. Creative Commons publishes the legal code alongside each license deed. The deed is a human-readable summary; the legal code governs. If a dispute arises, the legal code controls.

Automatic Termination And Cure

On breach, rights under a 4.0 license terminate automatically. They are automatically reinstated from the date the violation is cured if it is cured within 30 days after the violator discovers it. Express reinstatement by the licensor is a separate route. Cure does not erase possible liability for the period of violation. Older versions have different termination language and do not contain the same automatic 30-day mechanism.

What The License Does Not Cover

Version 4.0 expressly addresses sui generis database rights but does not license patent or trademark rights. Moral, privacy and personality rights are handled only to the limited extent stated in the legal code and may still matter. Possession of a CC-licensed copy is not a guarantee that the uploader owned all necessary rights or that every component is covered. The license applies only where copyright or similar rights require permission; exceptions and limitations such as fair use or fair dealing operate separately.

No Additional Restrictions

A recipient may not impose additional legal terms or effective technological measures that restrict another recipient's exercise of the licensed rights. Platforms with exclusive sublicensing terms, download restrictions or DRM can therefore create a conflict. Check current platform terms instead of assuming a CC badge resolves that conflict.

License	Attribution Required	Commercial Use Permitted	Adaptations Permitted	ShareAlike Required	Typical Use Case
CC BY 4.0	Yes	Yes	Yes	No	Most open license; use when you want maximum reuse with attribution only.
CC BY-SA 4.0	Yes	Yes	Yes	Yes	Use when you want adaptations to stay open under the same terms.
CC BY-ND 4.0	Yes	Yes	Private adaptations only	No	Use when you want to allow sharing but not modified versions.
CC BY-NC 4.0	Yes	No	Yes	No	Use when you want to allow noncommercial reuse only.
CC BY-NC-SA 4.0	Yes	No	Yes	Yes	Use for noncommercial sharing that must stay noncommercial.
CC BY-NC-ND 4.0	Yes	No	No	No	Most restrictive; use when you want to allow only noncommercial sharing of the exact work.

CC0 and the Public Domain Mark are not two more licenses in the suite. CC0 is a public-domain dedication with a waiver, a fallback license where waiver is not effective, and a non-assertion promise limited to remaining Copyright and Related Rights. It aims to remove copyright and related-rights conditions as far as the affirmer is legally able. The Public Domain Mark changes no rights; it marks work believed to be free of known copyright restrictions worldwide. Neither tool guarantees that privacy, publicity, trademark, patent, contract, cultural-heritage or other law permits a use. Credit is not a CC0 legal condition, but citation, research integrity, community norms and avoidance of false authorship can still make credit proper.

When To Use CC0

CC0 should be applied by a person who controls the rights being waived. Use it when you want to dedicate a work to the public domain to the fullest extent possible under applicable law. Do not use CC0 for work you do not control or for which you are not the rights holder.

When To Use The Public Domain Mark

PDM is appropriate only for work believed free of known copyright restrictions worldwide. Do not apply it to a work whose copyright status you are uncertain about. Copyright status depends on jurisdiction, author, publication facts, term, restoration rules and the type of work. Do not compute a specific work's status from a single publication year or assume a US result applies worldwide.

Do Not Call Them Licenses

Never call CC0 or PDM one of the six licenses. CC0 is a public-domain dedication tool; PDM is a marking tool. Both are distinct from the license suite and have different legal effects.

A collection keeps separate works separate, such as unchanged essays in an anthology. Each work retains its own license; the collection's overall license does not replace those licenses. Adapted Material is based on and modifies the licensed work in a way requiring copyright permission. Only the contribution made by the adapter is covered by the adapter's license; notices for the original must remain.

What Counts As An Adaptation

Translation is normally an adaptation. Synchronising music with a moving image is expressly Adapted Material under 4.0. Reproduction in a different format alone does not create Adapted Material under the 4.0 definition. Whether cropping, excerpting, editing or combining creates an adaptation can depend on applicable copyright law; do not declare a universal boundary. The official Creative Commons compatibility list controls which licenses are compatible for adapted work. Do not assume two SA licenses are compatible.

ShareAlike In Detail

ShareAlike is triggered when Adapted Material is shared, not when unchanged work merely appears beside other separate works in a collection. The adapter applies the license named by the applicable SA clause or an officially designated compatible license. Creative Commons lists one-way compatibility from BY-SA 4.0 to GPLv3 for adapted work; this does not turn a CC license into a software license or create compatibility in the reverse direction.

The Attribution Mnemonic

TASL, title, author, source, license, is a useful attribution mnemonic, not the complete legal text. For 4.0, add an indication of changes and preserve supplied notices. A consolidated credits page can be reasonable for many works if the work-to-credit mapping is clear and the credits remain readily accessible. Academic citation and license attribution serve different purposes; do both when both apply.

The 4.0 International licenses are designed to operate without jurisdiction-specific ports. However, the license does not override national laws. Moral, privacy and personality rights are handled only to the limited extent stated in the legal code and may still matter. Exceptions and limitations such as fair use or fair dealing vary by jurisdiction and operate separately from the license. If an exception authorises the use, the license's conditions do not apply to that use. Their scope varies by jurisdiction. Do not infer a country-by-country legal conclusion from this page; obtain local legal advice when the use has material commercial risk or involves sensitive rights.

What The License Does Not Guarantee

Possession of a CC-licensed copy is not a guarantee that the uploader owned all necessary rights or that every component is covered. The license applies only where copyright or similar rights require permission. Privacy, publicity, trademark, patent, contract, cultural-heritage or other law may still permit or restrict a use. The licensor may stop distributing the work or offer it under other terms, but cannot withdraw the license from people who already received it while complying with its terms.