We created choosealicense.com, to help you understand how to license your code. A software license tells others what they can and can't do with your source code, so it's important to make an informed decision.
You're under no obligation to choose a license. However, without a license, the default copyright laws apply, meaning that you retain all rights to your source code and no one may reproduce, distribute, or create derivative works from your work. If you're creating an open source project, we strongly encourage you to include an open source license. The Open Source Guide provides additional guidance on choosing the correct license for your project.
Note: If you publish your source code in a public repository on GitHub, other GitHub users have the right to view and fork your repository within the GitHub site. If you have already created a public repository and no longer want users to have access to it, you can make your repository private. When you convert a public repository to a private repository, existing forks or local copies created by other users will still exist. For more information, see "Making a public repository private."
Most people place their license text in a file named
LICENSE.md) in the root of the repository; here's an example from Hubot.
Some projects include information about their license in their README. For example, a project's README may include a note saying "This project is licensed under the terms of the MIT license."
As a best practice, we encourage you to include the license file with your project.
You can filter repositories based on their license or license family using the
license qualifier and the exact license keyword:
|Academic Free License v3.0|
|Apache license 2.0|
|Artistic license 2.0|
|Boost Software License 1.0|
|BSD 2-clause "Simplified" license|
|BSD 3-clause "New" or "Revised" license|
|BSD 3-clause Clear license|
|Creative Commons license family|
|Creative Commons Zero v1.0 Universal|
|Creative Commons Attribution 4.0|
|Creative Commons Attribution Share Alike 4.0|
|Do What The F*ck You Want To Public License|
|Educational Community License v2.0|
|Eclipse Public License 1.0|
|Eclipse Public License 2.0|
|European Union Public License 1.1|
|GNU Affero General Public License v3.0|
|GNU General Public License family|
|GNU General Public License v2.0|
|GNU General Public License v3.0|
|GNU Lesser General Public License family|
|GNU Lesser General Public License v2.1|
|GNU Lesser General Public License v3.0|
|LaTeX Project Public License v1.3c|
|Microsoft Public License|
|Mozilla Public License 2.0|
|Open Software License 3.0|
|SIL Open Font License 1.1|
|University of Illinois/NCSA Open Source License|
When you search by a family license, your results will include all licenses in that family. For example, when you use the query
license:gpl, your results will include repositories licensed under GNU General Public License v2.0 and GNU General Public License v3.0. For more information, see "Searching for repositories."
The open source Ruby gem Licensee compares the repository's LICENSE file to a short list of known licenses. Licensee also provides the Licenses API and gives us insight into how repositories on GitHub Enterprise Server are licensed. If your repository is using a license that isn't listed on the Choose a License website, you can request including the license.
If your repository is using a license that is listed on the Choose a License website and it's not displaying clearly at the top of the repository page, it may contain multiple licenses or other complexity. To have your license detected, simplify your LICENSE file and note the complexity somewhere else, such as your repository's README file.
The license picker is only available when you create a new project on GitHub. You can manually add a license using the browser. For more information on adding a license to a repository, see "Adding a license to a repository."
The goal of GitHub's open source licensing efforts is to provide a starting point to help you make an informed choice. GitHub displays license information to help users get information about open source licenses and the projects that use them. We hope it helps, but please keep in mind that we’re not lawyers and that we make mistakes like everyone else. For that reason, GitHub provides the information on an “as-is” basis and makes no warranties regarding any information or licenses provided on or through it, and disclaims liability for damages resulting from using the license information. If you have any questions regarding the right license for your code or any other legal issues relating to it, it’s always best to consult with a professional.
- The Open Source Guides' section "The Legal Side of Open Source"