
The freedoms are non-negotiable and absolute, the freedoms cannot be enjoyed selectively or partially, you also need to pass them to your users.

The freedom to run the program for any purpose.Use of open source licensing gives users four primary degrees of freedom when using Qt applications or devices: We believe in the Free Software movement where using software comes with certain rights, but also certain obligations. Ĭheck out which components are available under the different open source models in the Qt Product Map. Qt also ships with third party open source components that might require respective licensing compliancy, if used. Please note that there are parts of Qt that are only provided under GPL for open source users that will require you to license your application under a GPL compatible license. This is the primary open source Qt license, which covers the majority of Qt modules. LGPL – Any modification to a Qt component covered by the GNU Lesser General Public License must be contributed back to the community. Your users are granted rights founded on the four freedoms of the GNU General Public License.


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GPL – All users have the rights to obtain, modify and redistribute the full source code of your application. When selecting an open source license for your project, you contribute to free and open source software development by using Qt under any of the following licenses: LGPL version 3, GPL version 2 and GPL version 3.īasic Premises of the Qt Open Source Model
