Qt is available for download as a free 30-day commercial evaluation, or under the LGPL open source license.
LGPL / Free |
Commercial |
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| Charge for development licenses |
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| Changes to Qt source code must be shared |
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| Can create proprietary application |
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| Technical support available (Learn more) |
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Choose LGPL / Free |
Choose Commercial |
The above table is a summary only. For details on licensing, visit the Qt licensing page.
Qt SDK: Complete Development Environment |
Qt: Framework Only |
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Don't need the complete SDK? Download source packages of the Qt framework only. You can choose between LGPL and GPL during the installation process.
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Choose Your Platform |
Why choose a commercial license? |
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By registering to evaluate, you will get access to both the Qt SDK and the standalone Qt framework.
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The Qt Commercial License is the correct license to use for
To find out more, visit the Qt licensing page. |
Qt and related tools are available for download under the LGPL and GPL licenses. For more information about Qt licensing, please visit the Qt licensing page.

The Qt SDK includes the tools you need to build cross-platform applications with Qt in a single install.