- Info
Choose Your Download
Qt is available for download as a free 30-day commercial evaluation, or under the LGPL open source license.
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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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The above table is a summary only. For details on licensing, visit the Qt licensing page.
LGPL / Free
Qt SDK: Complete Development Environment
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Qt: Framework Only
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 The Qt SDK includes the tools you need to build cross-platform applications with Qt in a single install.
Be sure to check if Qt and Qt Creator are supported on your platform.
*Based on MinGW (download sources) tool set. Does not support VS compiler.
**Verified on Kubuntu 8.04 and 8.10.
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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.
Qt Supported Platforms | Known Issues
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Commercial
Choose Your Platform
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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  the development of proprietary and/or commercial software with Qt where you do not want to share any source code.
- Use, modify and redistribute Qt with no obligation to share your source code
- Access technical support and product updates
- Enjoy greater freedom to license your application as you wish
To find out more, visit the Qt licensing page.
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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.
